BerriAI/litellm · error · ValueError

Google API key is required. Set GOOGLE_API_KEY or GEMINI_API

Error message

Google API key is required. Set GOOGLE_API_KEY or GEMINI_API_KEY environment variable.

What it means

Error "Google API key is required. Set GOOGLE_API_KEY or GEMINI_API_KEY environment variable." thrown in BerriAI/litellm.

Source

Thrown at litellm/llms/gemini/interactions/transformation.py:116

            headers["Api-Revision"] = "2026-05-20"

        return headers

    def get_complete_url(
        self,
        api_base: str | None,
        model: str | None,
        agent: str | None = None,
        litellm_params: dict | None = None,
        stream: bool | None = None,
    ) -> str:
        """POST /{api_version}/interactions"""
        litellm_params = litellm_params or {}
        api_base = GeminiModelInfo.get_api_base(api_base)
        api_key: Final = GeminiModelInfo.get_api_key(litellm_params.get("api_key"))

        if not api_key:
            raise ValueError("Google API key is required. Set GOOGLE_API_KEY or GEMINI_API_KEY environment variable.")

        if stream:
            return f"{api_base}/{self.api_version}/interactions?alt=sse"

        return f"{api_base}/{self.api_version}/interactions"

    def transform_request(
        self,
        model: str | None,
        agent: str | None,
        input: InteractionInput | None,
        optional_params: InteractionsAPIOptionalRequestParams,
        litellm_params: GenericLiteLLMParams,
        headers: dict,
    ) -> dict:
        """
        Build request body per OpenAPI spec.

View on GitHub (pinned to 6c2dcb801b)

Solutions

1. Set GOOGLE_API_KEY or GEMINI_API_KEY in the environment.

When it happens

Trigger: Thrown at litellm/llms/gemini/interactions/transformation.py:116 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of BerriAI/litellm@6c2dcb801b (2026-08-15). Data as JSON: /api/errors/777981c528c26d78. Report an issue: GitHub.