AI agents are shipping to production fast — but most have no checkpoint before taking irreversible actions. The Handover is a REST API that adds human-in-the-loop approval to any AI agent, in any language, in under 5 minutes. Your agent calls one endpoint with the proposed action. The designated approver gets a notification via email or Slack with one-click Approve / Deny buttons — no login required. The agent gets the decision back via polling or webhook callback. Built for developers building with LangChain, CrewAI, OpenAI, Claude, n8n, or raw HTTP. Every decision is logged with who was asked, when, what they decided, and why — ready for EU AI Act Article 14 compliance. Features: multi-channel notifications, escalation chains, auto-action rules, custom email branding, webhook callbacks, and full audit trail export. Free to start. No credit card required.