check_http_api is basic check for measuring performance of HTTP API servers. Any HTTP backend can act as monitoring point for this check. It will do GET request to your api server and calculate its response time, which will be sent to OddEye. check_http_api supports HTTP basic authentication. Parameters for this check ate in HTTP section of webservers.ini file:

[HTTP]
upstream: http://your.api.com:8080, https://yoursecure.api.com:8443
user: netangels
pass: bololo
auth: True    

You can add as many upstreams as you wish to monitor. The only limit is that you must provide full URL of monitored endpoint. Final metrics names will look like this :

http_your_api_com_8080
http_your_secure_api_com_8443

Where 8080 amd 8443 are ports of configured API server. If your api server binds on default HTTP/HTTPS ports, you can exclude port number from upstream of HTTP config:

[HTTP]
upstream: http://your.api.com, https://yoursecure.api.com
user: netangels
pass: bololo
auth: True    

In this case check names at OddEye will look like this:

http_your_api_com_80
http_your_secure_api_com_443

Please note that http_ prefix is not describing exact protocol, but just prefixing check name for easy check. Thus both HTTP and HTTPS checks will have http_ prefix.