LetsFG MCP工具

Try it right now — no install needed

Human users: Use letsfg.co and search flights instantly in your browser: <div align="center">

Install

| Package | Command | What you get | |---------|---------|--------------| | Python SDK + CLI | pip install letsfg | SDK + CLI (run letsfg auth once for free search) | | MCP Server | npx letsfg-mcp | Claude, Cursor, Windsurf (run letsfg auth once) | | JS/TS SDK | npm install -g letsfg | SDK + CLI + open-source ranking engine | | Remote MCP | https://letsfg.co/developers/api/mcp | No install (API key required) | | Agent Skill | npx skills add LetsFG/LetsFG | Install flight search skill for any AI agent (skills.sh) | | Smithery | smithery.ai/servers/letsfg | One-click MCP install | ---

Reads LETSFG_BEARER_TOKEN env var or ~/.letsfg/config.json (set by `letsfg auth`)

result = await search_local("GDN", "BCN", "2026-06-15") for offer in result.offers[:5]: print(f"{offer.airlines[0]}: {offer.currency} {offer.price}") ``` ---

🖥️ CLI / SDK — free, one-time auth

pip install letsfg
letsfg auth          # one-time Twitter/X challenge → 90-day Bearer token
letsfg search LHR BCN 2026-06-15

letsfg search LHR JFK 2026-06-15 --cabin C   # cabin class: M economy, W premium, C business, F first

⚡ Developer API — paid, server-side, direct booking URLs

For products and teams. Prepaid credits, results in seconds, direct airline booking URLs with no concierge fee — plus /discover (20 destinations in one call, 1 credit), async polling, NL query parsing, and a free sandbox. ```bash

Register, then search with your API key

curl -X POST https://letsfg.co/developers/api/v1/agents/register \ -H "Content-Type: application/json" \ -d '{"agent_name":"my-agent","email":"you@example.com"}' curl -X POST https://letsfg.co/developers/api/v1/flights/search \ -H "X-API-Key: trav_..." \ -H "Content-Type: application/json" \ -d '{"origin":"LHR","destination":"BCN","date_from":"2026-06-15"}'

Pricing: $0.50/search for the first 10 each month, $0.20 for 11–1,000, $0.10 beyond. Minimum top-up $5. Test for free in the sandbox first. Full docs: [letsfg.co/developers/api/docs](https://letsfg.co/developers/api/docs).

<details>
<summary><strong>Full search → unlock → book flow</strong></summary>

Python SDK

from letsfg import LetsFG

bt = LetsFG()  # reads LETSFG_API_KEY from env
flights = bt.search("LHR", "JFK", "2026-04-15")
print(f"{flights.total_results} offers, cheapest: {flights.cheapest.summary()}")

JavaScript SDK

import { LetsFG } from 'letsfg';

const bt = new LetsFG({ apiKey: 'trav_...' });
const flights = await bt.search('LHR', 'JFK', '2026-04-15');
console.log(`${flights.totalResults} offers`);

Python SDK (cloud search)

```python from letsfg.local import search_local

CLI Commands

| Command | Description | |---------|-------------| | letsfg auth | One-time Twitter/X challenge → saves 90-day Bearer token | | letsfg search <origin> <dest> <date> | Search flights (free after letsfg auth) | | letsfg register | Register an account for the Developer API | | letsfg setup-payment | Attach a payment method (required for unlock) | | letsfg recover --email <email> | Recover lost API key via email | | letsfg locations <query> | Resolve city/airport to IATA codes | | letsfg unlock <offer_id> | Confirm live price & pay unlock fee (1% of ticket, min $3) | | letsfg book <offer_id> | Book the flight | | letsfg me | View profile & usage stats | All commands accept --json for structured output and --api-key to override the env variable. ---

CLI / SDK / MCP (free, cloud-backed)

letsfg auth (once) → Bearer token (90-day) → Search (free) → Unlock & Book via letsfg.co

PFS — raw API (same as CLI, without the wrapper)

Twitter/X challenge → Bearer token (90-day) → POST /api/search → poll GET /api/results/<id>

Developer API — paid, direct booking URLs

Register → Fund balance → Discover or Search (credits) → Direct booking URL (no checkout)

Real prices: LetsFG vs Google Flights

We searched 5 routes on Google Flights and LetsFG on the same day (June 15, 2026). Same airline, same itinerary — LetsFG was cheaper every time: | Route | Airline | Google Flights | LetsFG | You Save | |-------|---------|---------------|--------|----------| | LAX → Paris (CDG) | WestJet, 1 stop | $723 | $687 | $36 | | Warsaw → Bali (DPS) | Etihad, 1 stop | $876 | $842 | $34 | | SFO → London (LHR) | WestJet, 1 stop | $669 | $636 | $33 | | Chicago → Miami | Spirit, nonstop | $120 | $114 | $6 | | London → Barcelona | Vueling, nonstop | $62 | $56 | $6 | | LA → New York (JFK) | Frontier, 1 stop | $125 | $124 | $1 | > $116 saved across 6 flights. Google Flights inflates further on repeat searches. LetsFG returns the raw airline price every time. Why the difference? Google Flights only searches its own limited set of airline partners. LetsFG searches everywhere — Skyscanner, Kiwi, Kayak, Momondo, plus direct airline websites (Ryanair, United, Southwest, EasyJet, Spirit, Norwegian, AirAsia, and hundreds more). More sources = better prices. And unlike travel websites, LetsFG returns the raw price with zero markup, no tracking, no inflation. ---