Has anyone figure out How to Call Tools Listed by tools/list in n8n MCP via POST Request Call

[RichheadTech]

Hi My name is Rich,

So I've deployed the n8n MCP to Railway and am trying to interact with it via POST requests (using Postman). While I can successfully call the method tools/list and retrieve a list of tools like search_nodes, tools_documentation, n8n_list_workflows, etc., I’m unable to actually execute any of those tools.

For example:

✅ tools/list works and returns expected output (see Fig. A)

❌ But when I try tools/search_nodes, search_nodes, tools_documentation, or even generic wrappers like run, call_tool, or tools/call, I consistently get a "Method not found" error (see Fig. B)

It seems like:

The backend only exposes tools/list as a functional method

The other tools are returned as metadata, but none are callable

There appears to be no dispatcher method like run, tools/call, or call_tool implemented to execute a given tool from that list

Could you please clarify:

What is the correct method to actually call/execute one of the tools returned by tools/list?

Is there a specific dispatcher endpoint like tools/call or tool.run I should be using?

Or is there an additional configuration I need to enable in my MCP deployment for tool execution to work?

Appreciate any guidance you can provide to help me get this up and running.

Best regards,

FIG A:

FIG B: