REST · JSON · OpenAPI 3.136 endpoints

The UK Property Data API.

36 endpoints. 29 million properties. Land Registry, EPC, landlord, market, and planning data — all through a single authenticated API.

BEARER· authenticatedOpenAPI3.1
request.sh
# Authenticate with your API key
curl "https://api.propalt.ai/property" \
  -G \
  -d "postcode=SW1A1AA" \
  -H "Authorization: Bearer $PROPALT_KEY"

# Response — deterministic JSON
{
  "property_id": "prop_8f3a1b",
  "uprn": "100021888688",
  "epc": { "rating": "D", "score": 62 },
  "value": { "estimate": 4200000, "confidence": "high" },
  "_meta": { "refreshed": "2026-05-13" }
}
[ POWERED BY ]Eight authoritative UK registers
02 · Use cases

What Will You Build?

Five common patterns built on Propalt today. Pick one to see the endpoints, sample responses, and starter templates.

03 · AI & automation

Designed for AI Agents and Automation

Every response is shaped for machine consumers first: deterministic schemas, resolved identifiers, and grounded facts.

F.01

Deterministic JSON

Consistent, structured responses. No ambiguity. Machine-readable every time.

F.02

Unified data

8 official sources normalised into one schema. One API, complete UK coverage.

F.03

Agent-ready

Normalised entities built for copilots, LLM tool calls, and automated workflows.

F.04

Verified facts

Sourced from official registers. Minimise hallucinations with real property data.

MCP Server NEWChatGPT PluginDocs for AI — OpenAPI & Markdown

36 endpoints across 11 categories.

Browse by category or search by keyword. Every endpoint links to full documentation with sample requests and responses.

View full API documentation with sample requests →
05 · Integrate

Integrate with Your Stack

▸ REST

REST API

Standard JSON responses. Works with any HTTP client or SDK. Bearer-token auth.

▲ MCP

MCP Server

Connect to Claude Code, Cursor, Windsurf natively. Natural language queries.

◆ OPENAPI

OpenAPI Spec

Download and generate typed clients in any language automatically.

Pick a plan that fits your usage.

Start free with 500 credits per month. Scale up as usage grows. No contracts, no minimum term. MCP access included on every plan.

Free

For trying the API

£0/mo500 credits/mo
  • All 30+ endpoints
  • MCP server access
  • 10 req/sec rate limit
  • 1 team seat
Developer

For solo builders & small apps

£49/mo5,000 credits/mo
  • Everything in Free
  • 50 req/sec rate limit
  • 3 team seats
  • Webhooks & usage analytics
  • Email support
Agency

For client work & resold data

£499/mo100,000 credits/mo
  • Everything in Startup
  • 500 req/sec rate limit
  • Unlimited team seats
  • White-label widgets & SSO
Need a custom plan?
High-volume, enterprise, or reseller pricing available. Talk to us about unlimited seats, dedicated infrastructure, and SLA guarantees.
Ready to integrate

Stop stitching data sources. Start shipping.

One API key. 36 endpoints. 29 million properties. Free to start.