Paste the URL of a live MCP (Model Context Protocol) server using the Streamable HTTP transport, and this tool connects to it, runs the initialize and tools/list calls, and shows exactly which tools it exposes and their descriptions, handy for debugging your own server or checking one before connecting it to an agent.
Your result will appear here.
The Streamable HTTP transport (JSON-RPC 2.0 over a single HTTP endpoint). Stdio-based local servers can't be tested from a hosted web tool.
Common causes: the server requires auth headers this tool doesn't send, it only supports stdio, or it isn't a valid MCP endpoint. Check your server logs for the incoming request.
The tool only calls initialize and tools/list, both read-only, standard MCP calls. It doesn't call or execute any of the listed tools.