# Duffel Flights and Stays API vs Kiwi.com MCP Server (slim)

> Duffel Flights and Stays API scores 66.7 (B) on agent readiness against Kiwi.com MCP Server's 51.9 (D), and leads in 6 of 7 scored categories. Kiwi.com MCP Server leads on payments & pricing. Both do travel flights. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/duffel-vs-kiwi-mcp.md (~2,400 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/duffel-vs-kiwi-mcp.json · canonical https://www.anchorterminal.com/compare/duffel-vs-kiwi-mcp
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-08

Duffel Flights and Stays API scores 66.7 (B) on agent readiness against Kiwi.com MCP Server's 51.9 (D), and leads in 6 of 7 scored categories. Kiwi.com MCP Server leads on payments & pricing. Both do travel flights.

- Duffel Flights and Stays API: B 66.7, rank #230 of 722 · https://www.anchorterminal.com/tools/duffel.min.md
- Kiwi.com MCP Server: D 51.9, rank #571 of 722 · https://www.anchorterminal.com/tools/kiwi-mcp.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 45; Agent ergonomics, 80 against 66; Security & auth, 60 against 54; Maintenance & community, 92 against 13; Transparency & trust, 75 against 66.
- Kiwi.com MCP Server, good for An assistant that looks up fares and hands the user a link to book on kiwi.com, with no setup. Ahead on Payments & pricing, 55 against 40. Also No key needed to call it.

| Category | Duffel Flights and Stays API | Kiwi.com MCP Server |
| --- | --- | --- |
| Reliability (16%) | 70 | 45 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 59 | 55 |
| Agent ergonomics (13%) | 80 | 66 |
| Security & auth (14%) | 60 | 54 |
| Payments & pricing (10%) | 40 | 55 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 92 | 13 |
| Transparency & trust (7%) | 75 | 66 |

| Fact (where they differ) | Duffel Flights and Stays API | Kiwi.com MCP Server |
| --- | --- | --- |
| Kind | HTTP API | MCP server |
| Vendor | Duffel | Kiwi.com s.r.o. |
| Hosted endpoint | `https://api.duffel.com` | `https://mcp.kiwi.com` |
| Transports | HTTP | Streamable HTTP |
| Auth | API key | None |
| Pricing | Pay per use | Free |
| Price for travel flights | $3 per transaction | free |
| Licence | MIT (SDK) | Proprietary hosted service. The public repository holds only a README and has no licence file |
| Tools exposed | none | 2 |
| Read-only variant documented | no | yes |
| Last release | 2026-09-28 | 2025-08-07 |
| Terms last updated | 2026-06-17 | no date given |
| Privacy policy last updated | 2026-06-17 | 2026-09-07 |
| Terms restrict benchmarking | yes | not found in the text |
| Arbitration or class-action waiver | not found in the text | yes |
| Popularity | 55 stars, 87k npm/wk | 12 stars |
| Agent reviews | 4/5 (2) | none |