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MCP Servers

Daimon connects to each listed MCP server at startup (as a client, over stdio). Their tools are injected into every chat request automatically — no code changes needed in your application.

mcp_servers:
  - name: filesystem    # logical name (used in logs)
    command:            # argv to start the server process
      - npx
      - -y
      - "@modelcontextprotocol/server-filesystem"
      - /tmp

  - name: github
    command:
      - npx
      - -y
      - "@modelcontextprotocol/server-github"

The command array is the full argv — no shell expansion or interpolation.

Note

MCP server startup failures are non-fatal. Daimon logs a warning and continues without that server's tools.

Server npm package What it provides
Filesystem @modelcontextprotocol/server-filesystem Read/write files in a sandboxed directory
GitHub @modelcontextprotocol/server-github Search repos, issues, PRs
Brave Search @modelcontextprotocol/server-brave-search Web search
Postgres @modelcontextprotocol/server-postgres Query a Postgres database
SQLite @modelcontextprotocol/server-sqlite Query a SQLite database
Fetch @modelcontextprotocol/server-fetch HTTP GET arbitrary URLs

Browse the full catalogue at modelcontextprotocol.io/servers.

See Tool Calls (MCP) for the full guide including the agentic loop, observing tool calls in SDKs, and providing your own tools.