If your program only uses client in brpc or doesn't use brpc at all, but you also want to use built-in services in brpc. The thing you should do is to start an empty server, which is called dummy server.
Create a file named dummy_server.port which contains a port number(such as 8888) in the running directory of program, a dummy server would be started at this port. All of the bvar in the same process can be seen by visiting its built-in service.
You must manually add the dummy server. First read Getting Started to learn how to download and compile brpc, and then add the following code snippet at the program entry:
#include <brpc/server.h> ... int main() { ... brpc::StartDummyServerAt(8888/*port*/); ... }