How to call a single event in a process from an external system

Question

Good afternoon, 
 
 How can I activate a single event(receive message) in a process from an external system like Postman. 
 
 Thanks in advance for your support!

Robert Shankin · Answer

Appian makes short work of this! 
 Please review the documentation regarding Appian web API' s. https://docs.appian.com/suite/help/20.1/Web_APIs.html https://docs.appian.com/suite/help/20.1/Web_API_Tutorial.html 
 You'll want to create an Appian Web API and select the template Create/Start Process. 
 Comment here or provide feedback in the docs if you have trouble with the tutorial.