Get your API key

Getting started

Your first property API call
in a few minutes

Sign up, grab a key, and query UK property data over plain REST. Every plan includes all 46 APIs, the MCP server and ChatGPT Actions.

Start your free trial Browse the API hub
REST JSONx-api-key auth46 APIsMCP + ChatGPT

Three steps

From sign-up to first response

1

Start your free trial

Create an account to start a 14-day free trial with 500 test API credits. A card is required to start.

Start free trial
2

Get your API key

Your key is on the dashboard the moment you sign in. Send it in the x-api-key header on every request.

x-api-key: YOUR_API_KEY
3

Make your first call

Point any HTTP client at the base URL below. Structured JSON comes back ready to use.

https://propertyinsights.co.uk/api/v1
GET/api/v1/council-tax/lookup?postcode=S11+8YL
curl "https://propertyinsights.co.uk/api/v1/council-tax/lookup?postcode=S11%208YL" \
  -H "x-api-key: YOUR_API_KEY"
const res = await fetch(
  "https://propertyinsights.co.uk/api/v1/council-tax/lookup?postcode=S11%208YL",
  { headers: { "x-api-key": process.env.PI_API_KEY } }
);
const data = await res.json();

The essentials

What you need to know

Base URL

All 46 APIs live under one base.

https://propertyinsights.co.uk/api/v1

Authentication

Send your key in the x-api-key request header. No OAuth, no SDK required.

Credits

Most calls cost 1 credit. Address autocomplete suggestions are free, successful UPRN lookups cost 35 credits, and weighted property reports publish their full cost in the API Hub. Successful responses report billing.creditsCharged, billing.creditsRemaining and billing.creditsRefreshAt. Matching X-Credits-* headers are also available to clients.

Rate limits

Every successful response returns X-RateLimit-Limit, X-RateLimit-Remaining and X-RateLimit-Reset. Over the limit you get a 429.

OpenAPI spec

Generate a typed client in your language from the OpenAPI schema, or use any HTTP client you already have.

Errors

Predictable JSON errors with a status code and message. A missing key returns 401, a bad request returns 400.

Agent ready

Call the data from your AI agent

The same API key works across the REST API, our MCP server and ChatGPT Actions, so agents can call every endpoint as a typed tool.

Read the MCP docsSet up ChatGPT Actions
mcp.propertyinsights.co.uk
# Claude Code
claude mcp add property-insights \
  https://mcp.propertyinsights.co.uk/mcp

Reference

Every API, fully documented

Jump straight into any endpoint. Each guide has parameters, response schema, worked examples and error handling.

Address and identity

Address autocompleteAdd Great Britain address autocomplete and autofill with free suggestions, UPRNs, coordinates, and structured form fields.

Property intelligence

Property analysisDeep dive comparison data including sold prices, crime rates, council tax bands, and comprehensive market intelligence.Property valuationAutomated property valuation using HPI and comparable sales methods with confidence scoring.Property boundaryResolve a UPRN, HM Land Registry title number, and INSPIRE boundary geometry for an address in England or Wales.Due diligencePrioritised enquiry prompts from open screening data with optional OS property context.Flood riskRiver, sea, surface-water, reservoir and English coastal-risk screening from free official mapping.Ground and miningCoal-mining matches, nearby recorded landslides and BGS 1:50,000 geological context.Environmental riskFlood, radon, noise, landfill, coal mining, invasive plants, current air and groundwater-protection factors with explicit data status.UPRN and addressLook up a canonical Great Britain address from a UPRN, or match an address and postcode to its UPRN.Property profileCreate a concise property profile with identity, title, tenure, property facts, Council Tax and review enquiries.Land Registry titlesMatch HM Land Registry titles, check document availability, purchase official copies and extract register text.Information packsGenerate a private, customer-branded PDF combining property, valuation, market, EPC, council tax, ownership, crime, schools and finance data.Renovation upliftCalculate adjusted property values with extensions, renovations, and quality uplift scenarios.EPC certificatesRetrieve current Energe Performance Certificates (EPC) data, ratings, and recommendations.Internal floor areaAccess detailed internal floorspace measurements and area data for UK properties.

Market and ownership

Corporate ownershipAccess 4.3M+ records of UK properties owned by UK and overseas companies.Sold comparablesFind comparable sales nearby with enrichment data like price per sq ft and bedroom counts.Sold price historyHistorical transaction data filtered by location, property type, and date range.Area sold pricesComplete sold price history for any UK postcode area with filtering, pagination, and street-level search.House price indexOfficial UK HPI data for tracking market trends at regional and national levels.

Area and location

Council taxPostcode, property, and billing-authority council tax lookup across England, Scotland, and Wales with tax-year support.Crime statisticsHyper-local crime data aggregated by postcode, including outcome status and crime types.Area analyticsAggregated intelligence on demographics, transport, and amenities for any postcode sector.DeprivationEnglish deprivation scores, ranks, deciles, domain breakdowns, and local authority context for a postcode.DemographicsCombined Census 2021 age, household, tenure, bedroom, ethnicity, religion, qualification, and occupation data.LiveabilityNeighbourhood liveability scores with safety, social, amenity, school, crime, and Census context.BroadbandAggregated Ofcom broadband availability, coverage, and predicted speed data for a postcode.Mobile coverageAggregated Ofcom signal scores and technology availability for EE, Vodafone, Three, and O2.Planning constraintsKnown listed building, conservation area, Article 4, and tree preservation constraints near a location.SchoolsDetailed performance data, catchment info, and Ofsted ratings for 51k+ UK schools.

Finance and economy

Stamp dutyInstant, accurate logic for 2026 UK Stamp Duty Land Tax, including additional dwelling surcharges.Mortgage ratesLive tracking of UK mortgage rates with Bank of England data across all LTV bands.Bank ratesMonitor current and historical bank interest rates from major UK financial institutions.Inflation ratesUK Consumer Price Index (CPI) inflation data with monthly readings and historical trends from 1989.

Ready to make your first call?

Start a 14-day free trial with 500 test API credits and build straight away.

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