Skip to content

Zed k402 open_session

How to: Zed k402 open_session

client:Zed transport:streamable-http tool:open_session

Add k402 to Zed

  1. 01

    Open ~/.config/zed/settings.json and merge this in. Keep any servers already there.

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

    Save the file and restart Zed.

  2. 03

    Ask for something open_session does. Zed lists the server's tools on connect and calls open_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.

Merge this into your existing settings object — do not replace the file. Zed docs

Set these first

k402 will not start until these are set, so open_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.