Brain MCP Server

# Brain MCP Server - Claude Code Accept Header Debug Log ## Issue Summary Claude Code's HTTP MCP client doesn't send the required `Accept: application/json, text/event-stream` header, causing the MCP Python SDK's streamable-http transport to reject requests with "Not Acceptable" errors. ## Root Cause - **Claude Code bug**: https://github.com/anthropics/claude-code/issues/15523 - **MCP SDK strict validation**: https://github.com/modelcontextprotocol/python-sdk/issues/1641 ## Attempted Solutions ### 1. Starlette Middleware (Failed) - Tried to add middleware via `mcp.app.add_middleware()` - FastMCP doesn't expose `.app` attribute - Would require access to FastMCP internals ### 2. ASGI Wrapper (Failed) - Tried to wrap the ASGI app before passing to uvicorn - Couldn't access transport.asgi_app without manually creating transport - FastMCP.run() abstracts this away ### 3. Uvicorn Monkey-Patch (Current Attempt - Hanging) - Patching `uvicorn.protocols.http.h11_impl.H11Protocol.handle_events` - Async method being called synchronously - Causes requests to hang ## Current Investigation Need to patch at a point where: 1. We can intercept the ASGI scope before MCP transport sees it 2. The patch point is synchronous OR properly async 3. It works with FastMCP.run() ## Next Steps - Try patching at ASGI middleware layer with proper async handling - OR patch the h11 protocol's connection handling before handle_events - OR use a reverse proxy (nginx/caddy) to fix headers externally