Managed MCP host behavior, observed

MCP Host Canary

Create a disposable no-auth MCP server, connect it to Claude, ChatGPT, Cursor, or another managed host, and see whether discovery, tools/list, tools/call, or a registered callback actually reached the server.

No signup or install. Runs expire after 30 minutes. Tokens, prompts, request bodies, tool arguments, IP addresses, and raw User-Agent strings are not retained.