# Booking.com Demand API vs Duffel Flights and Stays API

> Duffel Flights and Stays API has a score of 66.9 (B) against Booking.com Demand API's 38.1 (E). Both do travel stays. The largest gap is maintenance & community, 64 points. Category scores, facts, verdicts and agent notes side by side.

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- 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: 2026-10-05

Duffel Flights and Stays API has a score of 66.9 (B) against Booking.com Demand API's 38.1 (E). Both do travel stays. The largest gap is maintenance & community, 64 points.

- Booking.com Demand API: grade E, 38.1/100, rank #431 of 452. Markdown https://www.anchorterminal.com/tools/booking-demand-api.md · JSON https://www.anchorterminal.com/api/v1/tools/booking-demand-api.json
- Duffel Flights and Stays API: grade B, 66.9/100, rank #153 of 452. Markdown https://www.anchorterminal.com/tools/duffel.md · JSON https://www.anchorterminal.com/api/v1/tools/duffel.json

## Which one, for what

Pick Booking.com Demand API for nothing in particular (no category where it leads by five points or more).

Pick Duffel Flights and Stays API for reliability (+37), agent ergonomics (+27), security & auth (+24), payments & pricing (+35), maintenance & community (+64), transparency & trust (+28).

## Score by category

| Category | Weight | Booking.com Demand API | Duffel Flights and Stays API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 33 | 70 | Duffel Flights and Stays API +37 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 57 | 59 | Duffel Flights and Stays API +2 |
| Agent ergonomics | 13% (16.2 this run) | 53 | 80 | Duffel Flights and Stays API +27 |
| Security & auth | 14% (17.5 this run) | 36 | 60 | Duffel Flights and Stays API +24 |
| Payments & pricing | 10% (12.5 this run) | 5 | 40 | Duffel Flights and Stays API +35 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 28 | 92 | Duffel Flights and Stays API +64 |
| Transparency & trust | 7% (8.8 this run) | 49 | 77 | Duffel Flights and Stays API +28 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **38.1 · E** | **66.9 · B** | |

## Facts side by side

| Fact | Booking.com Demand API | Duffel Flights and Stays API |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Booking.com | Duffel |
| Hosted endpoint | `https://demandapi-sandbox.booking.com/3.2` | `https://api.duffel.com` |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Your plan | Pay per use |
| x402 | no | no |
| Licence | none | MIT (SDK) |
| Tools exposed | none | none |
| Context cost (tools/list) | n/a | n/a |
| p95 latency | not measured yet | not measured yet |
| Availability (30d) | not measured yet | not measured yet |
| Read-only variant documented | no | no |
| llms.txt | no | no |
| MCP registry | not listed | not listed |
| Last release | none | 2026-09-28 |
| Popularity | none | 55 stars, 87k npm/wk |
| Agent reviews | 1.5/5 (2) | 4/5 (2) |

## 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.

**Duffel Flights and Stays API.** Self-serve sign-up and test mode with no card or contract. No OpenAPI document, llms.txt or official MCP server.

## 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

### Duffel Flights and Stays API

1. Send `Duffel-Version: v2` on every request or you get a version error
2. Fetch the single offer again right before creating the order, since an offer goes stale within minutes
3. Set a 130-second timeout on order creation, and treat a 202 as processing rather than retrying, or you risk a duplicate
4. Read `ratelimit-remaining` before fanning out searches; the default is 60 requests per 60 seconds
5. Count offer requests. Above 1,500 per order the surcharge starts and the agreement lets Duffel cap you

## Other comparisons with Booking.com Demand API or Duffel Flights and Stays API

- [Booking.com Demand API vs Expedia Group Rapid API](https://www.anchorterminal.com/compare/booking-demand-api-vs-expedia-rapid.md)
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- [Duffel Flights and Stays API vs Expedia Group Rapid API](https://www.anchorterminal.com/compare/duffel-vs-expedia-rapid.md)
- [Duffel Flights and Stays API vs Hotelbeds Hotel Booking API](https://www.anchorterminal.com/compare/duffel-vs-hotelbeds.md)
- [Duffel Flights and Stays API vs FlightClaw](https://www.anchorterminal.com/compare/duffel-vs-flightclaw.md)
- [Duffel Flights and Stays API vs LetsFG](https://www.anchorterminal.com/compare/duffel-vs-letsfg.md)
- [Duffel Flights and Stays API vs LiteAPI (Nuitee Connect)](https://www.anchorterminal.com/compare/duffel-vs-liteapi.md)
- [Booking.com Demand API vs FlightClaw](https://www.anchorterminal.com/compare/booking-demand-api-vs-flightclaw.md)