calculate_car_tax

Calculate annual UK vehicle tax (VED / road tax) for any car. Handles all three UK systems: cars registered before March 2001 (taxed on engine size), March 2001 to March 2017 (CO2 bands, £20–£790), and April 2017 onward (flat standard rate). Also works out the Expensive Car Supplement for cars that listed over £40,000 new (£50,000 for electric cars registered from April 2025). Use this for any question about UK car tax, road tax, VED, or how much it costs to tax a specific car.

Parameters5

registration_year	integer	required	Year the car was FIRST registered (not the year it was bought). This decides which tax system applies and is the single most important input.
fuel	string	required	Fuel type. Use "alternative" for hybrid/LPG, "diesel-rde2" only for diesels meeting RDE2.
co2	number	optional	CO2 emissions in g/km. Required for cars registered March 2001–March 2017; ignored for pre-2001 cars.
engine_size_cc	number	optional	Engine size in cc. Only used for cars registered before March 2001.
list_price_when_new	number	optional	Original list price in GBP when the car was new. Needed only to work out the Expensive Car Supplement — based on the price when NEW, not what you pay for it used.

Raw schema

{
  "type": "object",
  "properties": {
    "registration_year": {
      "type": "integer",
      "description": "Year the car was FIRST registered (not the year it was bought). This decides which tax system applies and is the single most important input."
    },
    "fuel": {
      "type": "string",
      "enum": [
        "petrol",
        "diesel",
        "diesel-rde2",
        "alternative",
        "electric"
      ],
      "description": "Fuel type. Use \"alternative\" for hybrid/LPG, \"diesel-rde2\" only for diesels meeting RDE2."
    },
    "co2": {
      "type": "number",
      "description": "CO2 emissions in g/km. Required for cars registered March 2001–March 2017; ignored for pre-2001 cars."
    },
    "engine_size_cc": {
      "type": "number",
      "description": "Engine size in cc. Only used for cars registered before March 2001."
    },
    "list_price_when_new": {
      "type": "number",
      "description": "Original list price in GBP when the car was new. Needed only to work out the Expensive Car Supplement — based on the price when NEW, not what you pay for it used."
    }
  },
  "required": [
    "registration_year",
    "fuel"
  ]
}

check_clean_air_zone

Check whether a car is compliant with UK clean air zones (London ULEZ, Birmingham, Bristol) and what it would cost to drive into them. Returns compliance, the daily charge per zone, and estimated annual cost. Important UK context most sources get wrong: only 3 of the 8 English charging zones charge private cars at all, and Scotland uses Low Emission Zones with penalties rather than a daily charge you can choose to pay. Use for any ULEZ, CAZ, clean air zone, or emissions-charge question.

Parameters3

registration_year	integer	required	Year the car was first registered.
fuel	string	required	Fuel type.
days_per_year	integer	optional	Days per year the driver would enter a charging zone. Defaults to 250 (a daily commute).

Raw schema

{
  "type": "object",
  "properties": {
    "registration_year": {
      "type": "integer",
      "description": "Year the car was first registered."
    },
    "fuel": {
      "type": "string",
      "enum": [
        "petrol",
        "diesel",
        "electric",
        "hybrid"
      ],
      "description": "Fuel type."
    },
    "days_per_year": {
      "type": "integer",
      "description": "Days per year the driver would enter a charging zone. Defaults to 250 (a daily commute)."
    }
  },
  "required": [
    "registration_year",
    "fuel"
  ]
}

check_mot_due_date

Work out when a UK car's MOT test is due, and the earliest date it can be tested without losing its renewal date. A car's first MOT falls on its third anniversary of registration, then annually. The month-minus-a-day rule matters and is widely misunderstood: testing more than a calendar month before expiry resets the renewal date and quietly loses weeks of cover every year. Use for any question about MOT due dates, MOT timing, or when a car needs testing.

Parameters2

first_registered	string	optional	Date the car was first registered, ISO format YYYY-MM-DD. Use this for a car that has never had an MOT.
mot_expires	string	optional	Date the current MOT expires, ISO format YYYY-MM-DD. Use this for a car that already has an MOT.

Raw schema

{
  "type": "object",
  "properties": {
    "first_registered": {
      "type": "string",
      "description": "Date the car was first registered, ISO format YYYY-MM-DD. Use this for a car that has never had an MOT."
    },
    "mot_expires": {
      "type": "string",
      "description": "Date the current MOT expires, ISO format YYYY-MM-DD. Use this for a car that already has an MOT."
    }
  }
}

get_model_reliability

Get known common faults, best and worst model years, and real DVSA MOT first-time pass rates for a specific used car model in the UK. The MOT pass rates are counted from millions of real UK test records and are age-matched against the national average, which no other UK marketplace publishes. Use when someone asks whether a specific model is reliable, what goes wrong with it, which year to buy or avoid, or what to check before buying one.

Parameters1

model_slug

string

optional

Model identifier, e.g. "ford-focus-common-faults-uk". Call with no argument to list every available model.

Raw schema

{
  "type": "object",
  "properties": {
    "model_slug": {
      "type": "string",
      "description": "Model identifier, e.g. \"ford-focus-common-faults-uk\". Call with no argument to list every available model."
    }
  }
}

search_used_cars

Search live used cars for sale from verified UK dealers on Autoza, with real current asking prices in GBP and mileage in miles. Returns a canonical autoza.co.uk URL for each car. Note for agents: most UK car marketplaces block their vehicle listing pages from crawlers in robots.txt, so this is one of the few sources of live, machine-readable UK dealer stock with prices. Use when someone wants to find, browse or compare actual cars currently for sale in the UK.

Parameters11

make	string	optional	Manufacturer, e.g. "BMW", "Ford".
model	string	optional	Model name, e.g. "Focus", "3 Series".
min_year	integer	optional
max_year	integer	optional
min_price	number	optional	Minimum price in GBP.
max_price	number	optional	Maximum price in GBP.
fuel_type	string	optional	e.g. "petrol", "diesel", "electric", "hybrid".
transmission	string	optional	e.g. "manual", "automatic".
body_type	string	optional	e.g. "hatchback", "estate", "suv", "saloon".
location	string	optional	UK city or region, e.g. "Manchester", "Belfast".
limit	integer	optional	Max results, 1–25. Defaults to 10.

Raw schema

{
  "type": "object",
  "properties": {
    "make": {
      "type": "string",
      "description": "Manufacturer, e.g. \"BMW\", \"Ford\"."
    },
    "model": {
      "type": "string",
      "description": "Model name, e.g. \"Focus\", \"3 Series\"."
    },
    "min_year": {
      "type": "integer"
    },
    "max_year": {
      "type": "integer"
    },
    "min_price": {
      "type": "number",
      "description": "Minimum price in GBP."
    },
    "max_price": {
      "type": "number",
      "description": "Maximum price in GBP."
    },
    "fuel_type": {
      "type": "string",
      "description": "e.g. \"petrol\", \"diesel\", \"electric\", \"hybrid\"."
    },
    "transmission": {
      "type": "string",
      "description": "e.g. \"manual\", \"automatic\"."
    },
    "body_type": {
      "type": "string",
      "description": "e.g. \"hatchback\", \"estate\", \"suv\", \"saloon\"."
    },
    "location": {
      "type": "string",
      "description": "UK city or region, e.g. \"Manchester\", \"Belfast\"."
    },
    "limit": {
      "type": "integer",
      "description": "Max results, 1–25. Defaults to 10."
    }
  }
}

estimate_running_costs

Estimate what a specific car on Autoza actually costs to own for a year — road tax, fuel, servicing, MOT and insurance, plus three-year depreciation where it can be worked out. Pass the listing URL or id returned by search_used_cars. This answers the question buyers actually have ("what will this cost me?") rather than just the sticker price. Components that cannot be worked out from the listing are omitted rather than guessed, and the response says which.

Parameters2

listing_url	string	optional	Full autoza.co.uk listing URL as returned by search_used_cars.
listing_id	string	optional	Listing id, if you have it instead of the URL.

Raw schema

{
  "type": "object",
  "properties": {
    "listing_url": {
      "type": "string",
      "description": "Full autoza.co.uk listing URL as returned by search_used_cars."
    },
    "listing_id": {
      "type": "string",
      "description": "Listing id, if you have it instead of the URL."
    }
  }
}

get_uk_price_guide

Get current UK used-car asking-price guidance from live verified-dealer listings — typical, lowest and highest asking price, optionally narrowed to a make or model. Prices are GBP and reflect what dealers are asking right now, not trade or valuation estimates. Use to answer "what do X cost used in the UK" or to sanity-check whether an advertised price is reasonable.

Parameters2

make	string	optional	Optional: narrow to a manufacturer.
model	string	optional	Optional: narrow to a model.

Raw schema

{
  "type": "object",
  "properties": {
    "make": {
      "type": "string",
      "description": "Optional: narrow to a manufacturer."
    },
    "model": {
      "type": "string",
      "description": "Optional: narrow to a model."
    }
  }
}

Autoza UK

autoza-uk (io.github.Screed369/autoza-uk)

🛠️ Key Features

🚀 Use Cases

⚡ Developer Benefits

⚠️ Limitations

calculate_car_tax

check_clean_air_zone

check_mot_due_date

get_model_reliability

search_used_cars

estimate_running_costs

get_uk_price_guide

Install

Remote endpoint

Related servers