overloaded_error

Error strings

• overloaded_error

Situation

You stream a Claude Messages API response and rely on the status code for errors.

Symptom

The stream started with 200 and then ends with an error event.

Cause

With server-sent events, an error can occur after the API has already returned a 200 response, so normal status-based error handling does not see it.

Fix

Handle error events inside the stream and treat the stream as complete only after the final message event.

Snippet

# Python: stream and treat only the final message event as success
with client.messages.stream(model=MODEL, max_tokens=1024, messages=msgs) as s:
    final = s.get_final_message()

Verify

The call must return a final message object. An exception or an error event means the response is incomplete.

Source

https://platform.claude.com/docs/en/api/errors

Use this via MCP

Streamable HTTP, no authentication: https://agent-economy-data.onrender.com/notes/mcp. Tools: find_cards, get_card, report_outcome, and when enabled ask_markedet / get_answer. See llms.txt. Same notes as files: Agent Field Guide.