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a2bflight fares

by a2bflight.com · remote · no sign-in to list tools · v1.0.0 · published by com.a2bflight

Cached flight fares on thousands of routes, each with the day it was seen. Not live prices. No key.

Final · 2
CompareRegistry entry

3 tools: 2 do something that can't be undone and 1 only read.

Scanned Oct 21, 2026

2 checks matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http fares https://mcp.a2bflight.com/mcp

Findings

Matches of fixed checks, with the text they matched.

2 warn
  • Warncheapest_routes

    The server marks "cheapest_routes" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"openWorldHint":false}; The input addresses people (input.to): what it sends cannot be taken back.

    What this check looks for
  • Warnroute_fares

    The server marks "route_fares" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"openWorldHint":true}; The input addresses people (input.to): what it sends cannot be taken back.

    What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

3 tools

Can't be undone 2Claude Code: ask
  • cheapest_routesThe 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` …1 finding

    Why it is in this group

    • The input addresses people (input.to): what it sends cannot be taken back.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "cheapest_routes" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"openWorldHint":false}; The input addresses people (input.to): what it sends cannot be taken back.

      What this check looks for
    Description, as the server wrote it
    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 departure month here rather than by reading the list; both apply to the one-way. Prices are one adult, economy, as last seen on the date in `checked` — observations, not quotes.

    Annotations the server declares

    • destructiveHint: false
    • openWorldHint: false
    • readOnlyHint: true
    • title: Cheapest routes
  • route_faresEverything 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 …1 finding

    Why it is in this group

    • The input addresses people (input.to): what it sends cannot be taken back.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "route_fares" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"openWorldHint":true}; The input addresses people (input.to): what it sends cannot be taken back.

      What this check looks for
    Description, as the server wrote it
    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 route and says so; ask again a minute later.

    Annotations the server declares

    • destructiveHint: false
    • openWorldHint: true
    • readOnlyHint: true
    • title: Route fares
Only reads 1Claude Code: allow
  • find_airportsLook up airports and city codes by name, or list the airports near a code or a lat,lon point.No findings

    Why it is in this group

    • The name "find_airports" says "find": a word for reading.
    Description, as the server wrote it
    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.

    Annotations the server declares

    • destructiveHint: false
    • openWorldHint: false
    • readOnlyHint: true
    • title: Find airports

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http fares https://mcp.a2bflight.com/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__fares__find_airports"
    ],
    "ask": [
      "mcp__fares__cheapest_routes",
      "mcp__fares__route_fares"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as fares. Review it before you use it.