Hyperliquid API TypeScript SDK

Unofficial Hyperliquid API SDK for all major JS runtimes, written in TypeScript and provided with tests.

Features

• 🖋️ Typed: Source code is 100% TypeScript.
• 🧪 Tested: Good code coverage and type-safe API responses.
• 📦 Minimal dependencies: A few small trusted dependencies.
• 🌐 Cross-Environment Support: Compatible with all major JS runtimes.
• 🔧 Integratable: Easy to use with viem, ethers and other wallet libraries.
• 📚 Documented: JSDoc annotations with usage examples in source code.

Installation

Note

While this library is in TypeScript, it can also be used in JavaScript and there is support for ESM/CommonJS.

Node.js (choose your package manager)

npm i @nktkas/hyperliquid

pnpm add @nktkas/hyperliquid

yarn add @nktkas/hyperliquid

Deno

deno add jsr:@nktkas/hyperliquid

Quick Start

import * as hl from "@nktkas/hyperliquid";

const transport = new hl.HttpTransport();
const infoClient = new hl.InfoClient({ transport });

const openOrders = await infoClient.openOrders({ user: "0x..." }); // Change to your address

import * as hl from "@nktkas/hyperliquid";
import { privateKeyToAccount } from "viem/accounts";

const wallet = privateKeyToAccount("0x..."); // Your private key

const transport = new hl.HttpTransport();
const exchClient = new hl.ExchangeClient({ wallet, transport });

const result = await exchClient.order({
    orders: [{
        a: 0, // Asset index
        b: true, // Buy order
        p: "30000", // Price
        s: "0.1", // Size
        r: false, // Not reduce-only
        t: {
            limit: {
                tif: "Gtc", // Good-til-cancelled
            },
        },
    }],
    grouping: "na", // No grouping orders
});

import * as hl from "@nktkas/hyperliquid";

const transport = new hl.WebSocketTransport();
const subsClient = new hl.SubscriptionClient({ transport });

const sub = await subsClient.allMids((event) => {
    console.log(event);
});

await sub.unsubscribe(); // Unsubscribe from the event

Usage

1) Initialize Transport

First, choose and configure your transport layer (more details in the API Reference):

import * as hl from "@nktkas/hyperliquid";

// HTTP Transport
const httpTransport = new hl.HttpTransport(); // Accepts optional parameters

// WebSocket Transport
const wsTransport = new hl.WebSocketTransport(); // Accepts optional parameters

2) Initialize Client

Next, initialize a client with the transport layer (more details in the API Reference):

Create InfoClient

import * as hl from "@nktkas/hyperliquid";

const transport = new hl.HttpTransport(); // or WebSocketTransport
const infoClient = new hl.InfoClient({ transport });

Create ExchangeClient

import * as hl from "@nktkas/hyperliquid";
import { createWalletClient, custom } from "viem";
import { privateKeyToAccount } from "viem/accounts";
import { ethers } from "ethers";

const transport = new hl.HttpTransport(); // or WebSocketTransport

// 1. Using Viem with private key
const viemAccount = privateKeyToAccount("0x...");
const ExchangeClient_Viem = new hl.ExchangeClient({ wallet: viemAccount, transport });

// 2. Using Ethers (or Ethers V5) with private key
const ethersWallet = new ethers.Wallet("0x...");
const ExchangeClient_Ethers = new hl.ExchangeClient({ wallet: ethersWallet, transport });

// 3. Using external wallet (e.g. MetaMask) via Viem
const [account] = await window.ethereum.request({ method: "eth_requestAccounts" });
const externalWallet = createWalletClient({ account, transport: custom(window.ethereum) });
const ExchangeClient_ViemMetamask = new hl.ExchangeClient({ wallet: externalWallet, transport });

// 4. Using external wallet (e.g. MetaMask) via `window.ethereum` directly
const ExchangeClient_WindowMetamask = new hl.ExchangeClient({ wallet: window.ethereum, transport });

Create SubscriptionClient

import * as hl from "@nktkas/hyperliquid";

const transport = new hl.WebSocketTransport(); // only WebSocketTransport
const subsClient = new hl.SubscriptionClient({ transport });

3) Use Client

Finally, use client methods to interact with the Hyperliquid API (more details in the API Reference):

Example of using an InfoClient

import * as hl from "@nktkas/hyperliquid";

const transport = new hl.HttpTransport();
const infoClient = new hl.InfoClient({ transport });

// L2 Book
const l2Book = await infoClient.l2Book({ coin: "BTC" });

// Account clearinghouse state
const clearinghouseState = await infoClient.clearinghouseState({ user: "0x..." });

// Open orders
const openOrders = await infoClient.openOrders({ user: "0x..." });

Example of using an ExchangeClient

import * as hl from "@nktkas/hyperliquid";
import { privateKeyToAccount } from "viem/accounts";

const account = privateKeyToAccount("0x...");
const transport = new hl.HttpTransport();
const exchClient = new hl.ExchangeClient({ wallet: account, transport });

// Place an orders
const result = await exchClient.order({
    orders: [{
        a: 0,
        b: true,
        p: "30000",
        s: "0.1",
        r: false,
        t: {
            limit: {
                tif: "Gtc",
            },
        },
    }],
    grouping: "na",
});

// Approve an agent
const result = await exchClient.approveAgent({
    agentAddress: "0x...",
    agentName: "agentName",
});

// Withdraw funds
const result = await exchClient.withdraw3({
    destination: account.address,
    amount: "100",
});

Example of using a SubscriptionClient

import * as hl from "@nktkas/hyperliquid";

const transport = new hl.WebSocketTransport();
const subsClient = new hl.SubscriptionClient({ transport });

// L2 Book updates
await subsClient.l2Book({ coin: "BTC" }, (data) => {
    console.log(data);
});

// User fills
await subsClient.userFills({ user: "0x..." }, (data) => {
    console.log(data);
});

// Explorer block updates
await subsClient.explorerBlock((data) => {
    console.log(data);
});

API Reference

Clients

A Client provides access to the Hyperliquid API endpoints.

Info Client

An Info Client which provides access to Info API and Explorer API, such as l2Book and clearinghouseState.

The Info Client class sets up with a given Transport.

class InfoClient {
    constructor(args: {
        transport: HttpTransport | WebSocketTransport;
    });

    // Market
    allMids(): Promise<AllMids>;
    candleSnapshot(args: CandleSnapshotParameters): Promise<Candle[]>;
    fundingHistory(args: FundingHistoryParameters): Promise<FundingHistory[]>;
    l2Book(args: L2BookParameters): Promise<Book>;
    meta(): Promise<PerpsMeta>;
    metaAndAssetCtxs(): Promise<PerpsMetaAndAssetCtxs>;
    perpDeployAuctionStatus(): Promise<DeployAuctionStatus>;
    perpDexs(): Promise<(PerpDex | null)[]>;
    perpsAtOpenInterestCap(): Promise<string[]>;
    predictedFundings(): Promise<PredictedFunding[]>;
    spotDeployState(args: SpotDeployStateParameters): Promise<SpotDeployState>;
    spotMeta(): Promise<SpotMeta>;
    spotMetaAndAssetCtxs(): Promise<SpotMetaAndAssetCtxs>;
    tokenDetails(args: TokenDetailsParameters): Promise<TokenDetails>;

    // Account
    clearinghouseState(args: ClearinghouseStateParameters): Promise<PerpsClearinghouseState>;
    extraAgents(args: ExtraAgentsParameters): Promise<ExtraAgent[]>;
    isVip(args: IsVipParameters): Promise<boolean>;
    legalCheck(args: LegalCheckParameters): Promise<LegalCheck>;
    maxBuilderFee(args: MaxBuilderFeeParameters): Promise<number>;
    portfolio(args: PortfolioParameters): Promise<PortfolioPeriods>;
    preTransferCheck(args: PreTransferCheckParameters): Promise<PreTransferCheck>;
    referral(args: ReferralParameters): Promise<Referral>;
    spotClearinghouseState(args: SpotClearinghouseStateParameters): Promise<SpotClearinghouseState>;
    subAccounts(args: SubAccountsParameters): Promise<SubAccount[] | null>;
    userFees(args: UserFeesParameters): Promise<UserFees>;
    userFunding(args: UserFundingParameters): Promise<UserFundingUpdate[]>;
    userNonFundingLedgerUpdates(args: UserNonFundingLedgerUpdatesParameters): Promise<UserNonFundingLedgerUpdate[]>;
    userRateLimit(args: UserRateLimitParameters): Promise<UserRateLimit>;
    userRole(args: UserRoleParameters): Promise<UserRole>;
    userToMultiSigSigners(args: UserToMultiSigSignersParameters): Promise<MultiSigSigners | null>;

    // Order
    frontendOpenOrders(args: FrontendOpenOrdersParameters): Promise<FrontendOrder[]>;
    historicalOrders(args: HistoricalOrdersParameters): Promise<OrderStatus<FrontendOrder>[]>;
    openOrders(args: OpenOrdersParameters): Promise<Order[]>;
    orderStatus(args: OrderStatusParameters): Promise<OrderLookup>;
    twapHistory(args: TwapHistoryParameters): Promise<TwapHistory[]>;
    userFills(args: UserFillsParameters): Promise<Fill[]>;
    userFillsByTime(args: UserFillsByTimeParameters): Promise<Fill[]>;
    userTwapSliceFills(args: UserTwapSliceFillsParameters): Promise<TwapSliceFill[]>;
    userTwapSliceFillsByTime(args: UserTwapSliceFillsByTimeParameters): Promise<TwapSliceFill[]>;

    // Staking
    delegations(args: DelegationsParameters): Promise<Delegation[]>;
    delegatorHistory(args: DelegatorHistoryParameters): Promise<DelegatorUpdate[]>;
    delegatorRewards(args: DelegatorRewardsParameters): Promise<DelegatorReward[]>;
    delegatorSummary(args: DelegatorSummaryParameters): Promise<DelegatorSummary>;
    validatorSummaries(): Promise<ValidatorSummary[]>;

    // Vault
    userVaultEquities(args: UserVaultEquitiesParameters): Promise<VaultEquity[]>;
    vaultDetails(args: VaultDetailsParameters): Promise<VaultDetails | null>;
    vaultSummaries(): Promise<VaultSummary[]>;

    // Explorer
    blockDetails(args: BlockDetailsParameters): Promise<BlockDetails>;
    txDetails(args: TxDetailsParameters): Promise<TxDetails>;
    userDetails(args: UserDetailsParameters): Promise<TxDetails[]>;
}

Exchange Client

An Exchange Client which provides access to Exchange API, such as order and withdraw3.

The Exchange Client class sets up with a given Transport and a wallet instance, which can be a viem, ethers.js or other wallet libraries.

class ExchangeClient {
    constructor(args: {
        transport: HttpTransport | WebSocketTransport;
        wallet:
            | AbstractViemWalletClient // viem
            | AbstractEthersSigner // ethers
            | AbstractEthersV5Signer // ethers v5
            | AbstractExtendedViemWalletClient // privy
            | AbstractWindowEthereum; // window.ethereum (EIP-1193) directly
        isTestnet?: boolean; // Whether to use testnet (default: false)
        defaultVaultAddress?: Hex; // Vault address used by default if not provided in method call
        signatureChainId?: Hex | (() => MaybePromise<Hex>); // Chain ID used for signing (default: trying to guess based on wallet and isTestnet)
        nonceManager?: () => MaybePromise<number>; // Function to get the next nonce (default: auto-incrementing Date.now())
    });

    // Order
    batchModify(args: BatchModifyParameters): Promise<OrderResponseSuccess>;
    cancel(args: CancelParameters): Promise<CancelResponseSuccess>;
    cancelByCloid(args: CancelByCloidParameters): Promise<CancelResponseSuccess>;
    modify(args: ModifyParameters): Promise<SuccessResponse>;
    order(args: OrderParameters): Promise<OrderResponseSuccess>;
    scheduleCancel(args?: ScheduleCancelParameters): Promise<SuccessResponse>;
    twapCancel(args: TwapCancelParameters): Promise<TwapCancelResponseSuccess>;
    twapOrder(args: TwapOrderParameters): Promise<TwapOrderResponseSuccess>;
    updateIsolatedMargin(args: UpdateIsolatedMarginParameters): Promise<SuccessResponse>;
    updateLeverage(args: UpdateLeverageParameters): Promise<SuccessResponse>;

    // Account
    approveAgent(args: ApproveAgentParameters): Promise<SuccessResponse>;
    approveBuilderFee(args: ApproveBuilderFeeParameters): Promise<SuccessResponse>;
    claimRewards(): Promise<SuccessResponse>;
    convertToMultiSigUser(args: ConvertToMultiSigUserParameters): Promise<SuccessResponse>;
    createSubAccount(args: CreateSubAccountParameters): Promise<CreateSubAccountResponse>;
    evmUserModify(args: EvmUserModifyParameters): Promise<SuccessResponse>;
    registerReferrer(args: RegisterReferrerParameters): Promise<SuccessResponse>;
    reserveRequestWeight(args: ReserveRequestWeightParameters): Promise<SuccessResponse>;
    setDisplayName(args: SetDisplayNameParameters): Promise<SuccessResponse>;
    setReferrer(args: SetReferrerParameters): Promise<SuccessResponse>;
    spotUser(args: SpotUserParameters): Promise<SuccessResponse>;

    // Transfers & Withdrawals
    perpDexClassTransfer(args: PerpDexClassTransferParameters): Promise<SuccessResponse>;
    spotSend(args: SpotSendParameters): Promise<SuccessResponse>;
    subAccountSpotTransfer(args: SubAccountSpotTransferParameters): Promise<SuccessResponse>;
    subAccountTransfer(args: SubAccountTransferParameters): Promise<SuccessResponse>;
    usdClassTransfer(args: UsdClassTransferParameters): Promise<SuccessResponse>;
    usdSend(args: UsdSendParameters): Promise<SuccessResponse>;
    withdraw3(args: Withdraw3Parameters): Promise<SuccessResponse>;

    // Staking
    cDeposit(args: CDepositParameters): Promise<SuccessResponse>;
    cWithdraw(args: CWithdrawParameters): Promise<SuccessResponse>;
    tokenDelegate(args: TokenDelegateParameters): Promise<SuccessResponse>;

    // Market
    perpDeploy(args: PerpDeployParameters): Promise<SuccessResponse>;
    spotDeploy(args: SpotDeployParameters): Promise<SuccessResponse>;

    // Vault
    createVault(args: CreateVaultParameters): Promise<CreateVaultResponse>;
    vaultDistribute(args: VaultDistributeParameters): Promise<SuccessResponse>;
    vaultModify(args: VaultModifyParameters): Promise<SuccessResponse>;
    vaultTransfer(args: VaultTransferParameters): Promise<SuccessResponse>;

    // Multi-Sign
    multiSig(args: MultiSigParameters): Promise<BaseExchangeResponse>;

    // Validator
    cSignerAction(args: CSignerActionParameters): Promise<SuccessResponse>;
    cValidatorAction(args: CValidatorActionParameters): Promise<SuccessResponse>;
}

Subscription Client

A Subscription Client which provides access to Subscriptions API, such as real-time updates for l2Book and userFills.

The Subscription Client class sets up with a given WebSocket Transport.

class SubscriptionClient {
    constructor(args: {
        transport: WebSocketTransport;
    });

    // Market
    activeAssetCtx(args: EventActiveAssetCtxParameters, listener: (data: WsActiveAssetCtx | WsActiveSpotAssetCtx) => void): Promise<Subscription>;
    activeAssetData(args: EventActiveAssetDataParameters, listener: (data: WsActiveAssetData) => void): Promise<Subscription>;
    allMids(listener: (data: WsAllMids) => void): Promise<Subscription>;
    bbo(args: EventBboParameters, listener: (data: WsBbo) => void): Promise<Subscription>;
    candle(args: EventCandleParameters, listener: (data: Candle) => void): Promise<Subscription>;
    l2Book(args: EventL2BookParameters, listener: (data: Book) => void): Promise<Subscription>;
    trades(args: EventTradesParameters, listener: (data: WsTrade[]) => void): Promise<Subscription>;

    // Account
    notification(args: EventNotificationParameters, listener: (data: WsNotification) => void): Promise<Subscription>;
    userEvents(args: EventUserEventsParameters, listener: (data: WsUserEvent) => void): Promise<Subscription>;
    userFundings(args: EventUserFundingsParameters, listener: (data: WsUserFundings) => void): Promise<Subscription>;
    userNonFundingLedgerUpdates(args: EventUserNonFundingLedgerUpdatesParameters, listener: (data: WsUserNonFundingLedgerUpdates) => void): Promise<Subscription>;
    webData2(args: EventWebData2Parameters, listener: (data: WsWebData2) => void): Promise<Subscription>;

    // Order
    orderUpdates(args: EventOrderUpdatesParameters, listener: (data: OrderStatus<Order>[]) => void): Promise<Subscription>;
    userFills(args: EventUserFillsParameters, listener: (data: WsUserFills) => void): Promise<Subscription>;
    userTwapHistory(args: EventUserTwapHistory, listener: (data: WsUserTwapHistory) => void): Promise<Subscription>;
    userTwapSliceFills(args: EventUserTwapSliceFills, listener: (data: WsUserTwapSliceFills) => void): Promise<Subscription>;

    // Explorer
    explorerBlock(listener: (data: WsBlockDetails[]) => void): Promise<Subscription>;
    explorerTx(listener: (data: TxDetails[]) => void): Promise<Subscription>;
}

Transports

A Client is instantiated with a Transport, which is the intermediary layer that is responsible for executing outgoing requests (ie. API calls and event listeners).

There are two types of Transports in the sdk:

HTTP Transport

A HTTP Transport that executes requests via a fetch API.

class HttpTransport {
    constructor(options?: {
        isTestnet?: boolean; // Whether to use testnet url (default: false)
        timeout?: number; // Request timeout in ms (default: 10_000)
        server?: { // Custom server URLs
            mainnet?: { api?: string | URL; rpc?: string | URL };
            testnet?: { api?: string | URL; rpc?: string | URL };
        };
        fetchOptions?: RequestInit; // A custom fetch options
        onRequest?: (request: Request) => MaybePromise<Request | void | null | undefined>; // A callback before request is sent
        onResponse?: (response: Response) => MaybePromise<Response | void | null | undefined>; // A callback after response is received
    });
}

WebSocket Transport

A WebSocket Transport that executes requests and subscribes to events via a WebSocket connection.

class WebSocketTransport {
    constructor(options?: {
        url?: string | URL; // WebSocket URL (default: "wss://api.hyperliquid.xyz/ws")
        timeout?: number; // Request timeout in ms (default: 10_000)
        keepAlive?: { // Keep-alive configuration
            interval?: number; // Ping interval in ms (default: 30_000)
            timeout?: number; // Pong timeout in ms (default: same as `timeout` for requests)
        };
        reconnect?: { // Reconnection policy configuration for closed connections
            maxRetries?: number; // Maximum number of reconnection attempts (default: 3)
            connectionTimeout?: number; // Connection timeout in ms (default: 10_000)
            connectionDelay?: number | ((attempt: number) => number | Promise<number>); // Delay between reconnection (default: Exponential backoff (max 10s))
            shouldReconnect?: (event: CloseEvent) => boolean | Promise<boolean>; // Custom reconnection logic (default: Always reconnect)
            messageBuffer?: MessageBufferStrategy; // Message buffering strategy between reconnection (default: FIFO buffer)
        };
        autoResubscribe?: boolean; // Whether to automatically resubscribe to events after reconnection (default: true)
    });
    ready(signal?: AbortSignal): Promise<void>;
    close(signal?: AbortSignal): Promise<void>;
}

Additional Import Points

/types

The import point gives access to all Hyperliquid-related types, including the base types on which class methods are based.

/signing

The import point gives access to functions that generate signatures for Hyperliquid transactions.

Examples

Cancel an order without a client

import { l1ActionSorter, signL1Action } from "@nktkas/hyperliquid/signing";
import { privateKeyToAccount } from "viem/accounts"; // or other wallet libraries

const wallet = privateKeyToAccount("0x..."); // your private key

const action = l1ActionSorter.cancel({ // sort action to ensure proper signature
    type: "cancel",
    cancels: [
        { a: 0, o: 12345 },
    ],
});
const nonce = Date.now();

const signature = await signL1Action({
    wallet,
    action,
    nonce,
    isTestnet: true, // Change to false for mainnet
});

const response = await fetch("https://api.hyperliquid-testnet.xyz/exchange", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ action, signature, nonce }),
});
const body = await response.json();

Approve an agent without a client

import { signUserSignedAction, userSignedActionEip712Types } from "@nktkas/hyperliquid/signing";
import { privateKeyToAccount } from "viem/accounts"; // or other wallet libraries

const wallet = privateKeyToAccount("0x..."); // your private key

const action = {
    type: "approveAgent",
    hyperliquidChain: "Testnet", // "Mainnet" or "Testnet"
    signatureChainId: "0x66eee",
    nonce: Date.now(),
    agentAddress: "0x...",
    agentName: "Agent",
};

const signature = await signUserSignedAction({
    wallet,
    action,
    types: userSignedActionEip712Types[action.type], // key order is important for a proper signature
    chainId: parseInt(action.signatureChainId, 16),
});

const response = await fetch("https://api.hyperliquid-testnet.xyz/exchange", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ action, signature, nonce: action.nonce }),
});
const body = await response.json();