Based on the provided knowledge sources, I can answer your question about the status codes that the POST

/oauth2/token

endpoint can return. The information is primarily found in the Ory API Reference and Hydra API Reference documents. The POST

/oauth2/token

endpoint (also known as oauth2TokenExchange) can return the following status codes: 1. 200 OK: This is returned when the token exchange is successful. The response includes details such as access_token, expires_in, id_token (if requested), refresh_token (if requested), scope, and token_type [Ory API Reference](https://www.ory.sh/docs/reference/api) [Hydra API Reference](https://www.ory.sh/docs/hydra/reference/api). 2. Default (Error): This is returned when there's an error in the token exchange process. The error response includes fields like error, error_debug (only available in dev mode), error_description, error_hint, and status_code [Ory API Reference](https://www.ory.sh/docs/reference/api) [Hydra API Reference](https://www.ory.sh/docs/hydra/reference/api). It's worth noting that while the documentation doesn't explicitly list other status codes, in practice, you might encounter additional status codes depending on the specific error conditions. For example: 3. 500 Internal Server Error: This can be returned in case of server-side issues, as mentioned in the debug example [Hydra Debug Documentation](https://www.ory.sh/docs/hydra/debug#oauth2token-endpoint-fails-for-jwks-based-client). The exact status code in error cases may vary depending on the nature of the error and how it's handled by the server. The error details are typically provided in the response body rather than through different status codes.