Is There a KAYAK API?

KAYAK does list API products through the KAYAK Affiliate Network, including a Flights Search API. That is different from an instant, general-purpose public flight API: access is an affiliate or partner path where you get in touch and KAYAK decides whether your project fits.

If your real question is "can I create a key today and search live fares from my app?", Ignav is the self-serve route for that part: live flight prices and booking links through a small REST API.

What developers are usually trying to build

Most people asking for a KAYAK API are not trying to recreate KAYAK. They need date-and-route fare results, enough structure to sort and filter itineraries, and a link where the traveler can finish booking with an airline or OTA.

How Ignav covers fare search and links

• Self-serve access — sign up, verify your email, and use your API key. There is no partner application.
• Four endpoints — POST /api/fares/one-way, POST /api/fares/round-trip, POST /api/fares/booking-links, and GET /api/airports.
• Booking handoff — fare itineraries include an ignav_id. Pass it to booking links to get airline and OTA URLs.
• Simple billing — 1,000 free requests, then $2.00 per 1,000 successful requests. Failed requests are not billed, and authenticated API use has no per-account rate limit.

What Ignav does not cover

Ignav does not provide KAYAK affiliate products, KAYAK branding, widgets, whitelabel pages, or affiliate reporting. It also does not issue tickets, sell flights, manage bookings, or replace a ticketing API. Ignav is for fare search and booking-link handoff.