> ## Documentation Index
> Fetch the complete documentation index at: https://docs.generalvalidation.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Invalid Idempotency-Key

> Resolve idempotency.key_invalid in General Validation.

`idempotency.key_invalid` · request

The Idempotency-Key header must be 1-128 visible ASCII characters with no leading or trailing whitespace.

If the problem continues, contact [support](mailto:support@generalvalidation.com) with the error code and request or Run ID. Keep source rows, exact values, credentials, and evidence files in your Azure environment.

[Troubleshooting](/troubleshooting-and-logs) · [All error codes](/errors)