Builtin services expose internal status of servers in different pespectives, making development and debugging over brpc more efficient. brpc serves builting services via HTTP, which can be easily accessed through curl and web browsers. Servers respond plain text or html according to `User-Agent` in the request header, or you may append `?console=1` to the uri to force the server to respond in plain text. Check the [example](http://brpc.baidu.com:8765/) running on our dev machine(only accessible from Baidu internal) for more details. If the port is forbidden from where you run curl or web browser (e.g. not all ports are accessible from a web browser inside Baidu), you can use [rpc_view](rpc_view.md) for proxying.