mcp-proxy

MCP Proxy is a TypeScript-based HTTP and Server-Sent Events (SSE) proxy designed for MCP servers that utilize stdio transport, facilitating compatibility between clients of different protocol revisions. It enables seamless handling of protocol revisions from 2025 to 2026-07-28 using a single endpoint, with built-in CORS support, while allowing configurable connection settings for upstream negotiation. Notable features include progress tracking, cancellation support, and a streamlined architecture that allows for multi-client interactions without requiring them to be aware of each other's protocol versions.