LetsFG MCP Server: Search and Book Flights and Hotels

• Searches live flight prices across hundreds of airlines

  Looks up live fares for a route and date, one way or return. It waits for late results and flags split tickets, where two separate tickets mean the second airline owes you nothing if you miss the connection.

  Try: “Find the cheapest flight from London to Barcelona on June 15.”

  Network · search_flights

• Turns a city or airport name into airport codes

  Converts a place name such as London into the airport codes the flight search needs. It needs a Developer API key; with the normal token you pass codes like LON or JFK yourself.

  Try: “What are the airport codes for London?”

  Network · resolve_location

• Books a flight from a search result

  Holds the fare on your saved card and starts a booking agent that buys the ticket. The hold is captured only once an airline booking reference exists, and a failed booking releases it.

  Try: “Book the 9:40 offer for me and my partner. Our details are in the next message.”

  Write · book_flight

• Checks how a flight booking is going

  Polls a booking started by the booking tool. A booking takes about 4 to 11 minutes and ends as completed or failed, and the result tells you whether your card was charged.

  Try: “Is my Barcelona booking done yet?”

  Network · get_flight_booking

• Answers a question a paused booking is waiting on

  Replies when a booking stops at a seat map, a paid extra or a changed fare. Nothing moves until you answer, and the held cart expires, so the assistant should ask you first.

  Try: “Pick seat 12A for the booking that is waiting.”

  Write · answer_booking_question

• Finds the city ID that hotel search needs

  Turns a place name into the supplier city ID and name that the hotel search requires.

  Try: “Look up Warsaw for a hotel search.”

  Network · resolve_hotel_city

• Searches bookable hotel rooms and rates

  Returns real hotel offers for a city and dates, refundable and not, with the free-cancellation deadline on each. It needs a connected payment method even to search, because a search opens a session at the supplier.

  Try: “Find hotels in Warsaw from July 3 to July 6 for two adults.”

  Network · search_hotels

• Books a hotel room

  Holds the full price on your payment method, then books and pays the supplier. The hold is captured only after the hotel confirms, and a failed booking releases it. It returns a job ID, not the booking itself.

  Try: “Book the refundable double room at the first hotel for Anna Kowalska and Jan Kowalski.”

  Write · book_hotel

• Checks the result of a hotel booking

  Collects the outcome of a hotel booking started earlier, with confirmation, room, total price and cancellation terms once it succeeds.

  Try: “Did my hotel booking go through?”

  Network · get_hotel_booking

• Cancels a hotel booking and refunds you

  Cancels a hotel booking made through this account. A free cancellation is refunded in full, and one that would cost money is refused. It can take over a minute.

  Try: “Cancel my Warsaw hotel booking.”

  Delete · cancel_hotel_booking

• Explains how to connect your account

  Returns the current sign-in steps and the link to add a card. A person has to approve the connection in a browser once, and the assistant must not ask for card numbers.

  Try: “How do I connect LetsFG so you can book?”

  Network · authenticate

• Creates a link to add a card to a Developer API account

  For the separate paid Developer API only. It returns a one-time link where a person saves a card, and it refuses to run without a Developer API key.

  Try: “Give me the link to add a payment method to my API account.”

  Write · connect_payment

• Shows Developer API balance and usage

  For the paid Developer API only. Returns the account profile, balance and usage, and needs a Developer API key.

  Try: “Show my LetsFG API balance.”

  Network · get_agent_profile

• Loads the LetsFG how-to guide into the chat

  Returns the workflow guide covering sign-in, search, booking, pricing and passenger rules, for clients that do not read MCP resources on their own.

  Try: “Load the LetsFG guide before we start.”

  Read · load_resources

Watch out for

• It can buy flights and hotels with your card

  book_flight and book_hotel hold the price on your saved card and complete the purchase once the seller confirms. Check the offer, the total and the refund terms before you tell the assistant to book. github.com

• Split tickets give no protection if you miss a connection

  Some flight offers are two separate tickets. If the first flight is late, the second airline owes you nothing. Ask the assistant to say when an offer is a split ticket. npmjs.com

• It can cancel a hotel booking

  cancel_hotel_booking cancels a booking made through your account. The server refuses a cancellation that would cost money, but it still ends the reservation, so confirm before you ask. npmjs.com

• Passport details go to LetsFG

  Booking sends names, birth dates, email and phone to letsfg.co, which passes them to the airline or hotel. Share only what the assistant needs. npmjs.com

• Developer API tools are a separate paid product

  connect_payment and get_agent_profile only work with a paid Developer API key. Most people do not need that key. npmjs.com

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