Learn the booking, webhook, and policy evaluation endpoints with examples and response details.
Cancel Hansel is the evidence and protection API for online booking platforms. It helps reservation, event, venue, hospitality, marketplace, and talent booking platforms create protected booking records, evaluate cancellation policies, track webhook delivery, and generate evidence packets for disputes and operational accountability.
This documentation supports developers, platform operators, and AI agents integrating booking protection workflows. It clarifies how to use Cancel Hansel endpoints for partner registration, authentication, booking protection, webhook tracking, policy evaluation, and evidence packet export.
Learn the booking, webhook, and policy evaluation endpoints with examples and response details.
Understand API key lifecycle, server-side storage, and webhook signature verification.
Track delivery status, handle retries, and validate payload signatures for booking lifecycle events.
Follow an end-to-end sandbox flow from partner onboarding through evidence packet export.
Review API key protection, webhook signature integrity, and responsible integration practices.
See how reservation, event, venue, hospitality, talent, and marketplace operators use Cancel Hansel.
Download the OpenAPI definition for client generation and AI agent discovery.
Use the MCP manifest for agent-aware automation and tool discovery.