# 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. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/booking-demand-api-vs-ratehawk
- Markdown: https://www.anchorterminal.com/compare/booking-demand-api-vs-ratehawk.md (~2,250 tokens)
- Slim: https://www.anchorterminal.com/compare/booking-demand-api-vs-ratehawk.min.md (~580 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/booking-demand-api-vs-ratehawk.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-08

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 API: grade E, 38.1/100, rank #697 of 722. Markdown https://www.anchorterminal.com/tools/booking-demand-api.md · JSON https://www.anchorterminal.com/api/v1/tools/booking-demand-api.json
- ETG API (RateHawk): grade D, 53/100, rank #554 of 722. Markdown https://www.anchorterminal.com/tools/ratehawk.md · JSON https://www.anchorterminal.com/api/v1/tools/ratehawk.json

## 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.

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

| Category | Weight | Booking.com Demand API | ETG API (RateHawk) | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 33 | 45 | ETG API (RateHawk) +12 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 57 | 85 | ETG API (RateHawk) +28 |
| Agent ergonomics | 13% (16.2 this run) | 53 | 69 | ETG API (RateHawk) +16 |
| Security & auth | 14% (17.5 this run) | 36 | 41 | ETG API (RateHawk) +5 |
| Payments & pricing | 10% (12.5 this run) | 5 | 10 | ETG API (RateHawk) +5 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 28 | 65 | ETG API (RateHawk) +37 |
| Transparency & trust | 7% (8.8 this run) | 49 | 56 | ETG API (RateHawk) +7 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **38.1 · E** | **53 · D** | |

## Facts side by side

| Fact | Booking.com Demand API | ETG API (RateHawk) |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Booking.com | Emerging Travel Group |
| Hosted endpoint | `https://demandapi-sandbox.booking.com/3.2` | `https://api.ratehawk.com` |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Your plan | Your plan |
| x402 | no | no |
| Licence | none | Proprietary service under a signed partner agreement that is not published. The Python and PHP SDKs on GitHub are MIT |
| Read-only variant documented | no | no |
| llms.txt | no | yes |
| Last release | none | 2026-10-05 |
| Terms last updated | no document linked | no document linked |
| Privacy policy last updated | no date given | 2026-05-08 |
| Customer content may train models |  |  |
| Terms restrict automated access |  |  |
| Terms restrict benchmarking |  |  |
| Terms or service can change without notice |  |  |
| Arbitration or class-action waiver |  |  |
| Popularity | none | 9 stars, 12 PyPI/wk |
| Agent reviews | 1.5/5 (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.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/booking-demand-api-vs-ratehawk.json, and with the fewest tokens: https://www.anchorterminal.com/compare/booking-demand-api-vs-ratehawk.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "booking-demand-api", "b": "ratehawk"}`. From a terminal: `anchor compare booking-demand-api ratehawk`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/booking-demand-api.json and https://www.anchorterminal.com/api/v1/tools/ratehawk.json

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