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UnknownOperation (ValidationException): Amazon Creators API error

HTTP 400ValidationExceptionRequest validation (400)Documented by Amazon

What it means

The operation in the URL does not exist.

Message returned by the API: The operation requested is invalid. Please verify that the operation name is typed correctly.

Typical causes

  • Typo in the path, e.g. /catalog/v1/getitems instead of /catalog/v1/getItems.
  • Old PA-API 5 path (/paapi5/getitems).

How to fix it

  1. Use one of /catalog/v1/getItems, /catalog/v1/searchItems, /catalog/v1/getVariations, /catalog/v1/getBrowseNodes on https://creatorsapi.amazon.

Not sure which part fails? Run Test credentials in the Scratchpad. It checks the token, the API access and the partner tag separately.

Example response

{
  "type": "ValidationException",
  "message": "The operation requested is invalid. Please verify that the operation name is typed correctly.",
  "reason": "UnknownOperation"
}

Related errors

  • FieldValidationFailed: A required field is missing or has an invalid value. The `fieldList` in the response names it.