How to Call Web API?

1. First click on API Management in API Management tab then click the add new button for creating a new API and fill details regrading the API. We also one entry bydefault you can also use this one.
2. After that, Please click the SMTP & API tab, there we have some example and code that how you use the webapi in application/software/plugin. 
3. End of show response received after API call.

We have also made the video of this. Watch to below video.