anth-webhooks-events

# Anthropic Events & Async Processing ## Overview The Claude API does not use traditional webhooks. Instead it provides two event-driven patterns: Server-Sent Events (SSE) for real-time streaming and the Message Batches API for async bulk processing. This skill covers both. ## SSE Streaming Events ```python import anthropic client = anthropic.Anthropic() # Process each SSE event type with client.messages.stream( model="claude-sonnet-4-20250514", max_tokens=1024, messages=[{"role": "user", "content": "Explain microservices."}] ) as stream: for event in stream: match event.type: case "message_start": print(f"Started: {event.message.id}") case "content_block_start": if event.content_block.type == "tool_use": print(f"Tool call: {event.content_block.name}") case "content_block_delta": if event.delta.type == "text_delta": print(event.delta.text, end="", flush=True) elif event.delta.type == "input_json_delta": print(event.delta.partial_json, end="") case "message_delta": print(f"\nStop: {event.delta.stop_reason}") print(f"Output tokens: {event.usage.output_tokens}") case "message_stop": print("[Complete]") ``` ## SSE Event Reference | Event | When | Key Data | |-------|------|----------| | `message_start` | Stream begins | ...