Travel and hospitality is a mid-sized vertical in the catalog — 84 providers, 430 APIs — and one of the most API-dependent industries there is, because nothing in travel happens without one system talking to another. The catalog shows a domain split cleanly across the things you book: flights, stays, and tables.
The bands
| Band | What it does | Providers on apis.io |
|---|---|---|
| Air travel | Flights, booking, cargo | CHAMP Cargosystems (34 APIs), Airlabs (11), Duffel (9) |
| Restaurants & food service | POS, ordering, delivery | Toast (16), Olo (12) |
| Travel commerce & loyalty | Booking, rewards, marketplaces | Rakuten (30) |
What’s shifted recently
- Flight booking got a modern contract. Duffel models the whole journey — offer requests, offers, orders, changes, cancellations, payments — as a clean state machine, a deliberate break from the legacy GDS systems that dominated airline distribution for decades. It’s the clearest sign that even the most entrenched corner of travel is being rebuilt API-first.
- Restaurants became platforms. Toast and Olo expose point-of-sale, menus, online ordering, and delivery as APIs, turning the restaurant into an integration surface. The table is now as programmable as the flight — orders, loyalty, and kitchen systems all reachable through a contract.
- Flight data separated from booking. Providers like Airlabs expose schedules, status, and tracking as pure data APIs, distinct from the transactional booking flow. That split — real-time data on one side, transactions on the other — is the same control-plane / data-plane pattern showing up across the catalog.
Where to start
- The Travel and Hospitality industry page ranks all 84 providers.
- For modern flight booking, study Duffel.
- For the restaurant stack, compare Toast and Olo.
The takeaway
Travel is a vertical organized entirely around the transaction — you book a flight, a room, a table — and the catalog’s structure mirrors that. Read it by what’s being booked: air travel is being modernized off legacy rails, restaurants are becoming programmable platforms, and the data layer is peeling away from the booking layer. It’s one of the few industries where APIs aren’t a new efficiency but the thing the whole business has always run on.