BerriAI/litellm · error · AuthenticationError

{exception_provider} AuthenticationError - {message}

Error message

{exception_provider} AuthenticationError - {message}

What it means

Error "{exception_provider} AuthenticationError - {message}" thrown in BerriAI/litellm.

Source

Thrown at litellm/litellm_core_utils/exception_mapping_utils.py:1963

        raise BadRequestError(
            message=helpful_message,
            llm_provider="azure",
            model=model,
            litellm_debug_info=extra_information,
            response=getattr(original_exception, "response", None),
            body=getattr(original_exception, "body", None),
        )
    elif "invalid_request_error" in error_str and getattr(original_exception, "status_code", None) in (None, 400):
        raise BadRequestError(
            message=f"AzureException BadRequestError - {message}",
            llm_provider="azure",
            model=model,
            litellm_debug_info=extra_information,
            response=getattr(original_exception, "response", None),
            body=getattr(original_exception, "body", None),
        )
    elif "The api_key client option must be set either by passing api_key to the client or by setting" in error_str:
        raise AuthenticationError(
            message=f"{exception_provider} AuthenticationError - {message}",
            llm_provider=custom_llm_provider,
            model=model,
            litellm_debug_info=extra_information,
            response=getattr(original_exception, "response", None),
        )
    elif "Connection error" in error_str:
        raise APIConnectionError(
            message=f"{exception_provider} APIConnectionError - {message}",
            llm_provider=custom_llm_provider,
            model=model,
            litellm_debug_info=extra_information,
        )
    elif hasattr(original_exception, "status_code"):
        if original_exception.status_code == 400:
            raise BadRequestError(
                message=f"AzureException - {message}",
                llm_provider="azure",

View on GitHub (pinned to 6c2dcb801b)

Solutions

1. Check the provider API key/credentials.

When it happens

Trigger: Thrown at litellm/litellm_core_utils/exception_mapping_utils.py:1963 when the library encounters an invalid state.

Common situations: See trigger scenarios.

Understand the failure class

• Authentication and authorization failures — expired tokens, bad credentials, and missing scopes.

AI-assisted analysis of BerriAI/litellm@6c2dcb801b (2026-08-15). Data as JSON: /api/errors/9951d88ba77b68ef. Report an issue: GitHub.