If an identity namespace creation API request fails, what is the first thing to check?

When an identity namespace creation API request fails, the first thing to check is the authorization tokens. This is because authorization tokens are crucial for validating that your API request has the proper permissions to access and modify resources within the Adobe Experience Platform. If the token is missing, expired, or incorrectly configured, the API will reject the request, resulting in a failure.

Ensuring that the authorization tokens are correct helps rule out a common issue immediately. If the tokens are not valid, the request will not be processed, and it will save time in troubleshooting other aspects of the API request such as the endpoint URL or the structure of the request body.

Investigating the other choices, while the endpoint URL and request body structure are also important factors in API requests, they typically come into play once you have confirmed that authorization is properly set up. Similarly, sandbox status may be relevant, but it would not be the first priority compared to ensuring that your authorization tokens are correct.