Airfare Brain
The true cost of a flight: bag, seat, check-in and payment fees on 19 airlines (Ryanair, easyJet, Wizz Air, BA, Delta, United...), each from the airline's own pages with source and date. Free, no key, read-only.
Máy chủ MCP được lưu trữ
npx add-mcp 'https://airfarebrain.com/mcp'Cài vào Claude Code, Codex, Cursor và nhiều công cụ khác
Tài liệu
Airfare Brain MCP server
The true cost of a flight, for AI assistants. Bags, seats, priority boarding, check-in and payment fees on 21 airlines (Ryanair, easyJet, Wizz Air, Jet2, British Airways, Lufthansa, TAP, Delta, United and more), each price taken from the airline's own pages, with the source and the date it was checked.
Free. No API key. No login. Read-only.
MCP endpoint (streamable HTTP):
https://airfarebrain.com/mcp
Listed in the official MCP Registry as com.airfarebrain/airfare-brain.
Website: airfarebrain.com · Fee data: airfarebrain.com/fees ·
For AI: llms.txt
Why it exists
The fare a flight search shows is not what the trip costs. A cabin bag, a checked bag, a seat next to someone you know, checking in at the airport or paying by card can each add more than the fare itself, and the price goes up if you add them later or at the airport. Airfare Brain reads each airline's published fee pages, records every price with its source and date, and answers with the numbers, so an assistant can say what a flight will really cost.
Tools
| Tool | What it answers |
|---|---|
get_capabilities | What is covered, how fees are researched and dated, what it does not do (no live fares, no booking) |
list_airlines | Every airline with a fee table: name, IATA code, the date its fees were checked, its page |
airline_fees | One airline's extras (bags, seats, priority, check-in, changes, payment): price range, when bought (at booking / later / at the airport), source URL, date checked |
true_cost | Fare + the extras the person chooses, for the whole party and each flight, with what it costs if added later or at the airport |
Ranges are shown exactly as the airline publishes them. A fee the airline does not publish is said to be unknown, never counted as free. Figures from a third party (only where the airline publishes none) are labelled "reported".
Example questions
- "I found a Ryanair flight for €39. What will it cost with a cabin bag and a 20kg bag, return?"
- "Is easyJet or Wizz Air cheaper for two people with one checked bag between them?"
- "What does Jet2 charge to choose a seat?"
- "How much more is a bag at the airport than online on Wizz Air?"
- "Does British Airways' Basic fare include a cabin bag?"
Connect
Claude (claude.ai / Claude Desktop)
Settings → Connectors → Add custom connector → URL https://airfarebrain.com/mcp.
Or in claude_desktop_config.json:
{
"mcpServers": {
"airfare-brain": { "url": "https://airfarebrain.com/mcp" }
}
}
ChatGPT
Settings → Apps & Connectors → Advanced → Developer mode → Create → MCP server URL
https://airfarebrain.com/mcp, authentication: none.
Cursor / Windsurf / Cline / VS Code
{
"mcpServers": {
"airfare-brain": { "url": "https://airfarebrain.com/mcp" }
}
}
Stdio-only clients
npx mcp-remote https://airfarebrain.com/mcp
Plain JSON
All fee tables in one file: airfarebrain.com/data/fees.json.
How the numbers are made
Each airline's fee pages are read by hand, every value is stored with the page it came from, a short quote and the date, and each table is re-checked monthly (a table past its re-check date is flagged on the site). Travellers can report what they actually paid; those reports are checked against the tables.
Sister tool
For car hire at the airport you land at: Car Rental Brain
(https://app.carrentalbrain.com/mcp).
Affiliate disclosure
The MCP tools return fee data only, with no booking links. The airfarebrain.com website's flight search links to Kiwi.com through its affiliate programme, and Airfare Brain may earn a small commission at no cost to the person booking.
Privacy
The tools take no personal data and need no account. Privacy policy: airfarebrain.com/privacy.