Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@Car Rental Brain What will a week at Faro in November really cost with two drivers?"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
The real cost of car hire, for AI assistants. Second-driver fees, deposits, debit-card acceptance, desk hours and what excess cover really costs, measured at 120+ airports in Europe, the UK and the US, plus a link to live prices ranked by the total a person will actually pay.
Free. No API key. No login. Read-only.
MCP endpoint (streamable HTTP):
https://app.carrentalbrain.com/mcpListed in the official MCP Registry as com.carrentalbrain/car-rental-brain.
Website: carrentalbrain.com · Agent page: carrentalbrain.com/ai
Car-hire search shows the headline price. The bill at the desk is different: a second driver adds a fee, the desk blocks a deposit on the card, many desks refuse debit cards, some close before a late flight lands, and the desk sells its own excess cover. Car Rental Brain measures these from its own repeated searches and answers with the numbers, so an assistant can say what a rental will really cost - not just what it is advertised at.
Related MCP server: FlightQueue
Tool | What it answers |
| What is measured, how fresh it is, which airports and countries are covered |
| Airports measured, with the typical price per day; filter by country |
| One airport's real cost: car only, with a second driver, with full cover, automatic, no-deposit; by pick-up month; deposits; debit cards; desk hours and out-of-hours fees |
| Rank airports by real cost, deposit, debit-card friendliness or late desk hours |
| Per supplier at an airport: price, second-driver fee, full-cover price, deposit, debit card, desk review scores |
| A link for the person: live prices for their exact dates and needs, ranked by the total they will pay, where they can book |
Every answer is dated and comes from measured searches, never estimates presented as fact.
"What does it really cost to hire a car at Faro Airport for a week in November with two drivers?"
"Which Spanish airport is cheapest for car hire in March?"
"I only have a debit card - where can I pick up a car in Portugal?"
"My flight lands at 23:30 in Malaga - which desks are still open?"
"Is the desk's excess cover cheaper than buying full coverage in advance at Lisbon?"
Settings → Connectors → Add custom connector → URL https://app.carrentalbrain.com/mcp.
Or in claude_desktop_config.json:
{
"mcpServers": {
"car-rental-brain": { "url": "https://app.carrentalbrain.com/mcp" }
}
}Settings → Apps & Connectors → Advanced → Developer mode → Create → MCP server URL
https://app.carrentalbrain.com/mcp, authentication: none.
As a plugin (from this repository):
/plugin marketplace add jimiwalters-cmyk/car-rental-brain-mcp
/plugin install car-rental-brain@car-rental-brainOr add the server directly:
claude mcp add --transport http car-rental-brain https://app.carrentalbrain.com/mcp{
"mcpServers": {
"car-rental-brain": { "url": "https://app.carrentalbrain.com/mcp" }
}
}npx mcp-remote https://app.carrentalbrain.com/mcpThe same tools are available as a plain JSON API (e.g. https://app.carrentalbrain.com/api/v1/get_capabilities) - see
carrentalbrain.com/ai.
Each airport is searched repeatedly across trip lengths and pick-up months; a report is published only once enough searches agree. Second-driver fees are the suppliers' own quoted fees (a fee nobody publishes is never counted as free). Desk excess-cover prices come only from each supplier's own published price list, with the source and the date read. Full method: carrentalbrain.com/methodology.
Car Rental Brain is free. Booking happens on DiscoverCars through the link the tools return, and Car Rental Brain earns a commission on bookings, at no extra cost to the person booking. Results are ranked by the total the person will pay, never by commission.
The tools take no personal data and need no account. Searches are logged without names or contact details. Privacy policy: carrentalbrain.com/privacy.
The files in this repository are licensed under the Apache License 2.0; see NOTICE. The Car Rental Brain name and logo are not covered by this licence and remain the property of Jimi Walters. The server, its code and its data are not in this repository; use of the server is governed by the terms.
This server cannot be deployed
Get date-specific quotes and book private UK airport and cruise-port transfers through your AI assistant. Compare vehicle options, validate flights, retrieve bookings, amend details and cancel with customer confirmation. No registration required to start, subject to service limits; optional API-key and OAuth access for registered integrations. Transfer fares are payable separately and cancellation conditions apply. Live demo and connection instructions: https://ai.airport-pickups-london.com/ Technical documentation: https://mcp.airport-pickups-london.com/docs
Real availability, prices and bookings of car rental companies (rent-a-car), by conversation.
Live flight prices and working booking links for AI agents and travel apps.
Give AI assistants access to real-time data. Search the web, compare flights, find hotels, and more.
