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

# idempotency_in_progress

> Idempotent request in progress (HTTP 409)

| | |
| - | - |
| HTTP status | `409` |
| OpenAI `type` | `invalid_request_error` |
| Anthropic `type` | `invalid_request_error` |
| Retry | Yes. Error responses carry `x-should-retry: true`. |

## What it means

The first request with this `Idempotency-Key` is still running.

## What to do

Retry after the `Retry-After` delay (1 s). The SDKs do this for you.


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