{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"whoami","arguments":{}}} free no key
Streamable HTTP
https://www.pathwren.workers.dev/c/mcp-registry-official/mcp/netcheckclaude mcp add --transport http crawler-ip-verifier https://www.pathwren.workers.dev/c/mcp-registry-official/mcp/netcheckThis server publishes no installable package.