MarketCode

UK residential and commercial property data

Decide what to pursue. And what to investigate next.

Prioritise sites for deeper appraisal, examine the evidence behind a price and identify what still needs checking. MarketCode connects property records and market analysis in your AI assistant or through our API.

API and MCP access available now. Valuation, Insights and Sourcing web apps are in early access by request.

Coverage varies by dataset and location. Scottish coverage is expanding soon. Check coverage and availability.

Compatible assistants

Claude

[

Property evidenceCaptured 06 Sep 2026

A price is a starting point.

UPRN 200003443835 · SE22

Indicative estimate

£440,830

£227,909£668,415

Model range · not a professional valuation

One assumption to challenge

Floor area is copied from the building, not directly observed for the unit.

](https://marketcode.ai/examples/property-brief)

Inspect the evidence

A useful brief makes the next question clearer.

Explore dated API captures and our interpretation of what to check next. These are product demonstrations, with gaps visible; they do not represent customer outcomes.

Property investors

Which pricing assumptions need checking?

A captured residential estimate with a wide range and an unresolved floor-area assumption.

Inspect the example →

Planning and land teams

Which site checks still need resolving?

London planning records alongside a failed designation check: a reason to investigate, not a clean bill of health.

Inspect the example →

Commercial agencies and investors

What evidence belongs in the next commercial conversation?

A Manchester retail rating-based series shows why a market measure cannot stand in for a current lease.

Inspect the example →

Focus market research

Compare the relevant area, cohort and observation period to decide where a headline needs closer investigation.

Explore property markets →

Building a property product?

Inspect sample responses, coverage, licensing and usage costs against one defined integration requirement.

Canary Wharf, London · Illustrative location Photography: Fadi Ezzi / Pexels

Commercial property research

Go into the next conversation with better questions.

Recorded characteristics, ownership context and market evidence can help shape an acquisition-research agenda. The useful part is knowing which assumptions still need checking.

Recorded factsModel estimatesMissing evidence

Inspect a commercial example

One core, four products

One data layer. A product for each job.

Use the data through your assistant or API today. Request a demonstration to discuss access to the web apps.

The data core

Property records, energy certificates, planning evidence, corporate ownership, listings and auction results, connected where records can be matched. Examine the unit and building relationship, source dates and unresolved matches before relying on an output.

How matching and analysis work →

Works with your agent

Use it in your existing workflow.

One URL, one sign-in. No API key. 100 free credits when you sign up.

Claude

How it works

Connect once. Then ask, or run a skill.

01

Connect

One URL and an OAuth sign-in for Claude, ChatGPT, Codex, Cursor or Claude Code. An API key if you are writing code.

02

Ask, or run a skill

Start with the decision you need to make. Research skills guide the calls and organise the evidence for review.

03

Data origins

Inspect the sources behind the evidence.

About the data core · Sources and licences

Rightmove HM Land Registry Ordnance Survey Companies House Environment Agency Royal Mail

Pricing

Start with credits. Pay for the calls you use.

A free endpoint does not make a complete research workflow free. Include address, comparable and ownership calls when estimating cost.

Free

100 credits

on your first sign-in

Pack

2,500 credits

£125, no expiry

Pack

10,000 credits

£400, no expiry

See every price

Frequently asked

Questions we get asked.

What is MarketCode?+

UK property data and analytics to help prioritise opportunities, challenge pricing assumptions and focus further investigation. Access through an AI assistant or REST API; web apps are in early access by request.

What is a skill?+

A short markdown file that tells an agent how to produce a piece of work: which calls, in what order, what they cost, how to lay out the result with every figure cited. Install the plugin in Claude Code, or paste a skill into any other client.

Do I need an API key?+

Not for an AI assistant. The MCP server signs you in with OAuth and never asks for a key. API keys are for the REST API; you create them in the Hub.

Bring a property you know.

Bring an address, site or commercial asset and a decision you need to make. We will examine the evidence, the gaps and a useful next step together.