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To enable the Try it out button for your API in the Developer Portal catalog, the API must include a CORS Restriction policy.
An existing API defined in the API Manager
In the API Manager, go to the API Details tab of the target API and add a CORS Restriction policy.
Learn how to add a policy to your API.
Configure the CORS Restriction Policy.
Add an Access Control Allow Origins entry. Set the value to the URL to your pod.
Example: https://elastic.snaplogic.com
Add three Access Control Request Headers entries. Set the values to the following:
Accept
Authorization
Content-Type
Select Access Control Allow Credentials.
Click Validate & Save.