Klook Open API (OCTO)

Klook's Open API specification for merchants, suppliers, reservation systems and channel managers. It is an implementation of the OCTO 1.0 standard: the supplier exposes the core Supplier, Products, Availability and Bookings endpoints and Klook calls them as the reseller. Bearer-token authentication, JSON over HTTPS, with optional behaviour negotiated per-request through the Octo-Capabilities header (octo/pricing, octo/content, octo/pickups, octo/webhooks).