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Flightcat MCP server

Which MCP servers are Flightcat's own, from the official registry and from asking its own domain, 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 nameio.flightcat/flightcatverified in the MCP registry

The registry name sits under flightcat.io. 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
  • Tools1
  • Server calls itselfflightcat-flight-search
  • Server version1.1.0
  • Protocol version2025-06-18

On 2026-10-20 the server answered initialize and tools/list without a sign-in. First answer in 382 ms.

Should an agent connect itNot proven either way yet
  • Whether its tools do the product's job has not been judged yet.

Once connected

  • Parameters are untyped or undescribed in 1 of 1 tools: check arguments before calling.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 16, the first on 2026-10-20
  • INITE MCP score95 of 100answers 100 · definitions 83 · context 100 · connects 100
  • Answered100% of days16 of 16 daily checks
  • Median first answer357 ms
  • Space in an agent's context≈ 859 tokensthe definitions of all its tools (1), which an agent carries on every turn
  • Tool definitionsB · 83 of 100
  • Typed results1 of 1 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 1 of 1

What an agent can do with it

  • not sure · search one-way economy flights by describing the trip
  • not sure · find cheap flights from a chosen origin to anywhere

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

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 score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers1 tools · read 2026-10-20
  • search_flights

    Search live public airfare, including requests with vague or broad location names and flexible dates. Resolves locations and dates, then returns and displays up to 10 itineraries in an interactive comparison with prices, schedules, stops…

How to connect

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

{
  "mcpServers": {
    "flightcat": {
      "type": "http",
      "url": "https://mcp.flightcat.io/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http flightcat https://mcp.flightcat.io/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://mcp.flightcat.io/mcp as a custom connector in the settings.

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.