MCP Tool Explorer

🔎 Inspect & chat with MCP tools

Paste an MCP manifest URL to see its tools. Optionally, use your own OpenAI API key to let the chat pick and call your MCP tools over HTTP (developer-only).

You can also try my sample MCP server to see how this tool works. Paste https://mcp-sample-server-js.onrender.com/.well-known/mcp.json below and click “Discover tools”. The sample server runs on a free tier and can take up to ~90 seconds to wake up after inactivity, so wait 1–2 minutes between attempts if it’s cold. server repo

Once tools are loaded and your OpenAI key is set, try:
Single tool: What is the sum of 1 and 2?
Multiple tools: What time did you add 10,20 and 70
Expected: JSON manifest with a tools array. For tool calls, this page assumes your server exposes POST /mcp/tools/{toolName} with JSON body { "args": {...} } and returns { "result": ... }.

Chat with your MCP server (OpenAI)

Developer-only. Your OpenAI key is used from this page to: (1) read the manifest, (2) plan one or more tool calls with arguments, (3) call POST /mcp/tools/{toolName}. The key is not stored, but is visible in your browser’s network inspector. For production, use a backend.
System prompt for tool planning (editable):
The assistant will read the manifest and this system prompt, decide which tool(s) to call, construct arguments, and execute them through your MCP server.