# Response formats

## Success cases
Only the `application/json` content type is supported.

## Error cases
In case of processing error, the API will use NextGenPSD2 specific solution to give additional error information in the response.

Some errors may not follow this format if they are sent by a proxy between the client and the application.  This is the case with most authentication errors as of now.

The `application/problem+json` content type from [RFC7807](https://datatracker.ietf.org/doc/html/rfc7807)  is not currently supported.