# Tickitto > Tickitto is a B2B ticketing marketplace API that lets brands and platforms sell event tickets to their own customers. Its availability-aware, fully transactional REST API spans 90,000+ events globally and ships an embeddable, white-label Ticket Selection Widget so integrators avoid building bespoke seating maps and selection UIs. Distributors keep their customer and data ownership while Tickitto tracks commission. ## API - [Developer Docs](https://docs.tickitto.com): Guides, key principles, and endpoint reference. - [API Reference — Overview](https://docs.tickitto.com/key-principles/overview): What the API does and how the Widget fits in. - [Authentication](https://docs.tickitto.com/key-principles/authentication): API key in the `key` request header; HTTPS only. - [API Semantics](https://docs.tickitto.com/key-principles/api-semantics): REST, resource-oriented URLs under tickitto.tech, JSON responses. - [Errors](https://docs.tickitto.com/key-principles/errors): Conventional HTTP status codes and a structured error envelope. - [System Status](https://docs.tickitto.com/system-status/overview): GET /api/status health check. ## Specs - [OpenAPI (production)](https://tickitto.tech/openapi.json): OpenAPI 3.0.1, 22 operations. - [OpenAPI (development)](https://dev.tickitto.tech/openapi.json): Development environment service description. ## Concepts - [Events](https://docs.tickitto.com/events/overview): Inventory model and the four admission types (open_entry, date_entry, slot_entry, timed_entry). - [Availability & Widget](https://docs.tickitto.com/availability/overview): Availability instances and the Ticket Selection Widget. - [Basket](https://docs.tickitto.com/basket/overview): Baskets, 15-minute reservation ttl, checkout. ## Company - [Website](https://tickitto.com) - [Solutions](https://tickitto.com/solutions) - [Blog](https://tickitto.com/blog) - [Terms & Conditions](https://tickitto.com/terms-and-conditions) - [Privacy Policy](https://tickitto.com/privacy-policy)