Man pages matching name pmjsonget in section 3:

pmjsonGet.3.en	debian 10 / libpcp-web1-dev
pmjsonget.3.en	debian 10 / libpcp-web1-dev
pmjsonGet.3.en	debian 11 / libpcp-web1-dev
pmjsonGet.3.en	debian 12 / libpcp-web1-dev