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mcp/harbor

Windsurf k402 use_session

How to: Windsurf k402 use_session

client:Windsurf transport:streamable-http tool:use_session

Add k402 to Windsurf

  1. 01

    Open ~/.codeium/windsurf/mcp_config.json and merge this in. Keep any servers already there. 

{
  "mcpServers": {
    "k402": {
      "serverUrl": "https://x402-compute.68cxgfyr0.workers.dev/mcp"
    }
  }
}
  1. 02

    Save the file and restart Windsurf.

  2. 03

    Ask for something use_session does. Windsurf lists the server's tools on connect and calls use_session itself — you do not invoke it by name.

  3. 04

    If nothing happens, check the server is running and that k402's identifier in your config matches the one above exactly.

Global only — Windsurf has no per-project MCP config. Refresh Cascade after saving. Windsurf docs

Set these first

k402 will not start until these are set, so use_session never becomes available.

  • K402_GATEWAY
  • K402_SESSION

Same tool, other clients

This list was read from the server itself, by connecting to it and calling tools/list on 24 September 2026. It is what the server actually exposes, not what its listing claims.

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.

k402 MCP server