LetX MCP server

LetX is the official remote MCP server from letx.app. It answers at https://api.letx.app/mcp over streamable HTTP and asks you to sign in with your letx.app account before it lists its tools, so your client opens a login the first time it connects. Our probes reached it 8 of 8 times since 7 September 2026; the last check, on 19 October 2026, got the sign-in challenge, so it is up.

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Description as the publisher wrote it.

What LetX needs before it works

A sign-in. The server refused to list its tools to an anonymous client and answered with an authentication challenge, which is how an MCP server protected by OAuth behaves. Add it with one of the setups below; the first connection opens a login for your letx.app account, and the tools appear once you have approved it.

Add LetX to your AI client

Every block below points at https://api.letx.app/mcp. Pick your client and copy.

claude mcp add --transport http letx https://api.letx.app/mcp

{
  "mcpServers": {
    "letx": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://api.letx.app/mcp"]
    }
  }
}

{
  "mcpServers": {
    "letx": {
      "url": "https://api.letx.app/mcp"
    }
  }
}

{
  "servers": {
    "letx": {
      "type": "http",
      "url": "https://api.letx.app/mcp"
    }
  }
}

{
  "context_servers": {
    "letx": {
      "url": "https://api.letx.app/mcp"
    }
  }
}

{
  "mcpServers": {
    "letx": {
      "serverUrl": "https://api.letx.app/mcp"
    }
  }
}

{
  "mcpServers": {
    "letx": {
      "url": "https://api.letx.app/mcp"
    }
  }
}

name: LetX
version: 0.0.1
schema: v1
mcpServers:
  - name: LetX
    type: streamable-http
    url: https://api.letx.app/mcp

{
  "mcpServers": {
    "letx": {
      "httpUrl": "https://api.letx.app/mcp"
    }
  }
}

{
  "mcpServers": {
    "letx": {
      "type": "http",
      "url": "https://api.letx.app/mcp"
    }
  }
}

{
  "mcpServers": {
    "letx": {
      "url": "https://api.letx.app/mcp"
    }
  }
}

goose://extension?url=https%3A%2F%2Fapi.letx.app%2Fmcp&type=streamable_http&id=letx&name=LetX

Is LetX up right now?

It answered our last check on 19 October 2026 in 495 ms. Over 8 checks since 7 September 2026 it answered 8. Status here comes from Neuronto's own probes, not from the publisher.

MCP servers similar to LetX

Questions about LetX

Is there an official LetX MCP server?

Yes. It is published by letx.app and served from api.letx.app, the vendor's own domain: https://api.letx.app/mcp.

How do I sign in to LetX?

Add the server with a setup above. The first time your client connects it opens the sign-in page for letx.app; approve it and the tools load.

Is LetX down?

It answered our last check on 19 October 2026 in 495 ms. Over 8 checks since 7 September 2026 it answered 8.

How do I add LetX to Cursor?

Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://api.letx.app/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.

Does LetX need an API key?

It needs a sign-in rather than a key you paste: the server answered with an authentication challenge, so your client runs the login when it first connects.

Where this comes from

Publisher: app.letx. Endpoint host: api.letx.app. ARD identifier: urn:air:app.letx:mcp:letx. First indexed 7 September 2026. The tools are exactly what the server returned; nothing on this page is inferred from its name. Ranking in Neuronto search is never for sale.