Variflight MCP: flights, weather and fares in an agent
Variflight MCP Server
Variflight's official MCP server: an agent searches flights by route and number, connections, fares, aircraft position, weather
- 34 ★ on the repository
- Last commit
Extended access
Why this level
- Every call spends the paid Variflight balance and paged reading multiplies the cost
- The API key is tied to a paid account and a leak would bring someone else's charges
Install
- Works in
Manual install
claude mcp add --transport http variflight-aviation https://ai.variflight.com/servers/aviation/mcp --header "X-API-Key: YOUR_API_KEY"The command from the README for the remote server, with a key from the Variflight console.
Access and checks
How we reviewExtended accessThe tool runs code or makes network calls and only reads external data.
- Every call spends the paid Variflight balance and paged reading multiplies the cost
- The API key is tied to a paid account and a leak would bring someone else's charges
This is third-party code. Review the repository files before installing.
What it does
The server connects an agent to the Variflight AI Open Platform, a flight data service. Eight tools cover searching direct flights by city or airport on a date, looking up a flight by number, connecting options and a summary with the cheapest and fastest route. A separate tool returns cabin-level fares between two cities. Three more tools serve as references: a flight comfort index with punctuality, aircraft type, cabin layout and meals, real-time aircraft position by tail number, and a three-day airport weather forecast. Flight and connection search take limit, offset and detail parameters that trim the response on busy routes. The server runs locally through npx, and there is a remote version at https://ai.variflight.com/servers/aviation/mcp with a key in a header or OAuth 2.1 sign-in.
Who it is for. Developers of travel and logistics services, and anyone planning trips who wants to ask an agent about flights, connections and airport weather.
Good fit when
- You need to compare direct Beijing to Shanghai flights on a date and see fares by cabin
- You want to check how punctual flight MU2157 is and which aircraft it uses
- A passenger support service needs to track an aircraft's position by tail number
- Before a trip it is worth checking the departure airport's three-day weather forecast
- For a route with no direct flight you need connecting options through different cities
Not a fit when
- You need booking or ticket purchase: the server only returns reference data on flights and fares
- The project cannot spend money on a paid API: a new account gets 50 yuan of trial credit, then billing by tariff
- You need historical data for past years: the tools are built for current and future dates
- You need a flight search without IATA city and airport codes: the input expects them
Example request
Find direct flights from Beijing to Shanghai on March 20, show fares by cabin and tell me which flight is more often on time.MCP
- Transport
- stdio, http
- Authentication
- API key
Environment variables
VARIFLIGHT_API_KEYrequired, secret- API key from the Variflight console
Limitations
You need an API key from the Variflight console, and a new account gets a trial balance of 50 yuan. Each page of paged results is billed as a separate call, and busy routes return dozens of results with many fields, so limit and detail=summary help.
City and airport codes cannot be mixed for the same side of a route. Documentation and pricing live on the Variflight platform, some pages are in Chinese, and the data coverage is oriented to the Chinese market.
How to disable. Remove the server with `claude mcp remove variflight`. Revoke the API key in the Variflight console and delete the VARIFLIGHT_API_KEY variable from the client config.
FAQ
How do I connect Variflight MCP to Claude Code?
With claude mcp add --transport http variflight-aviation https://ai.variflight.com/servers/aviation/mcp and the X-API-Key header with your key. A client with OAuth 2.1 support connects to the same address without a key and asks you to sign in.
How much does the server cost?
The server itself is free and open, and you pay for Variflight API calls under the platform tariff. A new account gets 50 yuan of trial credit, and current prices are on ai.variflight.com.
Which tools does the server have?
Eight: flight search by route and by number, connecting options, a flight comfort index, aircraft position, airport weather, an itinerary summary and fares by city. The full reference is in the docs at ai.variflight.com/docs/aviation.
How do I shrink the response on a busy route?
Pass limit, offset and detail=summary to flight or connection search. The response returns the total and next_offset for the next page, but each page is billed as a separate call.
Is there a remote server with no install?
Yes, the address https://ai.variflight.com/servers/aviation/mcp works over streamable HTTP. The key goes in the X-API-Key header, and a client with OAuth 2.1 signs in without a key. The local option runs from the @variflight-ai/variflight-mcp package.
Discussion
No questions or reviews yet.
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README in short
The README briefly describes the Variflight AI Open Platform, getting a key and the remote server address, then gives JSON for a local npx install. Eight tools follow one by one with call examples, the paging parameters and the ISC license.