# Idempotency (https://docs.chargeflow.io/docs/reference/api-fundamentals/idempotency)



<ComingSoon>
  Idempotency key documentation is coming soon. The `Idempotency-Key` header can be used on evidence
  generation requests to safely retry without creating duplicates. Full documentation is in
  progress.
</ComingSoon>

## Next steps [#next-steps]

<Cards>
  <Card title="Generate and Regenerate Evidence" href="/docs/platforms/eaas/generate-and-regenerate">
    Where the idempotency key applies today.
  </Card>

  <Card title="Error Handling" href="/docs/reference/api-fundamentals/error-handling">
    Retry safely after a failed request.
  </Card>

  <Card title="Authentication" href="/docs/reference/api-fundamentals/authentication">
    Set up the credentials every request needs.
  </Card>
</Cards>