1. Define new command in /usr/local/nagios/etc/commands/
define command { command_name check_my_service command_line $USER1$/check_http -H example.com -u "http://example.com/health/someapi/" -a <username>:<password> }
Above is example for checking http with authorization (see check_http –help
for options)
2. Add a check with the name of the command that you defined above to /usr/local/nagios/etc/services/
define service{ use generic-service service_description Check for my new service check_command check_my_service host_name localhost }