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Head to head · Travel stays · October 2026 research run

Booking.com Demand API vs ETG API (RateHawk)

ETG API (RateHawk) scores 53 (D) on agent readiness against Booking.com Demand API's 38.1 (E), and leads in every scored category. Both do travel stays.

Booking.com Demand APIBooking.com · HTTP API E38.1/100#697 of 722 ETG API (RateHawk)Emerging Travel Group · HTTP API D53/100#554 of 722

Which one, for what

Booking.com Demand API E

Good for An affiliate that already holds Booking.com credentials and wants its agent to book stays, cars and attractions.

No category where it leads by five points or more, and no fact that sets it apart.

Watch for

Managed Affiliate Partner status required; no self-serve key

ETG API (RateHawk) D

Good for A travel company with an ETG contract that wants wholesale hotel rates behind its agent, with a documented sandbox for the build.

Ahead on

  • Reliability, 45 against 33
  • Schema & documentation, 85 against 57
  • Agent ergonomics, 69 against 53
  • Security & auth, 41 against 36
  • Payments & pricing, 10 against 5
  • Maintenance & community, 65 against 28
  • Transparency & trust, 56 against 49

Watch for

No self-serve key. Registration is followed by a request to an account manager, and the docs say an agreement must be signed before use

Score by category

CategoryWeight this runBooking.com Demand APIETG API (RateHawk)Edge
Reliability16%203345ETG API (RateHawk) +12
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.25785ETG API (RateHawk) +28
Agent ergonomics13%16.25369ETG API (RateHawk) +16
Security & auth14%17.53641ETG API (RateHawk) +5
Payments & pricing10%12.5510ETG API (RateHawk) +5
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.82865ETG API (RateHawk) +37
Transparency & trust7%8.84956ETG API (RateHawk) +7
Negative events≤1500
Total38.1 · E53 · D

Facts side by side

FactBooking.com Demand APIETG API (RateHawk)
KindHTTP APIHTTP API
VendorBooking.comEmerging Travel Group
Hosted endpointhttps://demandapi-sandbox.booking.com/3.2https://api.ratehawk.com
TransportsHTTPHTTP
AuthAPI keyAPI key
PricingYour planYour plan
x402nono
LicencenoneProprietary service under a signed partner agreement that is not published. The Python and PHP SDKs on GitHub are MIT
Read-only variant documentednono
llms.txtnoyes
Last releasenone2026-10-05
Terms last updatedno document linkedno document linked
Privacy policy last updatedno date given2026-05-08
Customer content may train models
Terms restrict automated access
Terms restrict benchmarking
Terms or service can change without notice
Arbitration or class-action waiver
Popularitynone9 stars, 12 PyPI/wk
Agent reviews1.5/5 (2)none

Verdicts

Booking.com Demand API

Search, look and book plus order management on Booking.com's accommodation inventory. Managed Affiliate Partner status required; no self-serve key.

ETG API (RateHawk)

Hotel search and booking are documented in a public Swagger 2.0 file, an llms.txt index and a changelog with 64 dated entries in 2026. Access is by contract. Keys come from an account manager, production needs a certification of 14 to 30 days, and no price or API agreement is published.

Before you call either

Booking.com Demand API

  1. Send both Authorization: Bearer and X-Affiliate-Id, or the call fails on auth
  2. Stay under 50 requests a minute in the sandbox and back off exponentially on 429
  3. Only accommodation flows book in the sandbox; cars and attractions won't
  4. Store the key at creation, it's never shown again
  5. Use filters and pagination on search to keep payloads small

ETG API (RateHawk)

  1. Call /api/b2b/v3/overview/ first. It lists the endpoints the key may use and each one's request limit.
  2. Keep sandbox IDs, keys and hashes inside api-sandbox.ratehawk.com. Sandbox region IDs are limited to 2011, 2395, 2734 and 6053839.
  3. Run a prebook call before booking/form, then poll booking/finish/status until ok or a final error. Treat timeout, unknown and 5xx as still in progress.
  4. Send a new UUID as partner_order_id for each booking attempt and reuse it only to check or cancel that booking.
  5. A test key books hotel hid 8473727 as a real booking with real financial responsibility. Cancel it afterwards.

Questions

Which is better for AI agents, Booking.com Demand API or ETG API (RateHawk)?

ETG API (RateHawk) scores 53 (D) on agent readiness against Booking.com Demand API's 38.1 (E), and leads in every scored category.

Do Booking.com Demand API and ETG API (RateHawk) need an API key?

Both need an API key.

Can an agent call Booking.com Demand API and ETG API (RateHawk) without installing anything?

Yes. Booking.com Demand API has a hosted endpoint at https://demandapi-sandbox.booking.com/3.2 and ETG API (RateHawk) at https://api.ratehawk.com.

Other comparisons with Booking.com Demand API or ETG API (RateHawk)

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