Stdio servers

Configure MCP servers under mcp in normal Topchester config:

{
  "mcp": {
    "everything": {
      "type": "stdio",
      "command": "node",
      "args": ["./test/fixtures/mcp/stdio-server.js"],
      "env": {
        "EXAMPLE": "1",
      },
      "enabledTools": ["echo"],
      "timeoutMs": 5000,
    },
  },
}

Only type: "stdio" is accepted.

• command is a single executable name or path.
• args is the argv list passed without a shell.
• env adds string environment variables for the server process.
• enabled defaults to true.
• args and env default to empty values.
• timeoutMs applies to connect, list, and call requests.

MCP tools are exposed with stable Topchester tool names in the form mcp_<server>_<tool>, after sanitizing punctuation and casing. For example, server everything tool echo becomes mcp_everything_echo.

Prefer enabledTools so broad servers do not expose every available tool to the model.