authplane-mcp 0.3.0

Authplane JWT validation adapter for the official MCP Python SDK

authplane-mcp

Authplane JWT validation for servers built on the official MCP Python SDK.

Install

pip install authplane-mcp

Compatibility

Supported mcp range: >=1.23.0, <1.28.0. MCP 1.28 renamed the elicitation field from elicitationId (camelCase) to elicitation_id (snake_case), which breaks this adapter's current wire handling. If your project needs MCP 1.28+, please open an issue — the adapter update is straightforward, we just haven't cut it yet.

Quickstart

import asyncio

from authplane_mcp import authplane_mcp_auth, require_scope
from mcp.server.fastmcp import FastMCP


async def main() -> None:
    auth_result = await authplane_mcp_auth(
        issuer="https://auth.company.com",
        resource="https://mcp.company.com",
        scopes=["tools/query", "tools/write"],
    )
    mcp = FastMCP("My MCP Server", port=8080, json_response=True, **auth_result)

    @mcp.tool()
    async def query_database(query: str) -> str:
        require_scope("tools/query")
        return f"Result for: {query}"

    try:
        await mcp.run_streamable_http_async()
    finally:
        await auth_result.aclose()


asyncio.run(main())

auth_result holds background JWKS and metadata refresh tasks bound to the running event loop. Keep the setup, server, and aclose() inside a single asyncio.run(main()) so those tasks stay alive for the server's lifetime.

Documentation

PRM behavior, dev mode, revocation checking, manual setup, the full authplane_mcp_auth / AuthplaneTokenVerifier API, and error handling: User Guide.