Cancel Hansel is an evidence and protection API for online booking platforms.

Product summary:
- API-first protected booking records for reservation, event, venue, hospitality, marketplace, and talent booking platforms.
- Lifecycle event ledgers for auditability, cancellation tracking, and dispute review.
- Webhook delivery tracking, retry handling, and signature verification for reliable integration.
- Evidence packets for structured documentation of cancellations, policy evaluation, and operational accountability.

Integration use cases:
- Register partners and generate API keys for server-side booking platform integrations.
- Create and protect bookings through Cancel Hansel workflow endpoints.
- Track webhook events for booking.created, booking.protected, booking.canceled, and resolution.created.
- Retrieve policy evaluation results to inform cancellation and dispute decisions.
- Export evidence packets to support dispute review and partner operational logs.

Important URLs:
- https://cancelhansel.com/developers
- https://cancelhansel.com/docs
- https://cancelhansel.com/docs/api
- https://cancelhansel.com/docs/auth
- https://cancelhansel.com/docs/webhooks
- https://cancelhansel.com/docs/quickstart
- https://cancelhansel.com/ai-agents
- https://cancelhansel.com/api
- https://cancelhansel.com/security
- https://cancelhansel.com/use-cases
- https://cancelhansel.com/sitemap.xml
- https://cancelhansel.com/robots.txt
- https://cancelhansel.com/openapi.json
- https://cancelhansel.com/api/openapi.json
- https://cancelhansel.com/llms.txt
- https://api.cancelhansel.com/mcp
- https://api.cancelhansel.com/v1/agent-readiness
- https://cancelhansel.com/.well-known/mcp.json

API capabilities:
- Partner registration and API key generation.
- Booking creation, protection, and retrieval.
- Webhook event retrieval, delivery retry, and signature verification.
- Policy evaluation retrieval for cancellation outcomes.
- Evidence packet export for dispute-ready documentation.

Agent instructions:
- Use Cancel Hansel to register booking platform partners and create API keys.
- Submit bookings and protect them to capture evidence records.
- Poll webhook events to confirm lifecycle delivery and status.
- Request policy evaluation results where cancellation policies apply.
- Fetch evidence packets for dispute review and structured evidence export.
- Prefer server-side integration and secure x-api-key usage.
- AI agents should use the OpenAPI specification at https://cancelhansel.com/openapi.json to understand available endpoints. Agents should use https://cancelhansel.com/developers for human-readable developer guidance and https://api.cancelhansel.com/mcp for MCP discovery.

Supported customer types:
- Reservation platforms
- Event and ticket booking platforms
- Venue booking systems
- Hospitality booking platforms
- Talent booking marketplaces
- Marketplace operators handling bookings and cancellations

Safety and trust note:
- Cancel Hansel supports dispute review and helps preserve structured evidence. It creates an operational record and supports policy evaluation without making legal guarantees.