Deleting Product Advertising API (PA API)

When you delete a credential for the Product Advertising API (PA API), it can affect your ability to make API calls. Based on the information available, here are some important points to consider:

1. Deleting one credential may invalidate other credentials as well. There have been reports that deleting an older key can invalidate newer keys too, potentially requiring a 72-hour waiting period before they become active again.

2. For the PA API specifically, you should use your newly generated credentials for any "GetItems" operations going forward. Your old deleted credentials will no longer work.

3. If you're experiencing "InvalidSignature" errors with your new credentials when using Scratchpad, ensure you're:

• Using the complete secret key (copying from the CSV file in a text editor, not double-clicking)
• Using PAAPI-specific credentials (not general AWS IAM keys)
• Using the correct Partner Tag (your store ID)
• Ensuring your system time is properly synchronized

4. The PA API allows for two active keys to facilitate key rotation without service interruption. The proper procedure is to generate new keys, implement them in your application, verify functionality, and only then deactivate old keys.

In summary, you should use your new credentials for all future API calls, as the deleted credentials will no longer work. If you're still experiencing issues, verify that you're using the credentials correctly as outlined above.
Sources
Why have two keys for the Product Advertising API | AWS re:Post
Error! "InvalidSignature" | AWS re:Post
Error! "InvalidSignature" | AWS re:Post