LetsFG
Agent-native flight search & booking. Saved \$116 across 5 routes vs Google Flights (verified). 400+ airlines in 5 seconds. Join the community - Star and spread the word
What is LetsFG?
LetsFG is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to agent-native flight search & booking. saved \$116 across 5 routes vs google flights (verified). 400+ airlines in 5 seconds. join the community - star and spread the word
Agent-native flight search & booking. Saved \$116 across 5 routes vs Google Flights (verified). 400+ airlines in 5 seconds. Join the community - Star and spread the word
This server falls under the Business Applications category on MCPgee, the world's largest MCP server directory with 33,000+ servers.
Features
- Agent-native flight search & booking. Saved \\\$116 across 5 r
Use Cases
Maintainer
Works with
Installation
Manual Installation
npx letsfgConfiguration
Configuration Details
claude_desktop_config.json
Performance
Response Metrics
Resource Usage
How to Set Up and Use LetsFG
LetsFG is an agent-native flight search and booking platform that connects AI assistants to 400+ airlines through a single MCP server, enabling end-to-end itinerary discovery, price unlocking, and booking within a conversational AI session. It provides a free search tier with 200+ connectors and an API tier with LETSFG_API_KEY for price unlocking and live PNR creation with e-ticket delivery. Travelers and travel agents use it to find cheaper fares than Google Flights by querying multiple airline feeds simultaneously and booking directly through natural language without leaving their AI client.
Prerequisites
- Node.js and npm installed for the npx MCP server
- A LetsFG account and LETSFG_API_KEY for price unlock and booking (free for search)
- Payment method set up via 'letsfg setup-payment' for booking (card or USDC.e crypto)
- An MCP-compatible client such as Claude Desktop, Cursor, or Windsurf
Install the LetsFG CLI
Install the LetsFG CLI globally to access the flight search commands and manage your account from the terminal.
npm install -g letsfg
# OR for Python SDK:
pip install letsfgRegister for an account and get your API key
Register for a LetsFG account to obtain your LETSFG_API_KEY. The API key is required for price unlock and booking; search is free without a key.
letsfg register
# To recover an existing key:
letsfg recoverSet up a payment method for booking
Attach a payment method to your account before attempting to book flights. LetsFG accepts credit/debit cards and crypto (MPP/USDC.e). This step is required for booking but not for searching.
letsfg setup-paymentConfigure your MCP client
Add the LetsFG MCP server to your Claude Desktop configuration with your API key. The MCP package is 'letsfg-mcp' (different from the CLI package name).
{
"mcpServers": {
"letsfg": {
"command": "npx",
"args": ["-y", "letsfg-mcp"],
"env": {
"LETSFG_API_KEY": "trav_your_api_key"
}
}
}
}Search for flights
Use the CLI or your MCP client to search for flights. LetsFG returns results from 400+ airlines in approximately 5 seconds. Use --mode fast for a 20-40 second deep search.
letsfg search LHR JFK 2026-09-15
# Business class filter:
letsfg search LHR JFK 2026-09-15 --cabin C
# Return trip:
letsfg search LON BCN 2026-09-01 --return 2026-09-08 --sort priceUnlock and book a flight
After finding a suitable offer, unlock the live price (holds the fare for 30 minutes, 1% fee, $3 minimum) and then book with passenger details. An e-ticket will be sent to the provided email.
letsfg unlock off_your_offer_id
letsfg book off_your_offer_id --passenger '{"name":"Alice Smith","dob":"1990-01-01"}' --email [email protected]LetsFG Examples
Client configuration
Claude Desktop configuration for the LetsFG MCP server with API key for booking support.
{
"mcpServers": {
"letsfg": {
"command": "npx",
"args": ["-y", "letsfg-mcp"],
"env": {
"LETSFG_API_KEY": "trav_your_api_key_here"
}
}
}
}Prompts to try
Example prompts for agent-native flight search and booking with LetsFG.
- "Search for the cheapest economy flights from London Heathrow to New York JFK on September 15th"
- "Find round-trip flights from Paris to Barcelona departing October 1st, returning October 8th, sorted by price"
- "What business class options are available from LHR to DXB next Monday?"
- "Unlock the price for offer off_abc123 and tell me how long the hold lasts"
- "Book the cheapest flight you found for passenger John Doe, DOB 1985-03-22, email [email protected]"Troubleshooting LetsFG
Search returns no results or very few airlines
Try using IATA airport codes rather than city names (e.g., LHR instead of London). Run 'letsfg locations <city-name>' to resolve the correct IATA code. For broader results, use '--mode fast' which runs a deeper search across more connectors at the cost of speed.
Price unlock fails with an authentication error
Verify your LETSFG_API_KEY starts with 'trav_' and is set correctly in the MCP server env config. The key must be the one obtained from 'letsfg register' or 'letsfg recover'. Price unlock requires a valid API key — free tier only supports search.
Booking fails after a successful unlock
Unlocked fares are held for 30 minutes. If you exceeded this window, re-search and unlock a new offer. Also confirm your payment method is attached ('letsfg me' shows account status) and that passenger details including date of birth are in the required format.
Frequently Asked Questions about LetsFG
What is LetsFG?
LetsFG is a Model Context Protocol (MCP) server that agent-native flight search & booking. saved \$116 across 5 routes vs google flights (verified). 400+ airlines in 5 seconds. join the community - star and spread the word It connects AI assistants to external tools and data sources through a standardized interface.
How do I install LetsFG?
Follow the installation instructions on the LetsFG GitHub repository. Clone the repo, install dependencies, and add the server config to your AI client.
Which AI clients work with LetsFG?
LetsFG works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.
Is LetsFG free to use?
Yes, LetsFG is open source and available under the NOASSERTION license. You can use it freely in both personal and commercial projects.
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