"Expo" matching MCP servers:

Enables AI agents to call existing Node.js API routes as MCP tools across NestJS, Express, Fastify, Koa, Hono, and AdonisJS, preserving existing auth, validation, and middleware.

Enables fault-tolerant agent tool execution with adaptive exponential backoff, full jitter, rate-limit 429 backpressure handling, and circuit breaker patterns to make AI agent calls resilient to transient failures. Plugs directly into MCP-compliant clients via JSON-RPC 2.0 stdio with zero external dependencies.

This MCP server wraps agent tool calls with fault-tolerant retry logic, including adaptive exponential backoff, full jitter, 429 rate-limit backpressure handling, and circuit breaker patterns. It enables autonomous agents to execute tools reliably without frontier LLM round-trips, using a zero-dependency Python stdio JSON-RPC interface.

Automatically starts a repo-aware MCP server for the current workspace, finds a free port, and optionally exposes it via Cloudflare tunnel for integration with ChatGPT/OpenAI.