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Airfare Brain MCP Server

by airfarebrain Your server? Claim it
answering

Airfare Brain is answering right now. Last checked 3 min ago. It exposes 5 tools. Last commit 6 Nov 2026.

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

Uptime history 22 days of history · worst day 99%
22 days agonow
100.0%
Uptime 24h
92 of 92 checks
5
Tools
read from the server
210 ms
Response time
average over 24h
0
Stars
last commit 6 Nov 2026

What changed 13

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 21 October 2026. No other catalogue keeps this.

29 Oct 3 tools changed the parameters they ask for7 times that day airline_fees, trip_at_airport, true_cost
29 Oct a tool changed version
27 Oct 2 tool descriptions were rewritten get_capabilities, trip_at_airport
26 Oct a tool changed version
24 Oct a tool appeared trip_at_airport
21 Oct a tool changed the parameters it asks for true_cost
and 4 more, back to 21 October 2026

Nothing serious here today

Today is the operative word: we check Airfare Brain every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 3 min ago.

run in your terminal
claude mcp add airfare-brain --transport http https://airfarebrain.com/mcp
Settings → Connectors → Add custom connector, then paste this address
https://airfarebrain.com/mcp
~/.codex/config.toml
[mcp_servers.airfare-brain]
url = "https://airfarebrain.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "airfare-brain": {
      "url": "https://airfarebrain.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "airfare-brain": {
      "type": "http",
      "url": "https://airfarebrain.com/mcp"
    }
  }
}

Available tools 5

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

airline
airline_fees
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.
airlines
list_airlines
List every airline with a fee table: name, IATA code, the date its fees were checked, and its page.
capabilities
get_capabilities
What Airfare Brain covers: airlines, how fees are researched and dated, what it does NOT do (no live fares, no booking), and what car hire at the destination airport typically costs.
trip
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?'. Car only: deposits, second-driver fees and desk cover are not included; the answer links to the airport's full car-hire report.
true
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.

Endpoints

URLTransportStateLatencyChecked
https://airfarebrain.com/mcp streamable-http answering 138 ms 3 min ago

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Airfare Brain — questions

Answers built from our own checks of this server.

What can Airfare Brain do?
It exposes 5 tools, read directly from the server on our last check. Among them: airline_fees, get_capabilities, list_airlines, trip_at_airport, true_cost. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is Airfare Brain working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 210 ms. The bar chart above shows every period we have measured.
How do I connect Airfare Brain?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Airfare Brain need an API key?
No. Airfare Brain completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 5 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Airfare Brain?
It answers our handshake in 210 ms on average, which is faster than 64% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is Airfare Brain open source?
The code is open source: it is published under the Apache-2.0 licence and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at airfarebrain.com, which runs on its operator's own terms.