What is the key difference between 400- and 500-level errors?
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Correct answer: 400-level errors are usually within the integration itself. 500-level errors are usually with the service you’re calling..
Why this is the answer
A 400-level error usually means the request has a problem created by the integration, such as invalid parameters, missing required values, authentication failure, or insufficient permissions. A 500-level error usually means the service receiving the request has a temporary or internal issue. In Amazon Ads API error handling, client-side problems and server-side problems are separated by status code category. This distinction helps decide whether to fix the request or retry later. Troubleshooting should start by identifying whether the error comes from request construction or service availability.
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