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

# Unsupported response type

# `unsupported_response_type`

| HTTP | When                                  |
| ---- | ------------------------------------- |
| 400  | The `response_type` is not supported. |

Only `response_type=code` is supported (authorization code with
PKCE). See [OAuth §3](../oauth.md#3-authorization-code-with-pkce).