a2bflight MCP server

Which servers in the official MCP registry are a2bflight's own, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-20

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Whose server it is

Registry namecom.a2bflight/faresverified in the MCP registry

The registry name sits under a2bflight.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-20

Stateanswerschecked 2026-10-20
Tools3
Server calls itselfa2bflight
Server version1
Protocol version2025-06-18

On 2026-10-20 the server answered initialize and tools/list without a sign-in. First answer in 154 ms.

Measured dailydaily checks: 1, the first on 2026-10-20

Answeredmeasuring1 of the 7 daily checks it takes to print a share
Median first answer126 ms
Space in an agent's context≈ 559 tokensthe definitions of all its tools (3), which an agent carries on every turn
Tool definitionsA · 100 of 100

Every tool passes all six checks.

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The state of vendors' MCP servers: method and numbers →

Tools it offers3 tools · read 2026-10-20

cheapest_routes
The cheapest cached fare on every route we hold from an origin (or into a destination), cheapest one-way first, each with its cheapest round trip of a 3 to 21 day stay in `return` when we hold one. Filter by a maximum price and a…
find_airports
Look up airports and city codes by name, or list the airports near a code or a lat,lon point. Use it to turn a city name into the IATA code the other tools take.
route_fares
Everything we hold for one airport pair: the cheapest one-way, the cheapest round trip of a 3 to 21 day stay, the cheapest one-way by departure date and by month, and the cheapest round trips. If we hold nothing yet, it starts pricing the…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "fares": {
      "type": "http",
      "url": "https://mcp.a2bflight.com/mcp"
    }
  }
}

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.