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 SSE Event Reference | Event | When | Key Data | |-------|------|----------| | | Stream begins | , , | | | New block begins | (text or tool use), | | | Incremental content | or | | | Block finishes | | | | Message-level update | , | | | Stream complete | (empty) | | | Keepalive | (empty) | Async Batch Proces…