Attribute●Since v2.0

google_api_key

google_api_key: SecretStr | None = Field(
  alias='api_key',
  default_factory=(secret_from_env(['GOOGLE_API_KEY', 'GEMINI_API_KEY'

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API key for authentication.

If not specified, will check the env vars GOOGLE_API_KEY and GEMINI_API_KEY with precedence given to GOOGLE_API_KEY.

Gemini Developer API: API key is required (default when no project is set)
Vertex AI: API key is optional (set vertexai=True or provide project)
- If provided, uses API key for authentication
- If not provided, uses Application Default Credentials (ADC) or credentials parameter

Vertex AI with API key

You can now use Vertex AI with API key authentication instead of service account credentials. Set GOOGLE_GENAI_USE_VERTEXAI=true or vertexai=True along with your API key and project.

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google_api_key