Azure Functions Python extension for MCP STDIO adapter - converts STDIO MCP servers to streamable HTTP endpoints
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# Azure Functions MCP STDIO Adapter A Python extension for Azure Functions that acts as an adapter between MCP (Model Context Protocol) servers running on STDIO and HTTP clients. This adapter surfaces STDIO-based MCP servers as streamable HTTP endpoints without modifying the underlying MCP server behavior. ## Overview The Azure Functions MCP STDIO Adapter enables seamless integration between: - **Input**: Python MCP servers that communicate via STDIO (JSON-RPC over stdin/stdout with Content-Length framing) - **Output**: Azure Functions HTTP endpoints that expose streamable HTTP responses - **Transport**: Maintains protocol parity without modifying customer MCP servers ### Data Flow Diagram ``` Client ⇄ HTTP Stream ⇄ Azure Function Adapter ⇄ STDIO ⇄ MCP Server │ │ │ │ │ │ │ └─ Customer's MCP Server │ │ └─ JSON-RPC over STDIO │ └─ Process Management & Forwarding └─ Streamable HTTP Responses ``` ## Features - **Multi-format Configuration Support**: Supports various JSON configuration formats - **Process Lifecycle Management**: Automatic start, monitor, and graceful shutdown of MCP servers - **Streaming HTTP Integration**: Uses MCP SDK's StreamableHTTPSessionManager for real-time communication - **UVX Integration**: Supports `uvx` (uv tool run) for running MCP servers without global installation - **Error Recovery**: Handles MCP server crashes and reconnection scenarios - **Environment Variable Support**: Passes through environment variables to MCP servers - **Well-known Configuration Files**: Supports loading from standard file locations ## Session Isolation & Multi-Tenancy The Azure Functions MCP STDIO Adapter provides **best-effort session isolation** for multi-tenant scenarios while maintaining optimal resource utilization. ### Session-to-Process Mapping Each unique session…
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