Nginx has a http_stub_status_module, allowing simple info about the service. Dunno if that fits into this ?
Active connections: 3
server accepts handled requests
19547 19547 37694
Reading: 0 Writing: 1 Waiting: 2
Active connections
The current number of active client connections including Waiting connections.
accepts
The total number of accepted client connections.
handled
The total number of handled connections. Generally, the parameter value is the same as accepts unless some resource limits have been reached (for example, the worker_connections limit).
requests
The total number of client requests.
Reading
The current number of connections where nginx is reading the request header.
Writing
The current number of connections where nginx is writing the response back to the client.
Waiting
The current number of idle client connections waiting for a request.
