Overview

Amazon’s Application Management API (v2023‑11‑30) now returns a distinct 400‑status error when a seller tries to rotate an application’s client secret without first enabling rotation‑notification enrollment. The update replaces the previous generic “internal error” response with a message that explicitly cites the missing enrollment, prompting sellers to revise any automation that assumes only server‑side failures.

Key Points

• Error precision — Calls to the rotateApplicationClientSecret endpoint now produce a 400 error that states the application is not enrolled for rotation notifications, instead of a vague 5xx error.
• Faster troubleshooting — The specific wording lets developers identify the exact configuration gap, cutting down the time spent chasing ambiguous failures.
• Core functionality unchanged — The secret‑rotation process itself works the same; only the error response text has been altered.
• Automation risk — Scripts that only look for 5xx codes may mistakenly treat the new 400 response as a successful operation, leading to silent failures.
• Enrollment prerequisite — Applications must have the rotation‑notification flag set to true before invoking the secret‑rotation call, or the API will reject the request with the new error.
• Backward‑compatibility note — Existing integrations need to be updated to recognize the 400 status and the accompanying message to avoid misinterpretation.

How the Updated Error Handling Works

1. Submit rotation request — A seller’s system issues a POST to /applications/{applicationId}/rotateClientSecret.

   • Example: A fulfillment‑partner service sends the request every 90 days to keep its OAuth credentials fresh.

2. Check rotation‑notification flag — The API reads the application’s metadata to verify that the “rotation notification” setting is enabled.