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err:unkey:application:assertion_failed
Something went wrong on our side. It’s a bug in Unkey, not a problem with your request. You get HTTP 500 with an empty detail.
Example response

How to fix

  1. Retry once, with backoff, if the request is safe to repeat.
  2. If it fails again, contact support with the requestId, the endpoint, and the time. We need the requestId to find what failed.
Last modified on October 6, 2026