POST Web API returning 401 with Postman (and with some apps)

Question

Hi, we created a POST Web API that invokes a process model. Within Appian and using cURL, SoapUI, and Advanced REST Client (Chrome), we get a successful response (200 with expected response body). However, when we call it via Postman or via apps that we developed in Bluemix, it returns "HTTP Status 401 - This requires HTTP authentication". In the header, we include Authorization: Basic (base64 encoded username and password) for all our calls. Did anyone experience the same issue? Is there a solution/step that we may have missed in Appian? Thanks!

aloks0189 · Answer

Hi Marc Angeles yes it's an expected behavior. When you create a Web-API (POST) and consume it from some different type of systems such as Java, .Net or any other, this require Cross Origin to be set. 
 
For this You can go to Admin Console >> Integration >> Embedded Interfaces >> Origins

Using SoapUI and Chrome REST Client you have got the response, because they handle this configuration from their side.

Hope this will help you