Expose (JSON-RPC Proxy)

Proxy server that enables communication between clients and MCP-compatible services through JSON-RPC, forwarding requests to configured backend URLs while maintaining proper error handling and response formatting.

Expose is a proxy server implementation that enables communication between clients and MCP-compatible services through JSON-RPC. Built by a0dotrun, it provides a Go-based middleware that handles standard MCP methods like 'initialize', 'tools/list', and 'tools/call' by forwarding requests to a configured backend URL while maintaining proper error handling and response formatting. The server can operate over standard I/O streams with graceful shutdown capabilities, making it suitable for integrating existing services with MCP clients or creating lightweight proxies between different MCP implementations.