BerriAI/litellm · error · A2AError

A2A error: {error.get('message', 'Unknown error')}

Error message

A2A error: {error.get('message', 'Unknown error')}

What it means

Error "A2A error: {error.get('message', 'Unknown error')}" thrown in BerriAI/litellm.

Source

Thrown at litellm/llms/a2a/chat/transformation.py:289

            api_key: API key
            json_mode: JSON mode flag

        Returns:
            Populated ModelResponse object
        """
        try:
            response_json: Final = raw_response.json()
        except Exception as e:
            raise A2AError(
                status_code=raw_response.status_code,
                message=f"Failed to parse A2A response: {e}",
                headers=dict(raw_response.headers),
            )

        # Check for JSON-RPC error
        if "error" in response_json:
            error: Final = response_json["error"]
            raise A2AError(
                status_code=raw_response.status_code,
                message=f"A2A error: {error.get('message', 'Unknown error')}",
                headers=dict(raw_response.headers),
            )

        # Extract text from A2A response
        text: Final = extract_text_from_a2a_response(response_json)

        # Populate model response
        model_response.choices = [
            Choices(
                finish_reason="stop",
                index=0,
                message=Message(
                    content=text,
                    role="assistant",
                ),
            )

View on GitHub (pinned to 6c2dcb801b)

Solutions

1. Inspect the A2A error message returned by the agent.

When it happens

Trigger: Thrown at litellm/llms/a2a/chat/transformation.py:289 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/6bb94d8f1ecfbe67. Report an issue: GitHub.