Observe & Analyze
Structured JSON events for every tool call — method, latency, errors, CSP violations. See exactly what your MCP server is doing.
Open-source proxy for MCP
MCP proxy that logs every tool call, fixes CSP, and routes widgets. Plug it in front of any MCP server.
curl -fsSL https://mcpr.app/install.sh | sh 
How it works
1
Receive RequestAI client sends HTTP request to mcpr
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2
Parse JSON-RPC 2.0Detect MCP method and tool name from request body
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3
Route to UpstreamJSON-RPC → MCP server, everything else → widget server
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4
Log & ObserveEmit structured event — tool name, latency, status, session
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5
Rewrite & RespondFix CSP headers per platform, return response to client
mcpr —mcp http://localhost:9000
What you get
MCP-Aware Routing
mcpr reads JSON-RPC 2.0. MCP requests go to your backend, everything else serves widgets. CSP headers injected automatically.
Studio
Test tools, debug widgets, replay user sessions. Full ChatGPT & Claude sandbox simulation — no API key needed.
Tunnel
Public HTTPS URL for local development. Stable across restarts. Configure your AI client once, keep developing.