> ## 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.

# no_compatible_endpoint

> HTTP 400 — No provider supports the required API format for this model.

## HTTP status

`400 invalid_request_error`

## Typical cause

The model is in the catalog, but none of its providers serve the API you're calling. Models that are only served via the Response API return [`response_api_only`](/errors/response_api_only) instead.

## Resolution

Check which APIs the model supports: read `supported_endpoints` from [`GET /v1/models?endpoint=responses`](/api-reference/list-callable-models) or from each provider entry in the [model directory](/api-reference/model-directory). Then call a supported endpoint, or choose a model that supports the API you need.