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

# upstream_error

> HTTP 502 — An upstream provider returned an invalid or unparseable response.

## HTTP status

`502 api_error`

## Typical cause

An upstream provider returned an unexpected error.

## Resolution

Retry with backoff. Upstream is the source of truth; the failure may clear on its own.