BerriAI/litellm · error · NotImplementedError

sync_get_auth_token_and_url is not implemented

Error message

sync_get_auth_token_and_url is not implemented

What it means

Error "sync_get_auth_token_and_url is not implemented" thrown in BerriAI/litellm.

Source

Thrown at litellm/llms/base_llm/google_genai/transformation.py:135

        self,
        api_base: str | None,
        model: str,
        litellm_params: dict,
        stream: bool,
    ) -> tuple[dict, str]:
        """
        Sync version of get_auth_token_and_url.

        Args:
            api_base: Base API URL
            model: The model name
            litellm_params: LiteLLM parameters
            stream: Whether this is a streaming call

        Returns:
            Tuple of headers and API base
        """
        raise NotImplementedError("sync_get_auth_token_and_url is not implemented")

    async def get_auth_token_and_url(
        self,
        api_base: str | None,
        model: str,
        litellm_params: dict,
        stream: bool,
    ) -> tuple[dict, str]:
        """
        Get the complete URL for the request.

        Args:
            api_base: Base API URL
            model: The model name
            litellm_params: LiteLLM parameters

        Returns:
            Tuple of headers and API base

View on GitHub (pinned to 77b7c6c40c)

Solutions

1. Use a concrete Google GenAI config subclass implementing sync_get_auth_token_and_url.

When it happens

Trigger: Thrown at litellm/llms/base_llm/google_genai/transformation.py:135 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of BerriAI/litellm@77b7c6c40c (2026-08-18). Data as JSON: /api/errors/3c35e7ae16c7c246. Report an issue: GitHub.