# idempotency_unavailable

> Idempotency can't be guaranteed right now, so nothing was sent.

Source: https://tickwire.io/docs/errors/idempotency_unavailable/

HTTP 503. Nothing reached the broker.

**Likely causes:**

- The idempotency store is unavailable.
- The idempotency store is full of requests that are still running.

**What to do:** Retry after Retry-After, or drop the header to trade without idempotency.

**Retry:** Yes. Nothing happened (or it was a read), so repeat it, after `Retry-After` when present.

Listed under [Orders and idempotency](https://tickwire.io/docs/errors/#orders-and-idempotency) in [Errors](https://tickwire.io/docs/errors/). Send the error's `requestId` to support and we can find the request.