Variflight MCP Server

April 20, 2026 · View on GitHub

A Model Context Protocol (MCP) server implementation for VariFlight flight information services. This server provides various tools to query flight information, weather data, and flight comfort metrics.

Variflight API Key

To use the Variflight MCP server, you need to have a Variflight API key. You can get it from here.

Installation

{
    "mcpServers": {
        "variflight": {
            "command": "npx",
            "args": [
                "-y",
                "@variflight-ai/variflight-mcp"
            ],
            "env": {
                "VARIFLIGHT_API_KEY": "your_api_key_here"
            }
        }
    }
}

Available Tools

1. Search Flights by Departure and Arrival

Search direct flights by city or airport code on a specific date. Use city codes like BJS or exact airport codes like PEK, but do not mix city and airport codes for the same side:

searchFlightsByDepArr({
  dep: "PEK",  // Beijing
  arr: "SHA",  // Shanghai
  date: "2024-03-20"
})

2. Search Flights by Number

Search a specific flight by flight number and date:

searchFlightsByNumber({
  fnum: "MU2157",
  date: "2024-03-20"
})

3. Get Flight Transfer Information

Search connecting flight options between departure and arrival cities:

getFlightTransferInfo({
  depcity: "BJS",
  arrcity: "LAX",
  depdate: "2024-03-20"
})

4. Flight Happiness Index

Get comfort-focused details for a known flight, such as punctuality, aircraft type, cabin configuration, meals, and entertainment:

flightHappinessIndex({
  fnum: "MU2157",
  date: "2024-03-20"
})

5. Real-time Aircraft Location

Track realtime flight location using the aircraft registration number, also called tail number:

getRealtimeLocationByAnum({
  anum: "B2021"
})

6. Airport Weather Forecast

Get the 3-day airport weather forecast:

getFutureWeatherByAirport({
  airport: "PEK"
})

7. Search Flight Itineraries

Get a natural-language summary with recommended flight options, overall lowest price, shortest duration, and several suggested itineraries:

searchFlightItineraries({
  depCityCode: "BJS",  // Beijing
  arrCityCode: "SHA",  // Shanghai
  depDate: "2025-04-20"
})

8. Get Flight Prices by Cities

Get structured raw sale-flight data between two cities, with each flight returning cabin-level prices:

getFlightPriceByCities({
  dep_city: "BJS",  // Beijing
  arr_city: "SHA",  // Shanghai
  dep_date: "2026-04-20"
})