Use our car data in AI assistants

Connect it

In any assistant that supports custom connectors (remote MCP servers), add a connector with this URL:

https://carcomparison.co.uk/mcp

It uses the Model Context Protocol over HTTP and needs no authentication. Developers can call it directly: POST JSON-RPC requests (initialize, tools/list, tools/call) to the same URL.

What it can answer

• Car reliability from MOT data car_reliability

  How reliable a UK car model is, from DVSA MOT test results adjusted for age and mileage: a reliability score (100 = average), its rating, MOT failure rate, rank overall and in its class, and the most common MOT failures. Use for questions like 'Is the Ford Focus reliable?'.

  Try: “Is the Nissan Qashqai reliable?”

• Most (or least) reliable cars most_reliable_cars

  The most reliable used cars in the UK from MOT data, overall or within a class (e.g. small SUVs, superminis), best first. Set least to true for the least reliable.

  Try: “Which small SUVs have the best MOT record?”

• Car specs and prices car_specs

  Key facts for the current generation of a UK car model: price range, boot space, size, seats, power, 0-62mph and Euro NCAP rating, from manufacturer and official sources.

  Try: “How big is the boot on a Skoda Octavia?”

• ULEZ and clean air zone check clean_air_zone_check

  Whether a car is likely to meet London ULEZ and UK clean air / low emission zone standards (petrol Euro 4, diesel Euro 6), from its fuel and first registration date or Euro standard, and what each zone charges a non-compliant private car.

  Try: “Will my 2014 diesel pay the ULEZ?”

• UK car tax (VED) car_tax

  Annual UK car tax (Vehicle Excise Duty) for a car at 2026/27 rates, from its first registration date, fuel, CO2 emissions, list price and engine size. Includes the first-year rate for new cars and the expensive car supplement.

  Try: “How much is car tax on a 2019 petrol with 128g/km CO2 and a £28,000 list price?”

• Company car tax (BIK) company_car_tax

  UK company car benefit-in-kind tax: the appropriate percentage, taxable benefit and yearly tax for a company car, for any tax year from 2025/26 to 2030/31, from its list price, CO2 and electric range.

  Try: “What's the company car tax on a £45,000 electric car for a higher-rate taxpayer?”

Using the answers

Every answer links to the page it comes from. The MOT data is DVSA's, under the Open Government Licence; see data sources and how the reliability score works. Tax answers use the rates on our calculators, which we check against GOV.UK and update after each Budget.