Test, validate and debug Model Context Protocol servers and Agent2Agent cards — free, no signup, runs on the edge.
Paste an MCP endpoint URL — we run the full initialize handshake and report reachability, JSON-RPC compliance, server info and latency.
Validate your Agent Card JSON against the A2A spec — required fields, capabilities, skills.
Check MCP server package manifests for name, entrypoint and server config completeness.
All tools are available as JSON APIs:
POST /api/mcp-test {"url":"..."}