Interactive demo

See it in action

Click through a guided, interactive walkthrough of the platform below — then run a real MCP call against a live server further down this page.

Try it live

Call a real MCP server right from this page.

No signup, no API key. The button below sends an actual JSON-RPC request over HTTPS to a published, publicly-installable MCP server — the same one you could point Claude or any MCP client at.

Example server

Cat Facts — a no-auth example server

This is one of the platform's public example servers: a tiny OpenAPI spec (catfact.ninja) turned into a governed MCP server with one tool, get_cat_fact. It's published, so anyone with the endpoint URL can connect — exactly like Claude's custom connectors do.

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Endpoint

Every request below goes to:

POST https://mcpplatform.dev/mcp/srv_c7dcf1cd45

This is the exact URL you'd paste into Claude → Settings → Connectors → Add custom connector. See the quickstart for that walkthrough.

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What the button does

Two calls, in order, both real JSON-RPC 2.0 requests sent with fetch() from your browser:

  1. tools/list — discover what the server exposes
  2. tools/call — invoke get_cat_fact and return a live cat fact

Run it

Why this matters: there's no backend proxy on this page — your browser is talking directly to the live, multi-tenant runtime. The response you see is the exact payload an agent's tools/call gets back, including the policy decision (this tool is read-only, so it's an automatic allow).
Build your own server Read the docs