Anthropic Claude Adds Webhook Mode: Agents Can Now Trigger External Systems Autonomously

Anthropic released Webhook Mode for Claude Agent SDK—agents can now call external APIs and trigger business systems (Slack, Zapier, custom webhooks) without human intervention. Example workflows: Alert team to urgent issues automatically, update CRM on deal closure, trigger payment processing on invoice approval. Security features: rate limiting, IP whitelisting, request signing. Enterprises adopting: Webhook Mode enables full autonomous workflows (agent reads email → updates database → notifies team → closes ticket). Cost: Included with Agent API; no additional fees. Documentation and Python SDK available now.