Gemini CLI k402 extract

How to: Gemini CLI k402 extract

client:Gemini CLI transport:streamable-http tool:extract

Add k402 to Gemini CLI

01
Open ~/.gemini/settings.json and merge this in. Keep any servers already there.

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

02
Save the file and restart Gemini CLI.
03
Ask for something extract does. Gemini CLI lists the server's tools on connect and calls extract itself — you do not invoke it by name.
04
If nothing happens, check the server is running and that k402's identifier in your config matches the one above exactly.

Gemini expands $VAR and ${VAR} inside env values, so a secret can live in your shell rather than this file. Gemini CLI docs

Set these first

k402 will not start until these are set, so extract 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