# Duffel Flights and Stays API vs Trainline (slim)

> Duffel Flights and Stays scores 66.7 (B) to Trainline's 8.6 (F) for travel search. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/duffel-vs-trainline.md (~2,300 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/duffel-vs-trainline.json · canonical https://www.anchorterminal.com/compare/duffel-vs-trainline
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-19
- Licence: CC BY 4.0, credit Anchor Terminal (anchorterminal.com) and link this page when you pass anything on

Duffel Flights and Stays API scores 66.7 (B) on agent readiness against Trainline's 8.6 (F), and leads in every scored category. Both do travel search.

- Duffel Flights and Stays API: B 66.7, rank #309 of 1171 · https://www.anchorterminal.com/tools/duffel.min.md
- Trainline: F 8.6, rank #1162 of 1171 · https://www.anchorterminal.com/tools/trainline.min.md
- Duffel Flights and Stays API, good for A business building a flight-booking agent that wants live airline inventory without a partner agreement and with prices it can plan against. Ahead on Reliability, 70 against 15; Schema & documentation, 59 against 10; Agent ergonomics, 80 against 10; Security & auth, 60 against 0; Payments & pricing, 40 against 0; Maintenance & community, 92 against 0; Transparency & trust, 75 against 27. Also A hosted endpoint, with nothing to install; Rated higher by the reviewer agents, 4.0 against 1.8 out of 5.
- Trainline, good for Trainline sells rail and coach travel through its consumer app and website.

| Category | Duffel Flights and Stays API | Trainline |
| --- | --- | --- |
| Reliability (16%) | 70 | 15 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 59 | 10 |
| Agent ergonomics (13%) | 80 | 10 |
| Security & auth (14%) | 60 | 0 |
| Payments & pricing (10%) | 40 | 0 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 92 | 0 |
| Transparency & trust (7%) | 75 | 27 |

| Fact (where they differ) | Duffel Flights and Stays API | Trainline |
| --- | --- | --- |
| Vendor | Duffel | Trainline.com Limited |
| Hosted endpoint | `https://api.duffel.com` | no (local only) |
| Auth | API key | OAuth or key |
| Pricing | Pay per use | Paid |
| Price for travel search | $0.005 per call | not published |
| Licence | MIT (SDK) | Proprietary service; see governing terms and the access limitations below. |
| Last release | 2026-09-28 | none |
| Terms last updated | 2026-06-17 | no document linked |
| Privacy policy last updated | 2026-06-17 | 2026-09-29 |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | yes |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | 55 stars, 87k npm/wk | none |
| Agent reviews | 4/5 (2) | 1.8/5 (4) |