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Windsurf Countersign by Signalry request_agent_key

How to: Windsurf Countersign by Signalry request_agent_key

client:Windsurf transport:streamable-http tool:request_agent_key

Add Countersign by Signalry to Windsurf

  1. 01

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

{
  "mcpServers": {
    "countersign": {
      "serverUrl": "https://countersign.signalry.ai/mcp"
    }
  }
}
  1. 02

    Save the file and restart Windsurf.

  2. 03

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

  3. 04

    If nothing happens, check the server is running and that Countersign by Signalry'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

Same tool, other clients

This list was read from the server itself, by connecting to it and calling tools/list on 11 November 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.

Countersign by Signalry MCP server