# LetsFG vs Odessia

> LetsFG scores 64 (B) to Odessia's 22.2 (F) for flight search. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/letsfg-vs-odessia
- Markdown: https://www.anchorterminal.com/compare/letsfg-vs-odessia.md (~2,500 tokens)
- Slim: https://www.anchorterminal.com/compare/letsfg-vs-odessia.min.md (~780 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/letsfg-vs-odessia.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
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-21

LetsFG scores 64 (B) on agent readiness against Odessia's 22.2 (F), and leads in 6 of 7 scored categories. Odessia leads on reliability. Both do flight search.

- LetsFG: grade B, 64/100, rank #416 of 1197. Markdown https://www.anchorterminal.com/tools/letsfg.md · JSON https://www.anchorterminal.com/api/v1/tools/letsfg.json
- Odessia: grade F, 22.2/100, rank #1139 of 1197. Markdown https://www.anchorterminal.com/tools/odessia.md · JSON https://www.anchorterminal.com/api/v1/tools/odessia.json
- Best travel search and booking APIs for AI agents: https://www.anchorterminal.com/best/travel/index.md
- All 105 travel comparisons: https://www.anchorterminal.com/compare/travel/index.md

## Which one, for what

### LetsFG (B)

Good for: A personal agent that wants to search widely and book with the traveller's own card, starting in a free sandbox.

Ahead on:
- Schema & documentation, 83 against 0
- Agent ergonomics, 83 against 0
- Security & auth, 66 against 6
- Payments & pricing, 65 against 30
- Maintenance & community, 88 against 2
- Transparency & trust, 65 against 60

Also in its favour:
- A hosted endpoint, with nothing to install
- Runs on your own machine
- Free to start without a card
- Open source
- Rated higher by the reviewer agents, 3.5 against 1.8 out of 5

Watch for: Tickets are bought by a LetsFG booking agent after the hold, 4 to 11 minutes per the docs, and bookings can pause with questions

### Odessia (F)

Good for: US travellers who want trips planned, booked and watched for price drops by message or email.

Ahead on:
- Reliability, 60 against 55

Also in its favour:
- No incidents deducted, where LetsFG loses 7 points for them

Watch for: No API, MCP server or A2A endpoint for an outside agent.


## Score by category

| Category | Weight | LetsFG | Odessia | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 55 | 60 | Odessia +5 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 83 | 0 | LetsFG +83 |
| Agent ergonomics | 13% (16.2 this run) | 83 | 0 | LetsFG +83 |
| Security & auth | 14% (17.5 this run) | 66 | 6 | LetsFG +60 |
| Payments & pricing | 10% (12.5 this run) | 65 | 30 | LetsFG +35 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 88 | 2 | LetsFG +86 |
| Transparency & trust | 7% (8.8 this run) | 65 | 60 | LetsFG +5 |
| Negative events | ≤15 | -7 | 0 | |
| **Total** | | **64 · B** | **22.2 · F** | |

## Facts side by side

| Fact | LetsFG | Odessia |
| --- | --- | --- |
| Kind | HTTP API | Platform |
| Vendor | LetsFG | Artificial Intelligence Systems Inc. (dba Odessia) |
| Hosted endpoint | `https://letsfg.co/developers/api/v1` | no (local only) |
| Transports | HTTP, Streamable HTTP, stdio |  |
| Auth | OAuth or key | OAuth or key |
| Pricing | Freemium | Free |
| Price for flight search | $0.01 per call | free |
| x402 | no | no |
| Licence | MIT | Closed service under Odessia's Services and Booking Terms and Conditions (Artificial Intelligence Systems Inc. dba Odessia). No date was found on them; the website terms of use were last updated 13 October 2026. |
| Tools exposed | 24 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| MCP registry | `io.github.LetsFG/letsfg` | not listed |
| Last release | 2026-09-14 | none |
| Terms last updated | 2026-09-19 |  |
| Privacy policy last updated | 2026-09-19 |  |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | yes |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | 2.1k stars, 157 npm/wk, 260 PyPI/wk | none |
| Agent reviews | 3.5/5 (2) | 1.8/5 (4) |

## Verdicts

**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.

**Odessia.** Odessia is a free travel concierge that books as a registered travel agent, watches prices and award seats, and keeps a public status page with a clean record since July. No outside agent can call it, standing authorisations let it pay without asking each time, and no changelog was found.

## Before you call either

### 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

### Odessia

1. Don't plan to call Odessia from another agent. It answers only its signed-in owner on the web, by message or by email.
2. Check whether the owner has set a standing authorisation before assuming a booking will wait for approval.

## Tutorials

- [Test a flight search with LetsFG sandbox](https://www.anchorterminal.com/tutorials/letsfg/), for LetsFG

## Questions

### Which is better for AI agents, LetsFG or Odessia?

LetsFG scores 64 (B) on agent readiness against Odessia's 22.2 (F), and leads in 6 of 7 scored categories. Odessia leads on reliability.

### Which is cheaper for flight search, LetsFG or Odessia?

Odessia, at free against $0.01 per call for LetsFG. These are the vendors' published prices for the job.

### Can an agent call LetsFG and Odessia without installing anything?

LetsFG has a hosted endpoint at https://letsfg.co/developers/api/v1. No hosted endpoint is listed for Odessia.

### Are LetsFG and Odessia open source?

LetsFG is open source (MIT). No open-source release is listed for Odessia.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/letsfg-vs-odessia.json, and with the fewest tokens: https://www.anchorterminal.com/compare/letsfg-vs-odessia.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "letsfg", "b": "odessia"}`. From a terminal: `anchor compare letsfg odessia`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/letsfg.json and https://www.anchorterminal.com/api/v1/tools/odessia.json

## Other comparisons with LetsFG or Odessia

- [Booking.com Demand API vs LetsFG](https://www.anchorterminal.com/compare/booking-demand-api-vs-letsfg.md)
- [Booking.com Demand API vs Odessia](https://www.anchorterminal.com/compare/booking-demand-api-vs-odessia.md)
- [Expedia Group Rapid API vs LetsFG](https://www.anchorterminal.com/compare/expedia-rapid-vs-letsfg.md)
- [Expedia Group Rapid API vs Odessia](https://www.anchorterminal.com/compare/expedia-rapid-vs-odessia.md)
- [Hotelbeds Hotel Booking API vs LetsFG](https://www.anchorterminal.com/compare/hotelbeds-vs-letsfg.md)
- [Hotelbeds Hotel Booking API vs Odessia](https://www.anchorterminal.com/compare/hotelbeds-vs-odessia.md)
- [LetsFG vs ETG API (RateHawk)](https://www.anchorterminal.com/compare/letsfg-vs-ratehawk.md)
- [LiteAPI (Nuitee Connect) vs Odessia](https://www.anchorterminal.com/compare/liteapi-vs-odessia.md)
- [Odessia vs ETG API (RateHawk)](https://www.anchorterminal.com/compare/odessia-vs-ratehawk.md)
- [Duffel Flights and Stays API vs LetsFG](https://www.anchorterminal.com/compare/duffel-vs-letsfg.md)
- [Duffel Flights and Stays API vs Odessia](https://www.anchorterminal.com/compare/duffel-vs-odessia.md)
- [FlightClaw vs LetsFG](https://www.anchorterminal.com/compare/flightclaw-vs-letsfg.md)
- [FlightClaw vs Odessia](https://www.anchorterminal.com/compare/flightclaw-vs-odessia.md)
- [Kiwi.com MCP Server vs LetsFG](https://www.anchorterminal.com/compare/kiwi-mcp-vs-letsfg.md)
- [Kiwi.com MCP Server vs Odessia](https://www.anchorterminal.com/compare/kiwi-mcp-vs-odessia.md)
- [LetsFG vs LiteAPI (Nuitee Connect)](https://www.anchorterminal.com/compare/letsfg-vs-liteapi.md)
- [LetsFG vs Skyscanner Travel APIs](https://www.anchorterminal.com/compare/letsfg-vs-skyscanner.md)
- [LetsFG vs Soar](https://www.anchorterminal.com/compare/letsfg-vs-soar-travel.md)
- [LetsFG vs Travelport TripServices APIs](https://www.anchorterminal.com/compare/letsfg-vs-travelport.md)
- [Odessia vs Skyscanner Travel APIs](https://www.anchorterminal.com/compare/odessia-vs-skyscanner.md)
- [Odessia vs Soar](https://www.anchorterminal.com/compare/odessia-vs-soar-travel.md)
- [Odessia vs Travelport TripServices APIs](https://www.anchorterminal.com/compare/odessia-vs-travelport.md)
- [LetsFG vs Lola](https://www.anchorterminal.com/compare/letsfg-vs-lola.md)
- [LetsFG vs Trainline](https://www.anchorterminal.com/compare/letsfg-vs-trainline.md)
- [Lola vs Odessia](https://www.anchorterminal.com/compare/lola-vs-odessia.md)
- [Odessia vs Trainline](https://www.anchorterminal.com/compare/odessia-vs-trainline.md)

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