Airfare Brain

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True cost of flight extras (bags, seats, fees) on 29 airlines in Europe and North America, sourced.

Maps & Travel

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https://airfarebrain.com/mcp

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Tool list from our last check. Connect live to refresh it.

airline_fees Read-only

One airline's published extra fees (bags, seats, priority, check-in, changes, payment), each with the price range, when bought (at booking / later / airport), how it is charged, its source URL and the date checked. Optionally filter by category.

airlinestring, required

Name or IATA code, e.g. 'Ryanair', 'FR', 'easyJet', 'W6'

categorystring

currencystring

Tools (5)

Tool list last changed Oct 25, 2026.

airline_fees

read-only

Argument	Type	Description
airline*	string	Name or IATA code, e.g. 'Ryanair', 'FR', 'easyJet', 'W6'
category	string
currency	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "airline"
  ],
  "properties": {
    "airline": {
      "type": "string",
      "description": "Name or IATA code, e.g. 'Ryanair', 'FR', 'easyJet', 'W6'"
    },
    "category": {
      "enum": [
        "cabin_bag",
        "checked_bag",
        "seat",
        "priority",
        "airport_checkin",
        "boarding_pass",
        "payment",
        "name_change",
        "flight_change",
        "other"
      ],
      "type": "string"
    },
    "currency": {
      "enum": [
        "EUR",
        "GBP"
      ],
      "type": "string"
    }
  },
  "additionalProperties": false
}

get_capabilities

What Airfare Brain covers: airlines, how fees are researched and dated, what it does NOT do (no live fares, no booking), and the sister tool for car hire.

read-only

No arguments.

Input schema (JSON)

{
  "type": "object",
  "properties": {},
  "additionalProperties": false
}

list_airlines

List every airline with a fee table: name, IATA code, the date its fees were checked, and its page.

read-only

No arguments.

Input schema (JSON)

{
  "type": "object",
  "properties": {},
  "additionalProperties": false
}

trip_at_airport

The whole trip into one airport in one answer: the flight's extras on an airline (bags, seats, fees, as true_cost) AND what car hire there really costs (Car Rental Brain's measured median per day, car only, dated). Use for 'flying to Faro with Ryanair, bags and a hire car: what will it cost?'. For deposits, second-driver fees and desk cover, follow up with Car Rental Brain's airport_costs (its MCP is linked in the answer).

read-only

Argument	Type	Description
fare	number	Total fare for the whole party, if known
seat	string
trip	string
airline	string	Airline name or IATA code (optional; without it you get car hire only)
airport*	string	IATA code or name of the airport you fly INTO, e.g. 'FAO', 'Faro', 'Malaga'
infants	integer
car_days	integer	Days of car hire (default 7)
currency	string
priority

true_cost

The true cost of a flight on one airline. Pass `fare` (the total for the whole party, from a flight-search tool or the person) to get fare + extras; without it you get the extras alone. Extras = what the person chooses (cabin bag, checked bag by kg, seat, priority, infants) for their party and trip, as the range the airline publishes. Also lists what costs more if left until the airport, unchosen fees that may apply (admin, card %), and extras the airline does not publish a price for.

read-only

Argument	Type	Description
fare	number	Total fare already found for the whole party, if known
seat	string	extra = legroom / front
trip	string
airline*	string	Name or IATA code
infants	integer	Under-2s on a lap
currency	string
priority	boolean
cabin_bag	boolean	A large cabin bag for the overhead locker
hold_bags