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

# chat_provider_unavailable

> The upstream chat model is temporarily unavailable.

**Code**: `chat_provider_unavailable`
**HTTP status**: `502`
**Type**: `server_error`

## When it fires

The upstream chat model returned a 5xx, dropped the connection, or didn't respond within the platform's timeout. Any credits held for this request have been released — you're not charged.

## How to recover

Retry with exponential backoff (1s → 2s → 4s → 8s, max \~30s). With an `Idempotency-Key` on a non-streamed request, retries are safe. If the issue persists, check status.aurous-labs.com or reach support with the response `request_id`.