authplane-fastmcp 0.3.0

Authplane JWT validation adapter for FastMCP

authplane-fastmcp

Authplane JWT validation for servers built on FastMCP.

Install

pip install authplane-fastmcp

Quickstart

import asyncio
from authplane_fastmcp import authplane_auth
from fastmcp import FastMCP
from fastmcp.server.auth import AccessToken, require_scopes
from fastmcp.dependencies import CurrentAccessToken


async def main():
    mcp = FastMCP(
        "My MCP Server",
        **await authplane_auth(
            issuer="https://auth.company.com",
            base_url="https://mcp.company.com",
            scopes=["tools/query", "tools/write"],
        ),
    )

    @mcp.tool(auth=require_scopes("tools/query"))
    async def query_database(
        query: str, token: AccessToken = CurrentAccessToken()
    ) -> str:
        user_id = token.claims.get("sub")
        return f"Query: {query}, User: {user_id}"

    await mcp.run_async(transport="http", host="0.0.0.0", port=8080)


asyncio.run(main())

authplane_auth() holds background JWKS and metadata refresh tasks; call aclose() on the returned client during server shutdown.

Documentation

PRM behavior, dev mode, revocation checking, manual setup, scope enforcement semantics, claim access, the full authplane_auth / AuthplaneTokenVerifier API, and error handling: User Guide.