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Why When Invoking An OIC Integration Endpoint Does It Fail With - Access To XMLHttpRequest At 'XXX' From Origin 'YYY' Has Been Blocked By CORS Policy: No 'Access-Control-Allow-Origin' Header Is Present On Requested Resource? (Doc ID 2691723.1)

Last updated on JULY 29, 2020

Applies to:

Oracle Integration-OIC - Version 18.2.5 and later
Information in this document applies to any platform.


This is for a custom AppDriven Integration in OIC with REST (JSON). 

The Endpoint is provided to a 3rd Party, but while invoking it, the below error is seen:

Why can it not be invoked? 


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