diff --git a/.github/workflows/api-kit-e2e-test.yml b/.github/workflows/api-kit-e2e-test.yml
index 204279753..e62111161 100644
--- a/.github/workflows/api-kit-e2e-test.yml
+++ b/.github/workflows/api-kit-e2e-test.yml
@@ -25,6 +25,8 @@ jobs:
         run: yarn build
 
       - name: Test
+        env:
+          API_KEY: ${{ secrets.API_KEY }}
         run: |
           cd packages/api-kit
           yarn test:ci:ethers
diff --git a/.github/workflows/cla.yml b/.github/workflows/cla.yml
index 1de37d672..f16d688b2 100644
--- a/.github/workflows/cla.yml
+++ b/.github/workflows/cla.yml
@@ -23,7 +23,7 @@ jobs:
           # branch should not be protected
           branch: 'main'
           # user names of users allowed to contribute without CLA
-          allowlist: germartinez,rmeissner,Uxio0,dasanra,luarx,DaniSomoza,yagopv,JagoFigueroa,bot*
+          allowlist: rmeissner,Uxio0,dasanra,luarx,yagopv,bot*
 
           # the followings are the optional inputs - If the optional inputs are not given, then default values will be taken
           # enter the remote organization name where the signatures should be stored (Default is storing the signatures in the same repository)
diff --git a/guides/integrating-the-safe-core-sdk.md b/guides/integrating-the-safe-core-sdk.md
index 6ca51a3f4..ecf651079 100644
--- a/guides/integrating-the-safe-core-sdk.md
+++ b/guides/integrating-the-safe-core-sdk.md
@@ -264,25 +264,39 @@ type SafeMultisigTransactionResponse = {
   data?: string
   operation: number
   gasToken: string
-  safeTxGas: number
-  baseGas: number
+  safeTxGas: string
+  baseGas: string
   gasPrice: string
   refundReceiver?: string
-  nonce: number
-  executionDate: string
+  nonce: string
+  executionDate: string | null
   submissionDate: string
   modified: string
   blockNumber?: number
-  transactionHash: string
+  transactionHash: string | null
   safeTxHash: string
-  executor?: string
+  executor: string | null
+  proposer: string | null
+  proposedByDelegate: string | null
   isExecuted: boolean
-  isSuccessful?: boolean
-  ethGasPrice?: string
-  gasUsed?: number
-  fee?: string
+  isSuccessful: boolean | null
+  ethGasPrice: string | null
+  maxFeePerGas: string | null
+  maxPriorityFeePerGas: string | null
+  gasUsed: number | null
+  fee: string | null
   origin: string
-  dataDecoded?: string
+  dataDecoded?: {
+    method: string
+    parameters: [
+      {
+        name: string
+        type: string
+        value: string
+        valueDecoded?: ValueDecoded[]
+      }
+    ]
+  }
   confirmationsRequired: number
   confirmations?: [
     {
diff --git a/packages/api-kit/.env-sample b/packages/api-kit/.env-sample
new file mode 100644
index 000000000..bf4be2592
--- /dev/null
+++ b/packages/api-kit/.env-sample
@@ -0,0 +1,2 @@
+# Transaction Service API Key
+API_KEY=
\ No newline at end of file
diff --git a/packages/api-kit/package.json b/packages/api-kit/package.json
index 419790951..0d38fb7e3 100644
--- a/packages/api-kit/package.json
+++ b/packages/api-kit/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@safe-global/api-kit",
-  "version": "3.0.2",
+  "version": "4.0.0",
   "description": "SDK that facilitates the interaction with the Safe Transaction Service API",
   "types": "dist/src/index.d.ts",
   "main": "dist/cjs/index.cjs",
@@ -46,7 +46,7 @@
   ],
   "homepage": "https://github.com/safe-global/safe-core-sdk#readme",
   "devDependencies": {
-    "@safe-global/relay-kit": "^4.0.4",
+    "@safe-global/relay-kit": "^4.0.5",
     "@safe-global/testing-kit": "^0.2.1",
     "@types/chai": "^4.3.20",
     "@types/chai-as-promised": "^7.1.8",
@@ -65,8 +65,8 @@
     "tsconfig-paths": "^4.2.0"
   },
   "dependencies": {
-    "@safe-global/protocol-kit": "^6.0.5",
-    "@safe-global/types-kit": "^2.0.1",
+    "@safe-global/protocol-kit": "^6.1.0",
+    "@safe-global/types-kit": "^3.0.0",
     "node-fetch": "^2.7.0",
     "viem": "^2.21.8"
   }
diff --git a/packages/api-kit/src/SafeApiKit.ts b/packages/api-kit/src/SafeApiKit.ts
index 88b5cdb74..b51ca2ed5 100644
--- a/packages/api-kit/src/SafeApiKit.ts
+++ b/packages/api-kit/src/SafeApiKit.ts
@@ -37,7 +37,7 @@ import {
   TokenInfoResponse,
   TransferListResponse
 } from '@safe-global/api-kit/types/safeTransactionServiceTypes'
-import { HttpMethod, sendRequest } from '@safe-global/api-kit/utils/httpRequests'
+import { HttpMethod, HttpRequest, sendRequest } from '@safe-global/api-kit/utils/httpRequests'
 import { signDelegate } from '@safe-global/api-kit/utils/signDelegate'
 import { validateEip3770Address, validateEthereumAddress } from '@safe-global/protocol-kit'
 import {
@@ -50,7 +50,7 @@ import {
   SafeOperationResponse,
   UserOperationV06
 } from '@safe-global/types-kit'
-import { TRANSACTION_SERVICE_URLS } from './utils/config'
+import { getTransactionServiceUrl } from './utils/config'
 import { isEmptyData } from './utils'
 import { getAddSafeOperationProps, isSafeOperation } from './utils/safeOperation'
 import { QUERY_PARAMS_MAP } from './utils/queryParamsMap'
@@ -60,19 +60,43 @@ export interface SafeApiKitConfig {
   chainId: bigint
   /** txServiceUrl - Safe Transaction Service URL */
   txServiceUrl?: string
+  /**
+   * apiKey - The API key to access the Safe Transaction Service.
+   * - Required if txServiceUrl is undefined
+   * - Required if txServiceUrl contains "safe.global" or "5afe.dev"
+   * - Optional otherwise
+   */
+  apiKey?: string
 }
 
 class SafeApiKit {
   #chainId: bigint
+  #apiKey?: string
   #txServiceBaseUrl: string
 
-  constructor({ chainId, txServiceUrl }: SafeApiKitConfig) {
+  constructor({ chainId, txServiceUrl, apiKey }: SafeApiKitConfig) {
     this.#chainId = chainId
 
     if (txServiceUrl) {
+      // If txServiceUrl contains safe.global or 5afe.dev, apiKey is mandatory
+      if (
+        (txServiceUrl.includes('api.safe.global') || txServiceUrl.includes('api.5afe.dev')) &&
+        !apiKey
+      ) {
+        throw new Error(
+          'apiKey is mandatory when using api.safe.global or api.5afe.dev domains. Please obtain your API key at https://developer.safe.global.'
+        )
+      }
       this.#txServiceBaseUrl = txServiceUrl
     } else {
-      const url = TRANSACTION_SERVICE_URLS[chainId.toString()]
+      // If txServiceUrl is not defined, apiKey is mandatory
+      if (!apiKey) {
+        throw new Error(
+          'apiKey is mandatory when txServiceUrl is not defined. Please obtain your API key at https://developer.safe.global.'
+        )
+      }
+
+      const url = getTransactionServiceUrl(chainId)
       if (!url) {
         throw new TypeError(
           `There is no transaction service available for chainId ${chainId}. Please set the txServiceUrl property to use a custom transaction service.`
@@ -81,6 +105,8 @@ class SafeApiKit {
 
       this.#txServiceBaseUrl = url
     }
+
+    this.#apiKey = apiKey
   }
 
   #isValidAddress(address: string) {
@@ -119,13 +145,17 @@ class SafeApiKit {
     })
   }
 
+  async #api<T>(request: HttpRequest): Promise<T> {
+    return sendRequest(request, this.#apiKey)
+  }
+
   /**
    * Returns the information and configuration of the service.
    *
    * @returns The information and configuration of the service
    */
   async getServiceInfo(): Promise<SafeServiceInfoResponse> {
-    return sendRequest({
+    return this.#api({
       url: `${this.#txServiceBaseUrl}/v1/about`,
       method: HttpMethod.Get
     })
@@ -137,7 +167,7 @@ class SafeApiKit {
    * @returns The list of Safe singletons
    */
   async getServiceSingletonsInfo(): Promise<SafeSingletonResponse[]> {
-    return sendRequest({
+    return this.#api({
       url: `${this.#txServiceBaseUrl}/v1/about/singletons`,
       method: HttpMethod.Get
     })
@@ -164,7 +194,7 @@ class SafeApiKit {
       dataDecoderRequest.to = to
     }
 
-    return sendRequest({
+    return this.#api({
       url: `${this.#txServiceBaseUrl}/v1/data-decoder/`,
       method: HttpMethod.Post,
       body: dataDecoderRequest
@@ -210,7 +240,7 @@ class SafeApiKit {
       url.searchParams.set('offset', offset.toString())
     }
 
-    return sendRequest({
+    return this.#api({
       url: url.toString(),
       method: HttpMethod.Get
     })
@@ -256,7 +286,7 @@ class SafeApiKit {
       label,
       signature
     }
-    return sendRequest({
+    return this.#api({
       url: `${this.#txServiceBaseUrl}/v2/delegates/`,
       method: HttpMethod.Post,
       body
@@ -289,7 +319,7 @@ class SafeApiKit {
     const { address: delegator } = this.#getEip3770Address(delegatorAddress)
     const signature = await signDelegate(signer, delegate, this.#chainId)
 
-    return sendRequest({
+    return this.#api({
       url: `${this.#txServiceBaseUrl}/v2/delegates/${delegate}`,
       method: HttpMethod.Delete,
       body: {
@@ -309,7 +339,7 @@ class SafeApiKit {
       throw new Error('Invalid messageHash')
     }
 
-    return sendRequest({
+    return this.#api({
       url: `${this.#txServiceBaseUrl}/v1/messages/${messageHash}/`,
       method: HttpMethod.Get
     })
@@ -334,7 +364,7 @@ class SafeApiKit {
     // Check if options are given and add query parameters
     this.#addUrlQueryParams<GetSafeMessageListOptions>(url, options)
 
-    return sendRequest({
+    return this.#api({
       url: url.toString(),
       method: HttpMethod.Get
     })
@@ -351,7 +381,7 @@ class SafeApiKit {
       throw new Error('Invalid safeAddress')
     }
 
-    return sendRequest({
+    return this.#api({
       url: `${this.#txServiceBaseUrl}/v1/safes/${safeAddress}/messages/`,
       method: HttpMethod.Post,
       body: addMessageOptions
@@ -368,7 +398,7 @@ class SafeApiKit {
       throw new Error('Invalid messageHash or signature')
     }
 
-    return sendRequest({
+    return this.#api({
       url: `${this.#txServiceBaseUrl}/v1/messages/${messageHash}/signatures/`,
       method: HttpMethod.Post,
       body: {
@@ -390,7 +420,7 @@ class SafeApiKit {
       throw new Error('Invalid owner address')
     }
     const { address } = this.#getEip3770Address(ownerAddress)
-    return sendRequest({
+    return this.#api({
       url: `${this.#txServiceBaseUrl}/v1/owners/${address}/safes/`,
       method: HttpMethod.Get
     })
@@ -409,7 +439,7 @@ class SafeApiKit {
       throw new Error('Invalid module address')
     }
     const { address } = this.#getEip3770Address(moduleAddress)
-    return sendRequest({
+    return this.#api({
       url: `${this.#txServiceBaseUrl}/v1/modules/${address}/safes/`,
       method: HttpMethod.Get
     })
@@ -427,8 +457,8 @@ class SafeApiKit {
     if (safeTxHash === '') {
       throw new Error('Invalid safeTxHash')
     }
-    return sendRequest({
-      url: `${this.#txServiceBaseUrl}/v1/multisig-transactions/${safeTxHash}/`,
+    return this.#api({
+      url: `${this.#txServiceBaseUrl}/v2/multisig-transactions/${safeTxHash}/`,
       method: HttpMethod.Get
     })
   }
@@ -446,7 +476,7 @@ class SafeApiKit {
     if (safeTxHash === '') {
       throw new Error('Invalid safeTxHash')
     }
-    return sendRequest({
+    return this.#api({
       url: `${this.#txServiceBaseUrl}/v1/multisig-transactions/${safeTxHash}/confirmations/`,
       method: HttpMethod.Get
     })
@@ -470,7 +500,7 @@ class SafeApiKit {
     if (signature === '') {
       throw new Error('Invalid signature')
     }
-    return sendRequest({
+    return this.#api({
       url: `${this.#txServiceBaseUrl}/v1/multisig-transactions/${safeTxHash}/confirmations/`,
       method: HttpMethod.Post,
       body: {
@@ -492,7 +522,7 @@ class SafeApiKit {
       throw new Error('Invalid Safe address')
     }
     const { address } = this.#getEip3770Address(safeAddress)
-    return sendRequest({
+    return this.#api({
       url: `${this.#txServiceBaseUrl}/v1/safes/${address}/`,
       method: HttpMethod.Get
     }).then((response: any) => {
@@ -521,7 +551,7 @@ class SafeApiKit {
       throw new Error('Invalid Safe address')
     }
     const { address } = this.#getEip3770Address(safeAddress)
-    return sendRequest({
+    return this.#api({
       url: `${this.#txServiceBaseUrl}/v1/safes/${address}/creation/`,
       method: HttpMethod.Get
     }).then((response: any) => {
@@ -554,7 +584,7 @@ class SafeApiKit {
       throw new Error('Invalid Safe address')
     }
     const { address } = this.#getEip3770Address(safeAddress)
-    return sendRequest({
+    return this.#api({
       url: `${this.#txServiceBaseUrl}/v1/safes/${address}/multisig-transactions/estimations/`,
       method: HttpMethod.Post,
       body: safeTransaction
@@ -587,8 +617,8 @@ class SafeApiKit {
     if (safeTxHash === '') {
       throw new Error('Invalid safeTxHash')
     }
-    return sendRequest({
-      url: `${this.#txServiceBaseUrl}/v1/safes/${safe}/multisig-transactions/`,
+    return this.#api({
+      url: `${this.#txServiceBaseUrl}/v2/safes/${safe}/multisig-transactions/`,
       method: HttpMethod.Post,
       body: {
         ...safeTransactionData,
@@ -622,7 +652,7 @@ class SafeApiKit {
     // Check if options are given and add query parameters
     this.#addUrlQueryParams<GetIncomingTransactionsOptions>(url, options)
 
-    return sendRequest({
+    return this.#api({
       url: url.toString(),
       method: HttpMethod.Get
     })
@@ -651,7 +681,7 @@ class SafeApiKit {
     // Check if options are given and add query parameters
     this.#addUrlQueryParams<GetModuleTransactionsOptions>(url, options)
 
-    return sendRequest({
+    return this.#api({
       url: url.toString(),
       method: HttpMethod.Get
     })
@@ -675,12 +705,12 @@ class SafeApiKit {
     }
 
     const { address } = this.#getEip3770Address(safeAddress)
-    const url = new URL(`${this.#txServiceBaseUrl}/v1/safes/${address}/multisig-transactions/`)
+    const url = new URL(`${this.#txServiceBaseUrl}/v2/safes/${address}/multisig-transactions/`)
 
     // Check if options are given and add query parameters
     this.#addUrlQueryParams<GetMultisigTransactionsOptions>(url, options)
 
-    return sendRequest({
+    return this.#api({
       url: url.toString(),
       method: HttpMethod.Get
     })
@@ -709,7 +739,7 @@ class SafeApiKit {
     const nonce = currentNonce ? currentNonce : (await this.getSafeInfo(address)).nonce
 
     const url = new URL(
-      `${this.#txServiceBaseUrl}/v1/safes/${address}/multisig-transactions/?executed=false&nonce__gte=${nonce}`
+      `${this.#txServiceBaseUrl}/v2/safes/${address}/multisig-transactions/?executed=false&nonce__gte=${nonce}`
     )
 
     if (hasConfirmations) {
@@ -728,7 +758,7 @@ class SafeApiKit {
       url.searchParams.set('offset', offset.toString())
     }
 
-    return sendRequest({
+    return this.#api({
       url: url.toString(),
       method: HttpMethod.Get
     })
@@ -752,12 +782,12 @@ class SafeApiKit {
       throw new Error('Invalid Safe address')
     }
     const { address } = this.#getEip3770Address(safeAddress)
-    const url = new URL(`${this.#txServiceBaseUrl}/v1/safes/${address}/all-transactions/`)
+    const url = new URL(`${this.#txServiceBaseUrl}/v2/safes/${address}/all-transactions/`)
 
     // Check if options are given and add query parameters
     this.#addUrlQueryParams<AllTransactionsOptions>(url, options)
 
-    return sendRequest({
+    return this.#api({
       url: url.toString(),
       method: HttpMethod.Get
     })
@@ -802,7 +832,7 @@ class SafeApiKit {
     // Check if options are given and add query parameters
     this.#addUrlQueryParams<TokenInfoListOptions>(url, options)
 
-    return sendRequest({
+    return this.#api({
       url: url.toString(),
       method: HttpMethod.Get
     })
@@ -821,7 +851,7 @@ class SafeApiKit {
       throw new Error('Invalid token address')
     }
     const { address } = this.#getEip3770Address(tokenAddress)
-    return sendRequest({
+    return this.#api({
       url: `${this.#txServiceBaseUrl}/v1/tokens/${address}/`,
       method: HttpMethod.Get
     })
@@ -850,7 +880,7 @@ class SafeApiKit {
     // Check if options are given and add query parameters
     this.#addUrlQueryParams<TokenInfoListOptions>(url, options)
 
-    return sendRequest({
+    return this.#api({
       url: url.toString(),
       method: HttpMethod.Get
     })
@@ -886,7 +916,7 @@ class SafeApiKit {
       throw new Error('SafeOperation hash must not be empty')
     }
 
-    return sendRequest({
+    return this.#api({
       url: `${this.#txServiceBaseUrl}/v1/safe-operations/${safeOperationHash}/`,
       method: HttpMethod.Get
     })
@@ -947,7 +977,7 @@ class SafeApiKit {
 
     const userOperationV06 = userOperation as UserOperationV06
 
-    return sendRequest({
+    return this.#api({
       url: `${this.#txServiceBaseUrl}/v1/safes/${safeAddress}/safe-operations/`,
       method: HttpMethod.Post,
       body: {
@@ -1000,7 +1030,7 @@ class SafeApiKit {
       url.searchParams.set('offset', offset.toString())
     }
 
-    return sendRequest({
+    return this.#api({
       url: url.toString(),
       method: HttpMethod.Get
     })
@@ -1024,7 +1054,7 @@ class SafeApiKit {
     if (!signature) {
       throw new Error('Invalid signature')
     }
-    return sendRequest({
+    return this.#api({
       url: `${this.#txServiceBaseUrl}/v1/safe-operations/${safeOperationHash}/confirmations/`,
       method: HttpMethod.Post,
       body: { signature }
diff --git a/packages/api-kit/src/utils/config.ts b/packages/api-kit/src/utils/config.ts
index 7310f6a8a..ffce90d8a 100644
--- a/packages/api-kit/src/utils/config.ts
+++ b/packages/api-kit/src/utils/config.ts
@@ -1,23 +1,47 @@
-export const TRANSACTION_SERVICE_URLS: Record<string, string> = {
-  '1': 'https://safe-transaction-mainnet.safe.global/api',
-  '10': 'https://safe-transaction-optimism.safe.global/api',
-  '56': 'https://safe-transaction-bsc.safe.global/api',
-  '100': 'https://safe-transaction-gnosis-chain.safe.global/api',
-  '130': 'https://safe-transaction-unichain.safe.global/api',
-  '137': 'https://safe-transaction-polygon.safe.global/api',
-  '196': 'https://safe-transaction-xlayer.safe.global/api',
-  '324': 'https://safe-transaction-zksync.safe.global/api',
-  '480': 'https://safe-transaction-worldchain.safe.global/api',
-  '1101': 'https://safe-transaction-zkevm.safe.global/api',
-  '5000': 'https://safe-transaction-mantle.safe.global/api',
-  '8453': 'https://safe-transaction-base.safe.global/api',
-  '42161': 'https://safe-transaction-arbitrum.safe.global/api',
-  '42220': 'https://safe-transaction-celo.safe.global/api',
-  '43114': 'https://safe-transaction-avalanche.safe.global/api',
-  '59144': 'https://safe-transaction-linea.safe.global/api',
-  '81457': 'https://safe-transaction-blast.safe.global/api',
-  '84532': 'https://safe-transaction-base-sepolia.safe.global/api',
-  '534352': 'https://safe-transaction-scroll.safe.global/api',
-  '11155111': 'https://safe-transaction-sepolia.safe.global/api',
-  '1313161554': 'https://safe-transaction-aurora.safe.global/api'
+const TRANSACTION_SERVICE_URL = 'https://api.safe.global/tx-service'
+
+type NetworkShortName = {
+  shortName: string
+  chainId: bigint
+}
+
+export const networks: NetworkShortName[] = [
+  { chainId: 1n, shortName: 'eth' },
+  { chainId: 10n, shortName: 'oeth' },
+  { chainId: 56n, shortName: 'bnb' },
+  { chainId: 100n, shortName: 'gno' },
+  { chainId: 130n, shortName: 'unichain' },
+  { chainId: 137n, shortName: 'pol' },
+  { chainId: 146n, shortName: 'sonic' },
+  { chainId: 196n, shortName: 'okb' },
+  { chainId: 232n, shortName: 'lens' },
+  { chainId: 324n, shortName: 'zksync' },
+  { chainId: 480n, shortName: 'wc' },
+  { chainId: 1101n, shortName: 'zkevm' },
+  { chainId: 5000n, shortName: 'mantle' },
+  { chainId: 8453n, shortName: 'base' },
+  { chainId: 10200n, shortName: 'chi' },
+  { chainId: 42161n, shortName: 'arb1' },
+  { chainId: 43111n, shortName: 'hemi' },
+  { chainId: 57073n, shortName: 'ink' },
+  { chainId: 80094n, shortName: 'berachain' },
+  { chainId: 59144n, shortName: 'linea' },
+  { chainId: 42220n, shortName: 'celo' },
+  { chainId: 43114n, shortName: 'avax' },
+  { chainId: 84532n, shortName: 'basesep' },
+  { chainId: 534352n, shortName: 'scr' },
+  { chainId: 11155111n, shortName: 'sep' },
+  { chainId: 1313161554n, shortName: 'aurora' }
+]
+
+export const getNetworkShortName = (chainId: bigint): string => {
+  const network = networks.find((n) => n.chainId === chainId)
+  if (!network) {
+    throw new Error(`Network with chainId ${chainId} not found`)
+  }
+  return network.shortName
+}
+
+export const getTransactionServiceUrl = (chainId: bigint) => {
+  return `${TRANSACTION_SERVICE_URL}/${getNetworkShortName(chainId)}/api`
 }
diff --git a/packages/api-kit/src/utils/httpRequests.ts b/packages/api-kit/src/utils/httpRequests.ts
index 506ca8973..972d19fd7 100644
--- a/packages/api-kit/src/utils/httpRequests.ts
+++ b/packages/api-kit/src/utils/httpRequests.ts
@@ -4,23 +4,32 @@ export enum HttpMethod {
   Delete = 'delete'
 }
 
-interface HttpRequest {
+export interface HttpRequest {
   url: string
   method: HttpMethod
   body?: any
 }
 
-export async function sendRequest<T>({ url, method, body }: HttpRequest): Promise<T> {
+export async function sendRequest<T>(
+  { url, method, body }: HttpRequest,
+  apiKey?: string
+): Promise<T> {
   const fetch = await (typeof window === 'undefined'
     ? import('node-fetch').then((m) => m.default)
     : Promise.resolve(window.fetch))
 
+  const headers: Record<string, string> = {
+    Accept: 'application/json',
+    'Content-Type': 'application/json'
+  }
+
+  if (apiKey) {
+    headers['Authorization'] = `Bearer ${apiKey}`
+  }
+
   const response = await fetch(url, {
     method,
-    headers: {
-      Accept: 'application/json',
-      'Content-Type': 'application/json'
-    },
+    headers,
     body: JSON.stringify(body)
   })
 
diff --git a/packages/api-kit/tests/e2e/addSafeDelegate.test.ts b/packages/api-kit/tests/e2e/addSafeDelegate.test.ts
index 957625c9c..156f62994 100644
--- a/packages/api-kit/tests/e2e/addSafeDelegate.test.ts
+++ b/packages/api-kit/tests/e2e/addSafeDelegate.test.ts
@@ -19,7 +19,7 @@ let delegatorAddress: Address
 
 describe('addSafeDelegate', () => {
   before(() => {
-    safeApiKit = getApiKit('https://safe-transaction-sepolia.staging.5afe.dev/api')
+    safeApiKit = getApiKit()
     signer = createWalletClient({
       chain: sepolia,
       transport: http(),
diff --git a/packages/api-kit/tests/e2e/addSafeOperation.test.ts b/packages/api-kit/tests/e2e/addSafeOperation.test.ts
index e99b1cd55..f715875fa 100644
--- a/packages/api-kit/tests/e2e/addSafeOperation.test.ts
+++ b/packages/api-kit/tests/e2e/addSafeOperation.test.ts
@@ -13,7 +13,6 @@ const SIGNER_PK = '0x83a415ca62e11f5fa5567e98450d0f82ae19ff36ef876c10a8d448c788a
 const SAFE_ADDRESS = '0x60C4Ab82D06Fd7dFE9517e17736C2Dcc77443EF0' // 1/2 Safe (v1.4.1) with signer above being an owner + 4337 module enabled
 const PAYMASTER_TOKEN_ADDRESS = '0x1c7D4B196Cb0C7B01d743Fbc6116a902379C7238'
 const BUNDLER_URL = 'https://api.pimlico.io/v2/sepolia/rpc?apikey=pim_Vjs7ohRqWdvsjUegngf9Bg'
-const TX_SERVICE_URL = 'https://safe-transaction-sepolia.staging.5afe.dev/api'
 
 let safeApiKit: SafeApiKit
 let protocolKit: Safe
@@ -30,8 +29,7 @@ describe('addSafeOperation', () => {
   before(async () => {
     ;({ safeApiKit, protocolKit } = await getKits({
       safeAddress: SAFE_ADDRESS,
-      signer: SIGNER_PK,
-      txServiceUrl: TX_SERVICE_URL
+      signer: SIGNER_PK
     }))
 
     safe4337Pack = await Safe4337Pack.init({
diff --git a/packages/api-kit/tests/e2e/confirmSafeOperation.test.ts b/packages/api-kit/tests/e2e/confirmSafeOperation.test.ts
index cf7750993..9e6895e2b 100644
--- a/packages/api-kit/tests/e2e/confirmSafeOperation.test.ts
+++ b/packages/api-kit/tests/e2e/confirmSafeOperation.test.ts
@@ -11,7 +11,6 @@ chai.use(chaiAsPromised)
 const PRIVATE_KEY_1 = '0x83a415ca62e11f5fa5567e98450d0f82ae19ff36ef876c10a8d448c788a53676' // 0x56e2C102c664De6DfD7315d12c0178b61D16F171
 const PRIVATE_KEY_2 = '0xb88ad5789871315d0dab6fc5961d6714f24f35a6393f13a6f426dfecfc00ab44' // 0x9cCBDE03eDd71074ea9c49e413FA9CDfF16D263B
 const SAFE_ADDRESS = '0x60C4Ab82D06Fd7dFE9517e17736C2Dcc77443EF0' // 4337 enabled 1/2 Safe (v1.4.1) owned by PRIVATE_KEY_1 + PRIVATE_KEY_2
-const TX_SERVICE_URL = 'https://safe-transaction-sepolia.staging.5afe.dev/api'
 const BUNDLER_URL = 'https://api.pimlico.io/v2/sepolia/rpc?apikey=pim_Vjs7ohRqWdvsjUegngf9Bg'
 const PAYMASTER_TOKEN_ADDRESS = '0x1c7D4B196Cb0C7B01d743Fbc6116a902379C7238'
 
@@ -62,7 +61,7 @@ describe('confirmSafeOperation', () => {
 
   before(async () => {
     safe4337Pack = await getSafe4337Pack({ signer: PRIVATE_KEY_1 })
-    safeApiKit = getApiKit(TX_SERVICE_URL)
+    safeApiKit = getApiKit()
 
     // Submit a new Safe operation to the transaction service
     safeOperation = await addSafeOperation()
diff --git a/packages/api-kit/tests/e2e/getPendingSafeOperations.test.ts b/packages/api-kit/tests/e2e/getPendingSafeOperations.test.ts
index 93f229fe4..e50b4f36d 100644
--- a/packages/api-kit/tests/e2e/getPendingSafeOperations.test.ts
+++ b/packages/api-kit/tests/e2e/getPendingSafeOperations.test.ts
@@ -6,13 +6,12 @@ import { getApiKit } from '../utils/setupKits'
 chai.use(chaiAsPromised)
 
 const SAFE_ADDRESS = '0x60C4Ab82D06Fd7dFE9517e17736C2Dcc77443EF0' // v1.4.1
-const TX_SERVICE_URL = 'https://safe-transaction-sepolia.staging.5afe.dev/api'
 
 let safeApiKit: SafeApiKit
 
 describe('getPendingSafeOperations', () => {
   before(async () => {
-    safeApiKit = getApiKit(TX_SERVICE_URL)
+    safeApiKit = getApiKit()
   })
 
   describe('should fail', () => {
diff --git a/packages/api-kit/tests/e2e/getSafeDelegates.test.ts b/packages/api-kit/tests/e2e/getSafeDelegates.test.ts
index 5c541c979..900a849e1 100644
--- a/packages/api-kit/tests/e2e/getSafeDelegates.test.ts
+++ b/packages/api-kit/tests/e2e/getSafeDelegates.test.ts
@@ -23,7 +23,7 @@ describe('getSafeDelegates', () => {
   const safeAddress = API_TESTING_SAFE.address
 
   before(() => {
-    safeApiKit = getApiKit('https://safe-transaction-sepolia.staging.5afe.dev/api')
+    safeApiKit = getApiKit()
     signer = createWalletClient({
       chain: sepolia,
       transport: http(),
diff --git a/packages/api-kit/tests/e2e/getSafeOperation.test.ts b/packages/api-kit/tests/e2e/getSafeOperation.test.ts
index 03c5df50d..0d20ce2e0 100644
--- a/packages/api-kit/tests/e2e/getSafeOperation.test.ts
+++ b/packages/api-kit/tests/e2e/getSafeOperation.test.ts
@@ -6,13 +6,12 @@ import { getApiKit } from '../utils/setupKits'
 chai.use(chaiAsPromised)
 
 const SAFE_ADDRESS = '0x60C4Ab82D06Fd7dFE9517e17736C2Dcc77443EF0' // v1.4.1
-const TX_SERVICE_URL = 'https://safe-transaction-sepolia.staging.5afe.dev/api'
 
 let safeApiKit: SafeApiKit
 
 describe('getSafeOperation', () => {
   before(async () => {
-    safeApiKit = getApiKit(TX_SERVICE_URL)
+    safeApiKit = getApiKit()
   })
 
   describe('should fail', () => {
diff --git a/packages/api-kit/tests/e2e/getSafeOperationConfirmations.test.ts b/packages/api-kit/tests/e2e/getSafeOperationConfirmations.test.ts
index 5ea3aa12b..091de44b0 100644
--- a/packages/api-kit/tests/e2e/getSafeOperationConfirmations.test.ts
+++ b/packages/api-kit/tests/e2e/getSafeOperationConfirmations.test.ts
@@ -8,30 +8,29 @@ chai.use(chaiAsPromised)
 
 let safeApiKit: SafeApiKit
 
-const TX_SERVICE_URL = 'https://safe-transaction-sepolia.staging.5afe.dev/api'
-const SAFE_OPERATION_HASH = '0x375d3bd580600ce04d7d2c1d8d88d85f27b9c7d14d7b544f2ee585d672f2b449'
+const SAFE_OPERATION_HASH = '0x9d473e819a15ef68d253a31d56e8da9c982d8d589171c0640d673e3ebf4efff7'
 const EXPECTED_SAFE_OPERATION_CONFIRMATIONS = [
   {
-    created: '2024-06-19T10:45:22.906337Z',
-    modified: '2024-06-19T10:45:22.906337Z',
+    created: '2025-02-05T09:57:34.085839Z',
+    modified: '2025-02-05T09:57:34.085839Z',
     owner: '0x56e2C102c664De6DfD7315d12c0178b61D16F171',
     signature:
-      '0x3c4a706f78e269e20e046f06a153ff06842045bf2c9e7b28aa9f4e93b530c8aa67b8c0871ae008987ad9d1abbe1aa48efbae3b425c791ba03ed1a7542e07c9ce1b',
+      '0x564109d2728c7e902ee3b7296b1473e1b9778a2d46ea6f2b5496474553d17b2c4d4a5fc9991ac6bb8cc786f029762624348bde1d11d76579e4d28874eaf461ba1b',
     signatureType: 'EOA'
   },
   {
-    created: '2024-06-19T10:45:25.895780Z',
-    modified: '2024-06-19T10:45:25.895780Z',
+    created: '2025-02-05T09:57:35.660515Z',
+    modified: '2025-02-05T09:57:35.660515Z',
     owner: '0x9cCBDE03eDd71074ea9c49e413FA9CDfF16D263B',
     signature:
-      '0x619619f4f29578bc9cc4396ceb4b8ee6cc8722bc011f6cf3ace3c903b29162a07e2ddb3af4beccecd8ce68252af177a29f613d1d27c7961b0fc61cf09a0347fa1b',
+      '0x8147447f780d306ad3436212f11e8c5f174e9fbbd519e6258d88db87369f385127af10385e68bbe9dc9d4544bbad32a0327632a8414bd8d1d0f691ed844c142f1c',
     signatureType: 'EOA'
   }
 ]
 
 describe('getSafeOperationConfirmations', () => {
   before(() => {
-    safeApiKit = getApiKit(TX_SERVICE_URL)
+    safeApiKit = getApiKit()
   })
 
   it('should fail if safeOperationHash is empty', async () => {
diff --git a/packages/api-kit/tests/e2e/getSafeOperationsByAddress.test.ts b/packages/api-kit/tests/e2e/getSafeOperationsByAddress.test.ts
index 8d365c0af..5c796ff93 100644
--- a/packages/api-kit/tests/e2e/getSafeOperationsByAddress.test.ts
+++ b/packages/api-kit/tests/e2e/getSafeOperationsByAddress.test.ts
@@ -7,13 +7,12 @@ import { getApiKit } from '../utils/setupKits'
 chai.use(chaiAsPromised)
 
 const SAFE_ADDRESS = '0x60C4Ab82D06Fd7dFE9517e17736C2Dcc77443EF0' // v1.4.1
-const TX_SERVICE_URL = 'https://safe-transaction-sepolia.staging.5afe.dev/api'
 
 let safeApiKit: SafeApiKit
 
 describe('getSafeOperationsByAddress', () => {
   before(async () => {
-    safeApiKit = getApiKit(TX_SERVICE_URL)
+    safeApiKit = getApiKit()
   })
 
   let safeOperations: SafeOperationResponse[]
diff --git a/packages/api-kit/tests/e2e/getServiceInfo.test.ts b/packages/api-kit/tests/e2e/getServiceInfo.test.ts
index 2b4c42140..a3f550461 100644
--- a/packages/api-kit/tests/e2e/getServiceInfo.test.ts
+++ b/packages/api-kit/tests/e2e/getServiceInfo.test.ts
@@ -1,16 +1,28 @@
 import { expect } from 'chai'
-import SafeApiKit from '@safe-global/api-kit/index'
+import { getTransactionServiceUrl, networks } from '@safe-global/api-kit/utils/config'
 import { getApiKit } from '../utils/setupKits'
 
-let safeApiKit: SafeApiKit
-
 describe('getServiceInfo', () => {
-  before(async () => {
-    safeApiKit = getApiKit()
-  })
-
   it('should return the Safe service info', async () => {
+    const safeApiKit = getApiKit()
     const serviceInfo = await safeApiKit.getServiceInfo()
     expect(serviceInfo.api_version).to.be.equal('v1')
   })
+
+  describe('Network tests', () => {
+    beforeEach(function (done) {
+      setTimeout(done, 250) // 250 ms delay to avoid rate limiting issues
+    })
+
+    networks.forEach((network) => {
+      it(`should return correct network info for chainId ${network.chainId} (${getTransactionServiceUrl(network.chainId)})`, async function () {
+        this.timeout(10000)
+        const safeApiKit = getApiKit(undefined, network.chainId)
+        const serviceInfo = await safeApiKit.getServiceInfo()
+
+        expect(serviceInfo).to.have.property('version').to.be.a('string').not.empty
+        expect(serviceInfo).to.have.property('name').to.be.a('string').not.empty
+      })
+    })
+  })
 })
diff --git a/packages/api-kit/tests/e2e/getTransaction.test.ts b/packages/api-kit/tests/e2e/getTransaction.test.ts
index 8e18393fc..c4be3fb25 100644
--- a/packages/api-kit/tests/e2e/getTransaction.test.ts
+++ b/packages/api-kit/tests/e2e/getTransaction.test.ts
@@ -30,8 +30,8 @@ describe('getTransaction', () => {
     const transaction = await safeApiKit.getTransaction(safeTxHash)
     chai.expect(transaction.safeTxHash).to.be.equal(safeTxHash)
     chai.expect(transaction.safe).to.be.eq(API_TESTING_SAFE.address)
-    chai.expect(transaction.nonce).to.be.a('number')
-    chai.expect(transaction.safeTxGas).to.be.a('number')
-    chai.expect(transaction.baseGas).to.be.a('number')
+    chai.expect(transaction.nonce).to.be.a('string')
+    chai.expect(transaction.safeTxGas).to.be.a('string')
+    chai.expect(transaction.baseGas).to.be.a('string')
   })
 })
diff --git a/packages/api-kit/tests/e2e/removeSafeDelegate.test.ts b/packages/api-kit/tests/e2e/removeSafeDelegate.test.ts
index 33fa203dd..acf06fb60 100644
--- a/packages/api-kit/tests/e2e/removeSafeDelegate.test.ts
+++ b/packages/api-kit/tests/e2e/removeSafeDelegate.test.ts
@@ -17,7 +17,7 @@ let delegatorAddress: Address
 
 describe('removeSafeDelegate', () => {
   before(() => {
-    safeApiKit = getApiKit('https://safe-transaction-sepolia.staging.5afe.dev/api')
+    safeApiKit = getApiKit()
     signer = createWalletClient({
       chain: sepolia,
       transport: http(),
diff --git a/packages/api-kit/tests/endpoint/SafeApiKit.test.ts b/packages/api-kit/tests/endpoint/SafeApiKit.test.ts
new file mode 100644
index 000000000..242037005
--- /dev/null
+++ b/packages/api-kit/tests/endpoint/SafeApiKit.test.ts
@@ -0,0 +1,93 @@
+import chai from 'chai'
+import chaiAsPromised from 'chai-as-promised'
+import SafeApiKit from '@safe-global/api-kit/index'
+import config from '../utils/config'
+
+chai.use(chaiAsPromised)
+const { expect } = chai
+
+describe('SafeApiKit', () => {
+  const chainId = config.CHAIN_ID
+
+  describe('txServiceUrl with api.safe.global domain', () => {
+    it('should throw an error when txServiceUrl contains safe.global and apiKey is not provided', () => {
+      expect(() => {
+        new SafeApiKit({
+          chainId,
+          txServiceUrl: 'https://api.safe.global/tx-service'
+        })
+      }).to.throw('apiKey is mandatory when using api.safe.global or api.5afe.dev domains')
+    })
+
+    it('should instantiate successfully when txServiceUrl contains api.safe.global and apiKey is provided', () => {
+      expect(() => {
+        new SafeApiKit({
+          chainId,
+          txServiceUrl: 'https://api.safe.global/tx-service',
+          apiKey: 'valid-api-key'
+        })
+      }).not.to.throw()
+    })
+  })
+
+  describe('txServiceUrl with api.5afe.dev domain', () => {
+    it('should throw an error when txServiceUrl contains api.5afe.dev and apiKey is not provided', () => {
+      expect(() => {
+        new SafeApiKit({
+          chainId,
+          txServiceUrl: 'https://api.5afe.dev/tx-service'
+        })
+      }).to.throw('apiKey is mandatory when using api.safe.global or api.5afe.dev domains')
+    })
+
+    it('should instantiate successfully when txServiceUrl contains api.5afe.dev and apiKey is provided', () => {
+      expect(() => {
+        new SafeApiKit({
+          chainId,
+          txServiceUrl: 'https://api.5afe.dev/tx-service',
+          apiKey: 'valid-api-key'
+        })
+      }).not.to.throw()
+    })
+  })
+
+  describe('txServiceUrl with other domains', () => {
+    it('should instantiate successfully when txServiceUrl is for a custom domain and apiKey is not provided', () => {
+      expect(() => {
+        new SafeApiKit({
+          chainId,
+          txServiceUrl: 'https://my-custom-service.example.com'
+        })
+      }).not.to.throw()
+    })
+
+    it('should instantiate successfully when txServiceUrl is for a custom domain and apiKey is provided', () => {
+      expect(() => {
+        new SafeApiKit({
+          chainId,
+          txServiceUrl: 'https://my-custom-service.example.com',
+          apiKey: 'valid-api-key'
+        })
+      }).not.to.throw()
+    })
+  })
+
+  describe('no txServiceUrl provided', () => {
+    it('should throw an error when txServiceUrl is not provided and apiKey is not provided', () => {
+      expect(() => {
+        new SafeApiKit({
+          chainId
+        })
+      }).to.throw('apiKey is mandatory when txServiceUrl is not defined')
+    })
+
+    it('should instantiate successfully when txServiceUrl is not provided and apiKey is provided', () => {
+      expect(() => {
+        new SafeApiKit({
+          chainId,
+          apiKey: 'valid-api-key'
+        })
+      }).not.to.throw()
+    })
+  })
+})
diff --git a/packages/api-kit/tests/endpoint/index.test.ts b/packages/api-kit/tests/endpoint/index.test.ts
index d8f8371f3..3c5e1f9a2 100644
--- a/packages/api-kit/tests/endpoint/index.test.ts
+++ b/packages/api-kit/tests/endpoint/index.test.ts
@@ -17,6 +17,7 @@ import { UserOperation } from '@safe-global/types-kit'
 import { signDelegate } from '@safe-global/api-kit/utils/signDelegate'
 import config from '../utils/config'
 import { getApiKit, getKits } from '../utils/setupKits'
+import { getTransactionServiceUrl } from '@safe-global/api-kit/utils/config'
 
 chai.use(chaiAsPromised)
 chai.use(sinonChai)
@@ -34,7 +35,7 @@ const tokenAddress = '0xfFf9976782d46CC05630D1f6eBAb18b2324d6B14'
 const eip3770TokenAddress = `${config.EIP_3770_PREFIX}:${tokenAddress}`
 const safeTxHash = '0x317834aea988fd3cfa54fd8b2be2c96b4fd70a14d8c9470a7110576b01e6480a'
 const safeOpHash = '0x8b1840745ec0a6288e868c6e285dadcfebd49e846d307610a9ccd97f445ace93'
-const txServiceBaseUrl = 'https://safe-transaction-sepolia.safe.global/api'
+const txServiceBaseUrl = getTransactionServiceUrl(11155111n)
 
 const signer = createWalletClient({
   transport: http(),
@@ -140,7 +141,7 @@ describe('Endpoint tests', () => {
         .expect(safeApiKit.getTransaction(safeTxHash))
         .to.be.eventually.deep.equals({ data: { success: true } })
       chai.expect(fetchData).to.have.been.calledWith({
-        url: `${txServiceBaseUrl}/v1/multisig-transactions/${safeTxHash}/`,
+        url: `${txServiceBaseUrl}/v2/multisig-transactions/${safeTxHash}/`,
         method: 'get'
       })
     })
@@ -396,7 +397,7 @@ describe('Endpoint tests', () => {
         )
         .to.be.eventually.deep.equals({ data: { success: true } })
       chai.expect(fetchData).to.have.been.calledWith({
-        url: `${txServiceBaseUrl}/v1/safes/${safeAddress}/multisig-transactions/`,
+        url: `${txServiceBaseUrl}/v2/safes/${safeAddress}/multisig-transactions/`,
         method: 'post',
         body: {
           ...safeTransactionData,
@@ -444,7 +445,7 @@ describe('Endpoint tests', () => {
         )
         .to.be.eventually.deep.equals({ data: { success: true } })
       chai.expect(fetchData).to.have.been.calledWith({
-        url: `${txServiceBaseUrl}/v1/safes/${safeAddress}/multisig-transactions/`,
+        url: `${txServiceBaseUrl}/v2/safes/${safeAddress}/multisig-transactions/`,
         method: 'post',
         body: {
           ...safeTransactionData,
@@ -512,7 +513,7 @@ describe('Endpoint tests', () => {
         .expect(safeApiKit.getMultisigTransactions(safeAddress))
         .to.be.eventually.deep.equals({ data: { success: true } })
       chai.expect(fetchData).to.have.been.calledWith({
-        url: `${txServiceBaseUrl}/v1/safes/${safeAddress}/multisig-transactions/`,
+        url: `${txServiceBaseUrl}/v2/safes/${safeAddress}/multisig-transactions/`,
         method: 'get'
       })
     })
@@ -522,7 +523,7 @@ describe('Endpoint tests', () => {
         .expect(safeApiKit.getMultisigTransactions(eip3770SafeAddress))
         .to.be.eventually.deep.equals({ data: { success: true } })
       chai.expect(fetchData).to.have.been.calledWith({
-        url: `${txServiceBaseUrl}/v1/safes/${safeAddress}/multisig-transactions/`,
+        url: `${txServiceBaseUrl}/v2/safes/${safeAddress}/multisig-transactions/`,
         method: 'get'
       })
     })
@@ -532,7 +533,7 @@ describe('Endpoint tests', () => {
         .expect(safeApiKit.getMultisigTransactions(safeAddress, { executed: true }))
         .to.be.eventually.deep.equals({ data: { success: true } })
       chai.expect(fetchData).to.have.been.calledWith({
-        url: `${txServiceBaseUrl}/v1/safes/${safeAddress}/multisig-transactions/?executed=true`,
+        url: `${txServiceBaseUrl}/v2/safes/${safeAddress}/multisig-transactions/?executed=true`,
         method: 'get'
       })
     })
@@ -547,7 +548,7 @@ describe('Endpoint tests', () => {
         )
         .to.be.eventually.deep.equals({ data: { success: true } })
       chai.expect(fetchData).to.have.been.calledWith({
-        url: `${txServiceBaseUrl}/v1/safes/${safeAddress}/multisig-transactions/?has_confirmations=true&nonce__gte=1`,
+        url: `${txServiceBaseUrl}/v2/safes/${safeAddress}/multisig-transactions/?has_confirmations=true&nonce__gte=1`,
         method: 'get'
       })
     })
@@ -558,7 +559,7 @@ describe('Endpoint tests', () => {
         .expect(safeApiKit.getPendingTransactions(safeAddress, { currentNonce }))
         .to.be.eventually.deep.equals({ data: { success: true } })
       chai.expect(fetchData).to.have.been.calledWith({
-        url: `${txServiceBaseUrl}/v1/safes/${safeAddress}/multisig-transactions/?executed=false&nonce__gte=${currentNonce}`,
+        url: `${txServiceBaseUrl}/v2/safes/${safeAddress}/multisig-transactions/?executed=false&nonce__gte=${currentNonce}`,
         method: 'get'
       })
     })
@@ -569,7 +570,7 @@ describe('Endpoint tests', () => {
         .expect(safeApiKit.getPendingTransactions(eip3770SafeAddress, { currentNonce }))
         .to.be.eventually.deep.equals({ data: { success: true } })
       chai.expect(fetchData).to.have.been.calledWith({
-        url: `${txServiceBaseUrl}/v1/safes/${safeAddress}/multisig-transactions/?executed=false&nonce__gte=${currentNonce}`,
+        url: `${txServiceBaseUrl}/v2/safes/${safeAddress}/multisig-transactions/?executed=false&nonce__gte=${currentNonce}`,
         method: 'get'
       })
     })
@@ -579,7 +580,7 @@ describe('Endpoint tests', () => {
         .expect(safeApiKit.getAllTransactions(safeAddress))
         .to.be.eventually.deep.equals({ data: { success: true } })
       chai.expect(fetchData).to.have.been.calledWith({
-        url: `${txServiceBaseUrl}/v1/safes/${safeAddress}/all-transactions/`,
+        url: `${txServiceBaseUrl}/v2/safes/${safeAddress}/all-transactions/`,
         method: 'get'
       })
     })
@@ -589,7 +590,7 @@ describe('Endpoint tests', () => {
         .expect(safeApiKit.getAllTransactions(eip3770SafeAddress))
         .to.be.eventually.deep.equals({ data: { success: true } })
       chai.expect(fetchData).to.have.been.calledWith({
-        url: `${txServiceBaseUrl}/v1/safes/${safeAddress}/all-transactions/`,
+        url: `${txServiceBaseUrl}/v2/safes/${safeAddress}/all-transactions/`,
         method: 'get'
       })
     })
diff --git a/packages/api-kit/tests/utils/setupKits.ts b/packages/api-kit/tests/utils/setupKits.ts
index 09b3437d6..ff730b4f6 100644
--- a/packages/api-kit/tests/utils/setupKits.ts
+++ b/packages/api-kit/tests/utils/setupKits.ts
@@ -1,4 +1,5 @@
 import hre from 'hardhat'
+import dotenv from 'dotenv'
 import { BrowserProvider } from 'ethers'
 import { custom, createWalletClient } from 'viem'
 
@@ -6,6 +7,9 @@ import Safe, { SafeProviderConfig, Eip1193Provider } from '@safe-global/protocol
 import SafeApiKit from '@safe-global/api-kit/index'
 
 import config from './config'
+import path from 'path'
+
+dotenv.config({ path: path.join(__dirname, '../../.env') })
 
 type GetKits = {
   protocolKit: Safe
@@ -15,6 +19,7 @@ type GetKits = {
 type GetKitsOptions = {
   signer?: SafeProviderConfig['signer']
   txServiceUrl?: string
+  chainId?: bigint
   safeAddress: string
 }
 
@@ -53,8 +58,15 @@ export async function getProtocolKit({
   return protocolKit
 }
 
-export function getApiKit(txServiceUrl?: GetKitsOptions['txServiceUrl']): SafeApiKit {
-  const safeApiKit = new SafeApiKit({ chainId: config.CHAIN_ID, txServiceUrl })
+export function getApiKit(
+  txServiceUrl?: GetKitsOptions['txServiceUrl'],
+  chainId?: GetKitsOptions['chainId']
+): SafeApiKit {
+  const safeApiKit = new SafeApiKit({
+    chainId: chainId || config.CHAIN_ID,
+    apiKey: process.env.API_KEY || 'jwt-token',
+    txServiceUrl
+  })
 
   return safeApiKit
 }
diff --git a/packages/protocol-kit/package.json b/packages/protocol-kit/package.json
index ff3a1703a..a58b2ae67 100644
--- a/packages/protocol-kit/package.json
+++ b/packages/protocol-kit/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@safe-global/protocol-kit",
-  "version": "6.0.5",
+  "version": "6.1.0",
   "description": "SDK that facilitates the interaction with Safe Smart Accounts",
   "types": "dist/src/index.d.ts",
   "main": "dist/cjs/src/index.cjs",
@@ -79,9 +79,9 @@
     "tsconfig-paths": "^4.2.0"
   },
   "dependencies": {
-    "@safe-global/safe-deployments": "^1.37.34",
-    "@safe-global/safe-modules-deployments": "^2.2.9",
-    "@safe-global/types-kit": "^2.0.1",
+    "@safe-global/safe-deployments": "^1.37.35",
+    "@safe-global/safe-modules-deployments": "^2.2.10",
+    "@safe-global/types-kit": "^3.0.0",
     "abitype": "^1.0.2",
     "semver": "^7.7.1",
     "viem": "^2.21.8"
diff --git a/packages/protocol-kit/src/Safe.ts b/packages/protocol-kit/src/Safe.ts
index f979cdb1e..6311c4c0e 100644
--- a/packages/protocol-kit/src/Safe.ts
+++ b/packages/protocol-kit/src/Safe.ts
@@ -215,13 +215,21 @@ class Safe {
    * @throws "MultiSendCallOnly contract is not deployed on the current network"
    */
   async connect(config: ConnectSafeConfig): Promise<Safe> {
-    const { provider, signer, safeAddress, predictedSafe, isL1SafeSingleton, contractNetworks } =
-      config
+    const {
+      provider,
+      signer,
+      safeAddress,
+      predictedSafe,
+      isL1SafeSingleton,
+      contractNetworks,
+      onchainAnalytics
+    } = config
     const configProps: SafeConfigProps = {
       provider: provider || this.#safeProvider.provider,
       signer,
       isL1SafeSingleton: isL1SafeSingleton || this.#contractManager.isL1SafeSingleton,
-      contractNetworks: contractNetworks || this.#contractManager.contractNetworks
+      contractNetworks: contractNetworks || this.#contractManager.contractNetworks,
+      onchainAnalytics
     }
 
     // A new existing Safe is connected to the Signer
@@ -779,7 +787,7 @@ class Safe {
    * Adds the signature of the current signer to the Safe transaction object.
    *
    * @param safeTransaction - The Safe transaction to be signed
-   * @param signingMethod - Method followed to sign a transaction. Optional. Default value is "eth_sign"
+   * @param signingMethod - Method followed to sign a transaction. Optional. Default value is "eth_signTypedData_v4"
    * @param preimageSafeAddress - If the preimage is required, the address of the Safe that will be used to calculate the preimage
    * This field is mandatory for 1.3.0 and 1.4.1 contract versions Because the safe uses the old EIP-1271 interface which uses `bytes` instead of `bytes32` for the message
    * we need to use the pre-image of the message to calculate the message hash
@@ -1264,12 +1272,14 @@ class Safe {
       operation: serviceTransactionResponse.operation
     }
     const options = {
+      // TODO remove toString() in next major v7.0
       safeTxGas: serviceTransactionResponse.safeTxGas.toString(),
+      // TODO remove toString() in next major v7.0
       baseGas: serviceTransactionResponse.baseGas.toString(),
       gasPrice: serviceTransactionResponse.gasPrice,
       gasToken: serviceTransactionResponse.gasToken,
       refundReceiver: serviceTransactionResponse.refundReceiver,
-      nonce: serviceTransactionResponse.nonce
+      nonce: parseInt(serviceTransactionResponse.nonce, 10)
     }
     const safeTransaction = await this.createTransaction({
       transactions: [safeTransactionData],
diff --git a/packages/protocol-kit/src/utils/eip-3770/config.ts b/packages/protocol-kit/src/utils/eip-3770/config.ts
index ed43cc6c4..0fe72a216 100644
--- a/packages/protocol-kit/src/utils/eip-3770/config.ts
+++ b/packages/protocol-kit/src/utils/eip-3770/config.ts
@@ -103,6 +103,7 @@ export const networks: NetworkShortName[] = [
   { chainId: 690n, shortName: 'redstone' },
   { chainId: 747n, shortName: 'flow-mainnet' },
   { chainId: 787n, shortName: 'aca' },
+  { chainId: 842n, shortName: 'taratest' },
   { chainId: 919n, shortName: 'modesep' },
   { chainId: 938n, shortName: 'haust' },
   { chainId: 943n, shortName: 't4pls' },
@@ -359,6 +360,7 @@ export const networks: NetworkShortName[] = [
   { chainId: 200810n, shortName: 'btrt' },
   { chainId: 200901n, shortName: 'btr' },
   { chainId: 205205n, shortName: 'auroria' },
+  { chainId: 210425n, shortName: 'platon' },
   { chainId: 314159n, shortName: 'filecoin-calibration' },
   { chainId: 325000n, shortName: 'CampV2' },
   { chainId: 328527n, shortName: 'nal' },
@@ -391,6 +393,7 @@ export const networks: NetworkShortName[] = [
   { chainId: 978657n, shortName: 'treasure-ruby' },
   { chainId: 984122n, shortName: 'forma' },
   { chainId: 1501869n, shortName: 'water9' },
+  { chainId: 2206132n, shortName: 'platondev2' },
   { chainId: 2632500n, shortName: 'coti' },
   { chainId: 3441006n, shortName: 'mantaSepoliaTestnet' },
   { chainId: 4457845n, shortName: 'zero-sepolia' },
diff --git a/packages/protocol-kit/src/utils/getProtocolKitVersion.ts b/packages/protocol-kit/src/utils/getProtocolKitVersion.ts
index fc85a23ad..05c68a6c4 100644
--- a/packages/protocol-kit/src/utils/getProtocolKitVersion.ts
+++ b/packages/protocol-kit/src/utils/getProtocolKitVersion.ts
@@ -1 +1 @@
-export const getProtocolKitVersion = () => '6.0.5'
+export const getProtocolKitVersion = () => '6.1.0'
diff --git a/packages/protocol-kit/tests/e2e/offChainSignatures.test.ts b/packages/protocol-kit/tests/e2e/offChainSignatures.test.ts
index cccceaab6..d24ae72ff 100644
--- a/packages/protocol-kit/tests/e2e/offChainSignatures.test.ts
+++ b/packages/protocol-kit/tests/e2e/offChainSignatures.test.ts
@@ -283,11 +283,11 @@ describe('Off-chain signatures', () => {
         data: '0x',
         operation: 1,
         gasToken: '0x3333333333333333333333333333333333333333',
-        safeTxGas: 666,
-        baseGas: 111,
+        safeTxGas: '666',
+        baseGas: '111',
         gasPrice: '222',
         refundReceiver: '0x4444444444444444444444444444444444444444',
-        nonce: await safeSdk.getNonce(),
+        nonce: (await safeSdk.getNonce()).toString(),
         executionDate: '',
         submissionDate: '',
         modified: '',
@@ -298,12 +298,14 @@ describe('Off-chain signatures', () => {
         isExecuted: false,
         isSuccessful: false,
         ethGasPrice: '',
+        maxFeePerGas: null,
+        maxPriorityFeePerGas: null,
         gasUsed: 12345,
         fee: '12345',
         origin: '',
-        dataDecoded: '',
         confirmationsRequired: 2,
         proposer: '0x',
+        proposedByDelegate: null,
         confirmations: [
           {
             owner: '0x1111111111111111111111111111111111111111',
diff --git a/packages/relay-kit/package.json b/packages/relay-kit/package.json
index 79fcb278b..1fd8b822f 100644
--- a/packages/relay-kit/package.json
+++ b/packages/relay-kit/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@safe-global/relay-kit",
-  "version": "4.0.4",
+  "version": "4.0.5",
   "description": "SDK for Safe Smart Accounts with support for ERC-4337 and Relay",
   "types": "dist/src/index.d.ts",
   "main": "dist/cjs/src/index.cjs",
@@ -56,9 +56,9 @@
   },
   "dependencies": {
     "@gelatonetwork/relay-sdk": "^5.6.0",
-    "@safe-global/protocol-kit": "^6.0.5",
-    "@safe-global/safe-modules-deployments": "^2.2.9",
-    "@safe-global/types-kit": "^2.0.1",
+    "@safe-global/protocol-kit": "^6.1.0",
+    "@safe-global/safe-modules-deployments": "^2.2.10",
+    "@safe-global/types-kit": "^3.0.0",
     "semver": "^7.7.1",
     "viem": "^2.21.8"
   }
diff --git a/packages/relay-kit/src/packs/safe-4337/utils/getRelayKitVersion.ts b/packages/relay-kit/src/packs/safe-4337/utils/getRelayKitVersion.ts
index a10bfe9e4..ae5e67375 100644
--- a/packages/relay-kit/src/packs/safe-4337/utils/getRelayKitVersion.ts
+++ b/packages/relay-kit/src/packs/safe-4337/utils/getRelayKitVersion.ts
@@ -1 +1 @@
-export const getRelayKitVersion = () => '4.0.4'
+export const getRelayKitVersion = () => '4.0.5'
diff --git a/packages/sdk-starter-kit/package.json b/packages/sdk-starter-kit/package.json
index 1235d3ed6..126e465d4 100644
--- a/packages/sdk-starter-kit/package.json
+++ b/packages/sdk-starter-kit/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@safe-global/sdk-starter-kit",
-  "version": "2.0.3",
+  "version": "3.0.0",
   "description": "SDK that provides the basic tools to interact with the Safe Smart Account.",
   "types": "dist/src/index.d.ts",
   "main": "dist/cjs/index.cjs",
@@ -45,10 +45,10 @@
     "access": "public"
   },
   "dependencies": {
-    "@safe-global/api-kit": "^3.0.2",
-    "@safe-global/protocol-kit": "^6.0.5",
-    "@safe-global/relay-kit": "^4.0.4",
-    "@safe-global/types-kit": "^2.0.1",
+    "@safe-global/api-kit": "^4.0.0",
+    "@safe-global/protocol-kit": "^6.1.0",
+    "@safe-global/relay-kit": "^4.0.5",
+    "@safe-global/types-kit": "^3.0.0",
     "viem": "^2.21.8"
   }
 }
diff --git a/packages/sdk-starter-kit/src/SafeClient.test.ts b/packages/sdk-starter-kit/src/SafeClient.test.ts
index c7657660d..89e8abad6 100644
--- a/packages/sdk-starter-kit/src/SafeClient.test.ts
+++ b/packages/sdk-starter-kit/src/SafeClient.test.ts
@@ -1,6 +1,5 @@
 import Safe, * as protocolKitModule from '@safe-global/protocol-kit'
 import SafeApiKit from '@safe-global/api-kit'
-
 import * as utils from './utils'
 import { SafeClient } from './SafeClient'
 import { MESSAGES, SafeClientTxStatus } from './constants'
@@ -46,7 +45,10 @@ describe('SafeClient', () => {
 
   beforeEach(() => {
     protocolKit = new Safe()
-    apiKit = new SafeApiKit({ chainId: 1n }) as jest.Mocked<SafeApiKit>
+    apiKit = new SafeApiKit({
+      chainId: 1n,
+      apiKey: 'apiKey'
+    }) as jest.Mocked<SafeApiKit>
 
     safeClient = new SafeClient(protocolKit, apiKit)
 
diff --git a/packages/sdk-starter-kit/src/extensions/messages/SafeMessageClient.test.ts b/packages/sdk-starter-kit/src/extensions/messages/SafeMessageClient.test.ts
index cd405f55d..1342202cf 100644
--- a/packages/sdk-starter-kit/src/extensions/messages/SafeMessageClient.test.ts
+++ b/packages/sdk-starter-kit/src/extensions/messages/SafeMessageClient.test.ts
@@ -33,7 +33,10 @@ describe('SafeClient', () => {
 
   beforeEach(() => {
     protocolKit = new Safe()
-    apiKit = new SafeApiKit({ chainId: 1n }) as jest.Mocked<SafeApiKit>
+    apiKit = new SafeApiKit({
+      chainId: 1n,
+      apiKey: 'apiKey'
+    }) as jest.Mocked<SafeApiKit>
     safeMessageClient = new SafeMessageClient(protocolKit, apiKit)
 
     apiKit.getMessage = jest.fn().mockResolvedValue(MESSAGE_RESPONSE)
diff --git a/packages/sdk-starter-kit/src/extensions/messages/offChainMessages.test.ts b/packages/sdk-starter-kit/src/extensions/messages/offChainMessages.test.ts
index ee40c1b27..f0f61875a 100644
--- a/packages/sdk-starter-kit/src/extensions/messages/offChainMessages.test.ts
+++ b/packages/sdk-starter-kit/src/extensions/messages/offChainMessages.test.ts
@@ -21,7 +21,10 @@ describe('onChainMessages', () => {
 
   beforeEach(() => {
     protocolKit = new Safe()
-    apiKit = new SafeApiKit({ chainId: 1n }) as jest.Mocked<SafeApiKit>
+    apiKit = new SafeApiKit({
+      chainId: 1n,
+      apiKey: 'apiKey'
+    }) as jest.Mocked<SafeApiKit>
     safeClient = new SafeClient(protocolKit, apiKit)
   })
 
diff --git a/packages/sdk-starter-kit/src/extensions/messages/onChainMessages.test.ts b/packages/sdk-starter-kit/src/extensions/messages/onChainMessages.test.ts
index 46b22d50c..8c1a4a3b9 100644
--- a/packages/sdk-starter-kit/src/extensions/messages/onChainMessages.test.ts
+++ b/packages/sdk-starter-kit/src/extensions/messages/onChainMessages.test.ts
@@ -22,7 +22,10 @@ describe('onChainMessages', () => {
 
   beforeEach(() => {
     protocolKit = new Safe()
-    apiKit = new SafeApiKit({ chainId: 1n }) as jest.Mocked<SafeApiKit>
+    apiKit = new SafeApiKit({
+      chainId: 1n,
+      apiKey: 'apiKey'
+    }) as jest.Mocked<SafeApiKit>
     safeClient = new SafeClient(protocolKit, apiKit)
   })
 
diff --git a/packages/sdk-starter-kit/src/extensions/safe-operations/SafeOperationClient.test.ts b/packages/sdk-starter-kit/src/extensions/safe-operations/SafeOperationClient.test.ts
index ad0440b8e..3ad03e761 100644
--- a/packages/sdk-starter-kit/src/extensions/safe-operations/SafeOperationClient.test.ts
+++ b/packages/sdk-starter-kit/src/extensions/safe-operations/SafeOperationClient.test.ts
@@ -64,7 +64,10 @@ describe('SafeOperationClient', () => {
     const bundlerClientMock = { send: jest.fn().mockResolvedValue('1') } as any
 
     protocolKit = new Safe()
-    apiKit = new SafeApiKit({ chainId: 1n }) as jest.Mocked<SafeApiKit>
+    apiKit = new SafeApiKit({
+      chainId: 1n,
+      apiKey: 'apiKey'
+    }) as jest.Mocked<SafeApiKit>
     safe4337Pack = new Safe4337Pack({
       protocolKit,
       bundlerClient: bundlerClientMock,
diff --git a/packages/sdk-starter-kit/src/extensions/safe-operations/safeOperations.test.ts b/packages/sdk-starter-kit/src/extensions/safe-operations/safeOperations.test.ts
index f57072da8..67d83771d 100644
--- a/packages/sdk-starter-kit/src/extensions/safe-operations/safeOperations.test.ts
+++ b/packages/sdk-starter-kit/src/extensions/safe-operations/safeOperations.test.ts
@@ -29,7 +29,10 @@ describe('safeOperations', () => {
 
   beforeEach(() => {
     protocolKit = new Safe()
-    apiKit = new SafeApiKit({ chainId: 1n }) as jest.Mocked<SafeApiKit>
+    apiKit = new SafeApiKit({
+      chainId: 1n,
+      apiKey: 'apiKey'
+    }) as jest.Mocked<SafeApiKit>
     safeClient = new SafeClient(protocolKit, apiKit)
   })
 
diff --git a/packages/sdk-starter-kit/src/index.test.ts b/packages/sdk-starter-kit/src/index.test.ts
index 45b82d586..13837155d 100644
--- a/packages/sdk-starter-kit/src/index.test.ts
+++ b/packages/sdk-starter-kit/src/index.test.ts
@@ -6,12 +6,14 @@ const SAFE_OWNERS = [
   '0x9cCBDE03eDd71074ea9c49e413FA9CDfF16D263B',
   '0x56e2C102c664De6DfD7315d12c0178b61D16F171'
 ]
+const API_KEY = 'apiKey'
 
 describe('createSafeClient', () => {
   it('should create a Safe client instance', async () => {
     const safeClient = await createSafeClient({
       provider: RPC_URL,
-      safeAddress: SAFE_ADDRESS
+      safeAddress: SAFE_ADDRESS,
+      apiKey: API_KEY
     })
 
     const safeAddress = await safeClient.getAddress()
@@ -26,7 +28,8 @@ describe('createSafeClient', () => {
   it('should allow to extend the client several times and accumulating methods', async () => {
     const safeClient1 = await createSafeClient({
       provider: RPC_URL,
-      safeAddress: SAFE_ADDRESS
+      safeAddress: SAFE_ADDRESS,
+      apiKey: API_KEY
     })
 
     const safeClient2 = safeClient1.extend(offChainMessages())
diff --git a/packages/sdk-starter-kit/src/index.ts b/packages/sdk-starter-kit/src/index.ts
index 28f4cbd50..22567a7e0 100644
--- a/packages/sdk-starter-kit/src/index.ts
+++ b/packages/sdk-starter-kit/src/index.ts
@@ -98,7 +98,11 @@ async function getApiKitInstance(
 ): Promise<SafeApiKit> {
   const chainId = await protocolKit.getChainId()
 
-  return new SafeApiKit({ chainId, txServiceUrl: config.txServiceUrl })
+  return new SafeApiKit({
+    chainId,
+    apiKey: config.apiKey,
+    txServiceUrl: config.txServiceUrl
+  })
 }
 
 export * from './types'
diff --git a/packages/sdk-starter-kit/src/types.ts b/packages/sdk-starter-kit/src/types.ts
index 839a8ac55..4d0509674 100644
--- a/packages/sdk-starter-kit/src/types.ts
+++ b/packages/sdk-starter-kit/src/types.ts
@@ -59,6 +59,7 @@ export type PredictedSafeConfig = {
 export type SdkStarterKitRootConfig = {
   provider: SafeProvider['provider']
   signer?: SafeProvider['signer']
+  apiKey?: string
   txServiceUrl?: string
 }
 
diff --git a/packages/testing-kit/package.json b/packages/testing-kit/package.json
index 85dac065b..9906aa119 100644
--- a/packages/testing-kit/package.json
+++ b/packages/testing-kit/package.json
@@ -49,7 +49,7 @@
     "@openzeppelin/contracts": "^2.5.1",
     "@safe-global/safe-contracts-v1.4.1": "npm:@safe-global/safe-contracts@1.4.1",
     "@safe-global/safe-passkey": "0.2.0",
-    "@safe-global/types-kit": "^2.0.1",
+    "@safe-global/types-kit": "^3.0.0",
     "@types/semver": "^7.7.0",
     "hardhat": "^2.22.19",
     "hardhat-deploy": "^0.12.4",
diff --git a/packages/types-kit/package.json b/packages/types-kit/package.json
index 82ae083f9..fa8b4d275 100644
--- a/packages/types-kit/package.json
+++ b/packages/types-kit/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@safe-global/types-kit",
-  "version": "2.0.1",
+  "version": "3.0.0",
   "description": "Types for use with the Safe Core SDK packages",
   "types": "dist/src/index.d.ts",
   "main": "dist/cjs/index.cjs",
diff --git a/packages/types-kit/src/types.ts b/packages/types-kit/src/types.ts
index 7f4964632..d78e4227c 100644
--- a/packages/types-kit/src/types.ts
+++ b/packages/types-kit/src/types.ts
@@ -248,11 +248,11 @@ export type SafeMultisigTransactionResponse = {
   readonly data?: string
   readonly operation: number
   readonly gasToken: string
-  readonly safeTxGas: number
-  readonly baseGas: number
+  readonly safeTxGas: string
+  readonly baseGas: string
   readonly gasPrice: string
   readonly refundReceiver?: string
-  readonly nonce: number
+  readonly nonce: string
   readonly executionDate: string | null
   readonly submissionDate: string
   readonly modified: string
diff --git a/playground/api-kit/.env-sample b/playground/api-kit/.env-sample
new file mode 100644
index 000000000..6dae7996f
--- /dev/null
+++ b/playground/api-kit/.env-sample
@@ -0,0 +1,12 @@
+# Set the chain ID where the playgrounds will be used
+CHAIN_ID=11155111
+# Set the preferred RPC url
+RPC_URL='https://sepolia.gateway.tenderly.co'
+# API key
+API_KEY=
+# Private key of the account used to sign
+SIGNER_ADDRESS_PRIVATE_KEY=
+# Safe address to use with the playgrounds where Safe must already exist
+SAFE_ADDRESS=0x...
+# Safe tx hash to use with the playgrounds where the transaction is already created
+SAFE_TX_HASH=0x...
\ No newline at end of file
diff --git a/playground/api-kit/confirm-transaction.ts b/playground/api-kit/confirm-transaction.ts
index 0ff04eef2..4cceabb9e 100644
--- a/playground/api-kit/confirm-transaction.ts
+++ b/playground/api-kit/confirm-transaction.ts
@@ -1,40 +1,35 @@
+import * as dotenv from 'dotenv'
 import Safe from '@safe-global/protocol-kit'
 import SafeApiKit from '@safe-global/api-kit'
 
-// This file can be used to play around with the Safe Core SDK
-
-interface Config {
-  CHAIN_ID: bigint
-  RPC_URL: string
-  SIGNER_ADDRESS_PRIVATE_KEY: string
-  SAFE_ADDRESS: string
-  SAFE_TX_HASH: string
-}
-
-// Adjust the configuration with your own input parameters before running the script
-const config: Config = {
-  CHAIN_ID: 11155111n,
-  RPC_URL: 'https://sepolia.gateway.tenderly.co',
-  SIGNER_ADDRESS_PRIVATE_KEY: '<SIGNER_ADDRESS_PRIVATE_KEY>',
-  SAFE_ADDRESS: '<SAFE_ADDRESS>',
-  SAFE_TX_HASH: '<SAFE_TX_HASH>'
-}
+dotenv.config({ path: './playground/api-kit/.env' })
+// Load environment variables from ./.env file
+// Follow .env-sample as an example to create your own file
+const {
+  CHAIN_ID = 11155111,
+  RPC_URL = '',
+  API_KEY = '',
+  SIGNER_ADDRESS_PRIVATE_KEY = '',
+  SAFE_ADDRESS = '',
+  SAFE_TX_HASH = ''
+} = process.env
 
 async function main() {
   // Create Safe instance
   const protocolKit = await Safe.init({
-    provider: config.RPC_URL,
-    signer: config.SIGNER_ADDRESS_PRIVATE_KEY,
-    safeAddress: config.SAFE_ADDRESS
+    provider: RPC_URL,
+    signer: SIGNER_ADDRESS_PRIVATE_KEY,
+    safeAddress: SAFE_ADDRESS
   })
 
   // Create Safe API Kit instance
   const apiKit = new SafeApiKit({
-    chainId: config.CHAIN_ID
+    chainId: BigInt(CHAIN_ID),
+    apiKey: API_KEY
   })
 
   // Get the transaction
-  const safeTransaction = await apiKit.getTransaction(config.SAFE_TX_HASH)
+  const safeTransaction = await apiKit.getTransaction(SAFE_TX_HASH || '')
   const safeTxHash = safeTransaction.safeTxHash
   const signature = await protocolKit.signHash(safeTxHash)
 
@@ -42,7 +37,7 @@ async function main() {
   const signatureResponse = await apiKit.confirmTransaction(safeTxHash, signature.data)
 
   const signerAddress = await protocolKit.getSafeProvider().getSignerAddress()
-  console.log('Added a new signature to transaction with safeTxGas:', config.SAFE_TX_HASH)
+  console.log('Added a new signature to transaction with safeTxGas:', SAFE_TX_HASH)
   console.log('- Signer:', signerAddress)
   console.log('- Signer signature:', signatureResponse.signature)
 }
diff --git a/playground/api-kit/execute-transaction.ts b/playground/api-kit/execute-transaction.ts
index 498bca9cc..c250e680b 100644
--- a/playground/api-kit/execute-transaction.ts
+++ b/playground/api-kit/execute-transaction.ts
@@ -1,42 +1,37 @@
+import * as dotenv from 'dotenv'
 import { Hash } from 'viem'
 import { waitForTransactionReceipt } from 'viem/actions'
 import Safe from '@safe-global/protocol-kit'
 import SafeApiKit from '@safe-global/api-kit'
 
-// This file can be used to play around with the Safe Core SDK
-
-interface Config {
-  CHAIN_ID: bigint
-  RPC_URL: string
-  SIGNER_ADDRESS_PRIVATE_KEY: string
-  SAFE_ADDRESS: string
-  SAFE_TX_HASH: string
-}
-
-// Adjust the configuration with your own input parameters before running the script
-const config: Config = {
-  CHAIN_ID: 11155111n,
-  RPC_URL: 'https://sepolia.gateway.tenderly.co',
-  SIGNER_ADDRESS_PRIVATE_KEY: '<SIGNER_ADDRESS_PRIVATE_KEY>',
-  SAFE_ADDRESS: '<SAFE_ADDRESS>',
-  SAFE_TX_HASH: '<SAFE_TX_HASH>'
-}
+dotenv.config({ path: './playground/api-kit/.env' })
+// Load environment variables from ./.env file
+// Follow .env-sample as an example to create your own file
+const {
+  CHAIN_ID = 11155111,
+  RPC_URL = '',
+  API_KEY = '',
+  SIGNER_ADDRESS_PRIVATE_KEY = '',
+  SAFE_ADDRESS = '',
+  SAFE_TX_HASH = ''
+} = process.env
 
 async function main() {
   // Create Safe instance
   const protocolKit = await Safe.init({
-    provider: config.RPC_URL,
-    signer: config.SIGNER_ADDRESS_PRIVATE_KEY,
-    safeAddress: config.SAFE_ADDRESS
+    provider: RPC_URL,
+    signer: SIGNER_ADDRESS_PRIVATE_KEY,
+    safeAddress: SAFE_ADDRESS
   })
 
   // Create Safe API Kit instance
   const apiKit = new SafeApiKit({
-    chainId: config.CHAIN_ID
+    chainId: BigInt(CHAIN_ID),
+    apiKey: API_KEY || ''
   })
 
   // Get the transaction
-  const safeTransaction = await apiKit.getTransaction(config.SAFE_TX_HASH)
+  const safeTransaction = await apiKit.getTransaction(SAFE_TX_HASH)
   const isTxExecutable = await protocolKit.isValidTransaction(safeTransaction)
 
   if (isTxExecutable) {
diff --git a/playground/api-kit/propose-transaction.ts b/playground/api-kit/propose-transaction.ts
index 2e3570d85..08fc4ce4f 100644
--- a/playground/api-kit/propose-transaction.ts
+++ b/playground/api-kit/propose-transaction.ts
@@ -1,40 +1,36 @@
+import * as dotenv from 'dotenv'
 import Safe from '@safe-global/protocol-kit'
 import SafeApiKit from '@safe-global/api-kit'
 import { OperationType, SafeTransactionDataPartial } from '@safe-global/types-kit'
 
-// This file can be used to play around with the Safe Core SDK
-
-interface Config {
-  CHAIN_ID: bigint
-  RPC_URL: string
-  SIGNER_ADDRESS_PRIVATE_KEY: string
-  SAFE_ADDRESS: string
-}
-
-// Adjust the configuration with your own input parameters before running the script
-const config: Config = {
-  CHAIN_ID: 11155111n,
-  RPC_URL: 'https://sepolia.gateway.tenderly.co',
-  SIGNER_ADDRESS_PRIVATE_KEY: '<SIGNER_ADDRESS_PRIVATE_KEY>',
-  SAFE_ADDRESS: '<SAFE_ADDRESS>'
-}
+dotenv.config({ path: './playground/api-kit/.env' })
+// Load environment variables from ./.env file
+// Follow .env-sample as an example to create your own file
+const {
+  CHAIN_ID = 11155111,
+  RPC_URL = '',
+  API_KEY = '',
+  SIGNER_ADDRESS_PRIVATE_KEY = '',
+  SAFE_ADDRESS = ''
+} = process.env
 
 async function main() {
   // Create Safe instance
   const protocolKit = await Safe.init({
-    provider: config.RPC_URL,
-    signer: config.SIGNER_ADDRESS_PRIVATE_KEY,
-    safeAddress: config.SAFE_ADDRESS
+    provider: RPC_URL,
+    signer: SIGNER_ADDRESS_PRIVATE_KEY,
+    safeAddress: SAFE_ADDRESS
   })
 
   // Create Safe API Kit instance
   const apiKit = new SafeApiKit({
-    chainId: config.CHAIN_ID
+    chainId: BigInt(CHAIN_ID),
+    apiKey: API_KEY || ''
   })
 
   // Create transaction
   const safeTransactionData: SafeTransactionDataPartial = {
-    to: config.SAFE_ADDRESS,
+    to: SAFE_ADDRESS,
     value: '1', // 1 wei
     data: '0x',
     operation: OperationType.Call
@@ -49,14 +45,14 @@ async function main() {
 
   // Propose transaction to the service
   await apiKit.proposeTransaction({
-    safeAddress: config.SAFE_ADDRESS,
+    safeAddress: SAFE_ADDRESS,
     safeTransactionData: safeTransaction.data,
     safeTxHash,
     senderAddress: signerAddress,
     senderSignature: signature.data
   })
 
-  console.log('Proposed a transaction with Safe:', config.SAFE_ADDRESS)
+  console.log('Proposed a transaction with Safe:', SAFE_ADDRESS)
   console.log('- safeTxHash:', safeTxHash)
   console.log('- Sender:', signerAddress)
   console.log('- Sender signature:', signature.data)
diff --git a/playground/relay-kit/.env-sample b/playground/relay-kit/.env-sample
index 71c76387e..3002d9db9 100644
--- a/playground/relay-kit/.env-sample
+++ b/playground/relay-kit/.env-sample
@@ -12,4 +12,6 @@ CHAIN_ID=11155111
 BUNDLER_URL=
 PAYMASTER_URL=
 # Set the sponsor policy in case you are using one to test the sponsor user operations related playgrounds
-SPONSORSHIP_POLICY_ID=
\ No newline at end of file
+SPONSORSHIP_POLICY_ID=
+# Api key to use Transaction Service
+API_KEY=
\ No newline at end of file
diff --git a/playground/relay-kit/userop-api-kit-interoperability.ts b/playground/relay-kit/userop-api-kit-interoperability.ts
index 39e0b7950..a3940923d 100644
--- a/playground/relay-kit/userop-api-kit-interoperability.ts
+++ b/playground/relay-kit/userop-api-kit-interoperability.ts
@@ -1,3 +1,4 @@
+import * as dotenv from 'dotenv'
 import { privateKeyToAddress } from 'viem/accounts'
 import SafeApiKit from '@safe-global/api-kit'
 import { Safe4337Pack } from '@safe-global/relay-kit'
@@ -15,8 +16,15 @@ const RPC_URL = 'https://ethereum-sepolia-rpc.publicnode.com'
 const BUNDLER_URL = 'https://...'
 const PAYMASTER_URL = 'https://...'
 
+dotenv.config({ path: './playground/relay-kit/.env' })
+
+const { API_KEY } = process.env
+
 async function main() {
-  const apiKit = new SafeApiKit({ chainId: BigInt(CHAIN_ID) })
+  const apiKit = new SafeApiKit({
+    chainId: BigInt(CHAIN_ID),
+    apiKey: API_KEY || ''
+  })
 
   let safe4337Pack = await Safe4337Pack.init({
     provider: RPC_URL,
diff --git a/yarn.lock b/yarn.lock
index 655f5e989..60d62b408 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1826,17 +1826,17 @@
   resolved "https://registry.yarnpkg.com/@safe-global/safe-contracts/-/safe-contracts-1.4.1.tgz#82605342f3289dc6b99818f599a3409ec2cb3fdc"
   integrity sha512-fP1jewywSwsIniM04NsqPyVRFKPMAuirC3ftA/TA4X3Zc5EnwQp/UCJUU2PL/37/z/jMo8UUaJ+pnFNWmMU7dQ==
 
-"@safe-global/safe-deployments@^1.37.34":
-  version "1.37.34"
-  resolved "https://registry.yarnpkg.com/@safe-global/safe-deployments/-/safe-deployments-1.37.34.tgz#e3061327c12d73869a48acddb4742b2c2cf7c2b0"
-  integrity sha512-ynBFymugc3sZJ63NZuUuRYjjp5LIVPJqt/kJV/lnB0nh0JeUjX+W7NPNTjO6dxxdIi5p547pEaLKYKnaS4pTCQ==
+"@safe-global/safe-deployments@^1.37.35":
+  version "1.37.35"
+  resolved "https://registry.yarnpkg.com/@safe-global/safe-deployments/-/safe-deployments-1.37.35.tgz#d1516a4c571fc9409e601b58330f50d7c5526242"
+  integrity sha512-ICZ4VgvUwDlr0lu5ZfGwcj3igm3b2jopnMBw9UweT/a5ezGKu+3p8j2spxjUwhqo5eixIXH1R8yjHI7mp1LISQ==
   dependencies:
     semver "^7.6.2"
 
-"@safe-global/safe-modules-deployments@^2.2.9":
-  version "2.2.9"
-  resolved "https://registry.yarnpkg.com/@safe-global/safe-modules-deployments/-/safe-modules-deployments-2.2.9.tgz#f1575863b5e62fcb3c6df4d1e480c3c9b249ba15"
-  integrity sha512-3brLLX4RkLlH2vB+1CgGo1iA73kckmPpgroTLaweZnysr1lKHqpqY0VAA3gmjHq1Qiq1Cx0fccDHk3c2rqRfsw==
+"@safe-global/safe-modules-deployments@^2.2.10":
+  version "2.2.10"
+  resolved "https://registry.yarnpkg.com/@safe-global/safe-modules-deployments/-/safe-modules-deployments-2.2.10.tgz#b33a7b1e5279550664214b3c16930d106b6d409c"
+  integrity sha512-xEOOqSt4zqSPEU4VWgQZmjXbsgFtXOHsz34af8hx7WBLoVKUZ3umOuSjBYb0qBOY4FiQWkgGYsvJJRQjA1ESBA==
 
 "@safe-global/safe-passkey@0.2.0":
   version "0.2.0"
@@ -8426,11 +8426,6 @@ undici-types@~6.19.2:
   resolved "https://registry.yarnpkg.com/undici-types/-/undici-types-6.19.8.tgz#35111c9d1437ab83a7cdc0abae2f26d88eda0a02"
   integrity sha512-ve2KP6f/JnbPBFyobGHuerC9g1FYGn/F8n1LWTwNxCEzd6IfqTwUQcNXgEtmmQ6DlRrC1hrSrBnCZPokRrDHjw==
 
-undici-types@~6.20.0:
-  version "6.20.0"
-  resolved "https://registry.yarnpkg.com/undici-types/-/undici-types-6.20.0.tgz#8171bf22c1f588d1554d55bf204bc624af388433"
-  integrity sha512-Ny6QZ2Nju20vw1SRHe3d9jVu6gJ+4e3+MMpqu7pqE5HT6WsTSlce++GQmK5UXS8mzV8DSYHrQH+Xrf2jVcuKNg==
-
 undici-types@~6.21.0:
   version "6.21.0"
   resolved "https://registry.yarnpkg.com/undici-types/-/undici-types-6.21.0.tgz#691d00af3909be93a7faa13be61b3a5b50ef12cb"