Car Rental Brain MCP Server

by carrentalbrain Your server? Claim it

answering

Car Rental Brain is answering right now. Last checked 9 min ago. It exposes 7 tools. Last commit 24 Oct 2026.

Real cost of car hire at 120+ airports: second driver, cover, deposits, debit cards, desk hours.

Uptime history 19 days of history · worst day 96%

19 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

243 ms

Response time

average over 24h

Stars

last commit 24 Oct 2026

What changed 13

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 22 October 2026. No other catalogue keeps this.

5 Nov a tool appeared recommend_rental

4 Nov a tool description was rewritten airport_costs

3 Nov a tool description was rewritten build_search_link

24 Oct a tool changed version

22 Oct 6 tool descriptions were rewritten airport_costs, build_search_link, compare_airports and 3 more

22 Oct 2 tools changed the parameters they ask for build_search_link, compare_airports

22 Oct a tool changed version

Car Rental Brain does not always answer

Over the last week it answered 99.4% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 9 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add car-rental-brain --transport http https://app.carrentalbrain.com/mcp

Settings → Connectors → Add custom connector, then paste this address

https://app.carrentalbrain.com/mcp

~/.codex/config.toml

[mcp_servers.car-rental-brain]
url = "https://app.carrentalbrain.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "car-rental-brain": {
      "url": "https://app.carrentalbrain.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "car-rental-brain": {
      "type": "http",
      "url": "https://app.carrentalbrain.com/mcp"
    }
  }
}

Available tools 7

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

airport

airport_costs

The true cost of hiring a car at one airport: per-day price for the car alone, with a second driver, with full cover, automatic, no-deposit (from + typical); by pick-up month; second-driver fees; deposits; debit-card acceptance; desk closing times and out-of-hours fees; policies; Brain's pick per car size (the well-rated supplier that is usually cheapest here, measured - say 'usually'). Use when someone asks what car hire really costs at one airport, or about deposits, fees or desk hours there.

airports

list_airports

Airports we measure, with the typical rental price per day. Filter by country. Use to find an airport id or to list what is covered in a country.

build

build_search_link

A link for the PERSON to open: live prices for their exact dates and needs, ranked by the total they will actually pay, where they can book. Use whenever the person has dates and wants to see or book cars. Works for any place; coverage says whether Car Rental Brain has measured it (not_measured: no figures of ours exist there - say so, quote none).

capabilities

get_capabilities

What Car Rental Brain measures, how fresh it is, and which airports/countries are covered. Use first when unsure whether a place is covered.

compare

compare_airports

Rank airports by real cost (car only / with driver / with cover), typical deposit, debit-card friendliness or late desk hours. Use for 'where in Spain is car hire cheapest in March?' or 'which airport is best for a debit card?'

recommend

recommend_rental

ONE call for a car-hire question at one airport: the usual total for the person's dates split into rental, second-driver fee, cover and out-of-hours fee (deposit shown separately as a card hold), the suppliers that usually suit their needs with each requirement marked meets / unverified, and the correctly dated search link to book. Measured history, not live offers. Use first when the person gives dates or needs (debit card, deposit limit, second driver, late arrival).

supplier

supplier_terms

Per supplier at an airport: typical price per day, second-driver fee, full-cover price, deposit held, whether the desk takes a debit card, and customers' desk review scores. Use when the person is choosing between suppliers at one airport or asks about a named supplier.

Endpoints

URL	Transport	State	Latency	Checked
https://app.carrentalbrain.com/mcp	streamable-http	answering	175 ms	9 min ago

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Car Rental Brain — questions

Answers built from our own checks of this server.

What can Car Rental Brain do?

It exposes 7 tools, read directly from the server on our last check. Among them: airport_costs, build_search_link, compare_airports, get_capabilities, list_airports, recommend_rental and 1 more. 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 Car Rental Brain working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 243 ms. The bar chart above shows every period we have measured.

How do I connect Car Rental 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 Car Rental Brain need an API key?

No. Car Rental Brain completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 7 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Car Rental Brain?

It answers our handshake in 243 ms on average, which is faster than 59% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Car Rental 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 app.carrentalbrain.com, which runs on its operator's own terms.