Enterprise MCP Gateway and AI Tool Registry

Secure tool-discovery and execution gateway for AI-agent integrations. The project combines a runnable FastAPI gateway with an optional standards-based MCP server entrypoint built with the official Python MCP SDK.

Highlights

• JWT authentication with demo admin, developer, and viewer roles

• RBAC enforcement for tool execution and administrative operations

• Persistent tool registry and audit logs with SQLAlchemy

• Built-in calculator, summarizer, keyword extractor, and gateway-health tools

• Allowlisted HTTP tool registration for controlled external API integration

• Redis-backed rate limiting with an in-memory fallback

• Optional OpenTelemetry export to Jaeger

• Prometheus-style gateway metrics at /metrics

• REST endpoints for browser testing and an optional FastMCP Streamable HTTP server

• Automated tests and GitHub Actions CI

Related MCP server: LangGraph FastAPI MCP Server

Architecture

AI Client / Developer
        |
        v
 FastAPI Gateway -----> JWT Auth + RBAC
        |
        +-----> Tool Registry -----> Built-in Tools
        |                     `----> Allowlisted HTTP Tools
        |
        +-----> Rate Limiter ------> Redis or in-memory fallback
        |
        +-----> Audit Store -------> SQLite quick start / PostgreSQL Docker mode
        |
        `-----> OpenTelemetry -----> Jaeger (optional)

Quick Start

python -m venv .venv
source .venv/bin/activate
python -m pip install -r requirements-dev.txt
cp .env.example .env
python -m uvicorn app.main:app --host 0.0.0.0 --port 8000

Open http://localhost:8000/docs.

Demo Accounts

These are intentionally demo-only credentials. Replace the identity layer before deployment.

Run Tests

python -m pytest -q

Optional Standards-Based MCP Server

python -m pip install -r requirements-mcp.txt
python mcp_server.py

Connect an MCP client or MCP Inspector to http://localhost:8000/mcp.

Docker Compose

docker compose up --build

• API docs: http://localhost:8000/docs

• Jaeger UI: http://localhost:16686

Documentation

See docs/ for setup, architecture, API reference, MCP notes, and security considerations.

Security Note

The REST gateway demonstrates authentication, authorization, rate limiting, auditing, and allowlisted outbound calls. The optional local MCP server is a separate SDK demonstration. A remote MCP deployment should use OAuth 2.1 resource-server protection and production identity infrastructure.