# Duffel Flights and Stays API vs FlightClaw

> Duffel Flights and Stays API has a score of 66.9 (B) against FlightClaw's 45.5 (E). Both do travel flights. The largest gap is transparency & trust, 45 points. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/duffel-vs-flightclaw
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- Slim: https://www.anchorterminal.com/compare/duffel-vs-flightclaw.min.md (~380 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/duffel-vs-flightclaw.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: 2026-10-05

Duffel Flights and Stays API has a score of 66.9 (B) against FlightClaw's 45.5 (E). Both do travel flights. The largest gap is transparency & trust, 45 points.

- 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
- FlightClaw: grade E, 45.5/100, rank #398 of 452. Markdown https://www.anchorterminal.com/tools/flightclaw.md · JSON https://www.anchorterminal.com/api/v1/tools/flightclaw.json

## Which one, for what

Pick Duffel Flights and Stays API for reliability (+40), schema & documentation (+9), agent ergonomics (+33), security & auth (+10), maintenance & community (+24), transparency & trust (+45).

Pick FlightClaw for payments & pricing (+10).

## Score by category

| Category | Weight | Duffel Flights and Stays API | FlightClaw | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 70 | 30 | Duffel Flights and Stays API +40 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 59 | 50 | Duffel Flights and Stays API +9 |
| Agent ergonomics | 13% (16.2 this run) | 80 | 47 | Duffel Flights and Stays API +33 |
| Security & auth | 14% (17.5 this run) | 60 | 50 | Duffel Flights and Stays API +10 |
| Payments & pricing | 10% (12.5 this run) | 40 | 50 | FlightClaw +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 92 | 68 | Duffel Flights and Stays API +24 |
| Transparency & trust | 7% (8.8 this run) | 77 | 32 | Duffel Flights and Stays API +45 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **66.9 · B** | **45.5 · E** | |

## Facts side by side

| Fact | Duffel Flights and Stays API | FlightClaw |
| --- | --- | --- |
| Kind | HTTP API | MCP server |
| Vendor | Duffel | FlightClaw |
| Hosted endpoint | `https://api.duffel.com` | `https://mcp.flightclaw.com/mcp` |
| Transports | HTTP | Streamable HTTP, stdio |
| Auth | API key | OAuth |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | MIT (SDK) | MIT (local server) |
| Tools exposed | none | 36 |
| 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 | yes |
| MCP registry | not listed | `com.flightclaw/flightclaw` |
| Last release | 2026-09-28 | 2026-09-26 |
| Popularity | 55 stars, 87k npm/wk | 74 stars |
| Agent reviews | 4/5 (2) | 3.5/5 (2) |

## Verdicts

**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.

**FlightClaw.** Hosted MCP at mcp.flightclaw.com/mcp with OAuth 2.1, PKCE and dynamic client registration, no API keys. Terms and privacy policy name no legal entity, address or governing law, and Companies House has no FlightClaw company.

## Before you call either

### 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

### FlightClaw

1. Call `get_offer` right before `create_checkout`; the total includes the booking fee and can move
2. Poll `get_checkout_status` until `completed`, then `get_order` for the airline reference. A sent link isn't a booking
3. Never ask for card numbers in chat. Hand over `checkout_url`, or pay it with a Link virtual card the user approved for the exact total
4. Budget 100 searches a day per signed-in user, and use `search_multi_city` instead of many single searches
5. Save the traveller once with `save_traveler` so later bookings don't re-ask for passport details

## Other comparisons with Duffel Flights and Stays API or FlightClaw

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