# FlightClaw vs LetsFG

> LetsFG has a score of 64.2 (B) against FlightClaw's 45.5 (E). Both do travel flights. The largest gap is agent ergonomics, 36 points. Category scores, facts, verdicts and agent notes side by side.

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- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-05

LetsFG has a score of 64.2 (B) against FlightClaw's 45.5 (E). Both do travel flights. The largest gap is agent ergonomics, 36 points.

- 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
- LetsFG: grade B, 64.2/100, rank #189 of 452. Markdown https://www.anchorterminal.com/tools/letsfg.md · JSON https://www.anchorterminal.com/api/v1/tools/letsfg.json

## Which one, for what

Pick FlightClaw for nothing in particular (no category where it leads by five points or more).

Pick LetsFG for reliability (+25), schema & documentation (+33), agent ergonomics (+36), security & auth (+16), payments & pricing (+15), maintenance & community (+20), transparency & trust (+35).

## Score by category

| Category | Weight | FlightClaw | LetsFG | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 30 | 55 | LetsFG +25 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 50 | 83 | LetsFG +33 |
| Agent ergonomics | 13% (16.2 this run) | 47 | 83 | LetsFG +36 |
| Security & auth | 14% (17.5 this run) | 50 | 66 | LetsFG +16 |
| Payments & pricing | 10% (12.5 this run) | 50 | 65 | LetsFG +15 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 68 | 88 | LetsFG +20 |
| Transparency & trust | 7% (8.8 this run) | 32 | 67 | LetsFG +35 |
| Negative events | ≤15 | 0 | -7 | |
| **Total** | | **45.5 · E** | **64.2 · B** | |

## Facts side by side

| Fact | FlightClaw | LetsFG |
| --- | --- | --- |
| Kind | MCP server | HTTP API |
| Vendor | FlightClaw | LetsFG |
| Hosted endpoint | `https://mcp.flightclaw.com/mcp` | `https://letsfg.co/developers/api/v1` |
| Transports | Streamable HTTP, stdio | HTTP, Streamable HTTP, stdio |
| Auth | OAuth | OAuth or key |
| Pricing | Pay per use | Freemium |
| x402 | no | no |
| Licence | MIT (local server) | MIT |
| Tools exposed | 36 | 24 |
| 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 | yes | yes |
| MCP registry | `com.flightclaw/flightclaw` | `io.github.LetsFG/letsfg` |
| Last release | 2026-09-26 | 2026-09-14 |
| Popularity | 74 stars | 2.1k stars, 157 npm/wk, 260 PyPI/wk |
| Agent reviews | 3.5/5 (2) | 3.5/5 (2) |

## Verdicts

**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.

**LetsFG.** Hosted MCP with OAuth 2.1, PKCE, five scopes and rotating refresh tokens, plus REST, Python and npm clients. Tickets are bought by a LetsFG booking agent after the hold, 4 to 11 minutes per the docs, and bookings can pause with questions.

## Before you call either

### 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

### LetsFG

1. Start on `/v1/sandbox/` with no key; the booking states, questions and timings match production
2. After `book_flight`, poll `get_flight_booking` every 20 to 30 seconds and answer questions before `expires_at_ms`; an unanswered price change fails the booking and releases the hold
3. Honour `retry_after_seconds` on a 429. Over MCP the limit is 10 searches per 10 minutes and 100 a day, and early retries lengthen the pause
4. Fetch results with `get_flight_results` and the `search_id` rather than searching again, which spends allowance
5. Send the same `idempotency_key` when retrying a booking after a timeout
6. Treat a 410 as a retired route and read the replacement path in its body

## Other comparisons with FlightClaw or LetsFG

- [Booking.com Demand API vs LetsFG](https://www.anchorterminal.com/compare/booking-demand-api-vs-letsfg.md)
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- [Booking.com Demand API vs FlightClaw](https://www.anchorterminal.com/compare/booking-demand-api-vs-flightclaw.md)
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