Summary
Wraps 24 UK data endpoints behind x402 crypto micropayments, letting Claude look up property sale prices from HM Land Registry, estimate rental yields from VOA data, calculate stamp duty, plus weather, company, vehicle, and finance info. The interesting bit is the payment layer: requests are gated by x402, so agents pay per call rather than you managing API keys or subscriptions. Built on FastAPI with Redis caching and rate limiting per wallet address. You'd use this if you're building an AI assistant that needs authoritative UK data and you want usage based billing without setting up Stripe. Deployed on Railway, exposes SSE transport for streaming.
Keep your Mac awake while Claude Code and 40+ AI agents run. Sleeps when they're idle.
One time payment $9 →
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UK Property Data API — Production Version
What This Is
A paid API that lets AI agents (and humans) look up UK property data:
| Endpoint | What It Does | Data Source |
|---|---|---|
/sold-prices | Recent sale prices for a postcode | HM Land Registry (free, public) |
/yield-estimate | Estimated rental yield for a postcode | VOA council tax / rental data |
/stamp-duty | UK Stamp Duty (SDLT) calculation | HMRC rules coded in Python |
Payments are handled by the x402 protocol — an HTTP-native payment standard where AI agents pay per-request using crypto wallets.
How the Code Is Organised
uk-property-api/
│
├── app/ # All application code lives here
│ ├── main.py # The "front door" — starts the server
│ ├── config.py # All settings (read from environment variables)
│ │
│ ├── routes/ # One file per endpoint (URL path)
│ │ ├── sold_prices.py # /sold-prices
│ │ ├── yield_estimate.py # /yield-estimate
│ │ └── stamp_duty.py # /stamp-duty
│ │
│ ├── services/ # Business logic (the "brains")
│ │ ├── land_registry.py # Talks to Land Registry SPARQL API
│ │ ├── voa_rental.py # Rental yield calculations
│ │ └── sdlt.py # Stamp duty maths
│ │
│ ├── middleware/ # Code that runs BEFORE your endpoints
│ │ ├── payment.py # x402 payment verification
│ │ ├── rate_limiter.py # Stops one wallet spamming requests
│ │ └── cache.py # Redis caching (saves repeat lookups)
│ │
│ └── models/ # Data shapes (what requests/responses look like)
│ └── schemas.py # Pydantic validation models
│
├── tests/ # Automated tests
│ ├── test_sdlt.py # Stamp duty calculation tests
│ └── test_yield.py # Yield estimate tests
│
├── Makefile # Shortcuts: `make dev`, `make test`, `make deploy`
├── requirements.txt # Python packages to install
├── Procfile # Tells Railway how to start the app
├── railway.toml # Railway-specific settings
└── .env.example # Template for your secret settings
Quick Start (Local Development)
# 1. Install Python 3.11+ then:
make install
# 2. Copy the example env file and fill in your values
cp .env.example .env
# 3. Start the server locally
make dev
# 4. Open the docs in your browser
# http://localhost:8000/docs
Deploy to Railway
# 1. Install Railway CLI: https://docs.railway.app/guides/cli
# 2. Login and link your project
railway login
railway link
# 3. Add a Redis plugin in the Railway dashboard
# (click "New" → "Database" → "Redis")
# 4. Set your environment variables in Railway dashboard:
# X402_FACILITATOR_URL, PAYMENT_WALLET_ADDRESS, etc.
# 5. Deploy
make deploy
Running Tests
make test
Environment Variables You Need
| Variable | What It Is | Example |
|---|---|---|
REDIS_URL | Redis connection string | redis://default:xxx@host:6379 |
X402_FACILITATOR_URL | x402 payment facilitator | https://x402.org/facilitator |
PAYMENT_WALLET_ADDRESS | Your wallet (receives payments) | 0xYourAddress... |
RATE_LIMIT_PER_MINUTE | Max requests per wallet per minute | 30 |
CACHE_TTL_SECONDS | How long to cache results | 3600 |
LOG_LEVEL | Logging verbosity | INFO |
Featured
Keep your Mac awake while Claude Code and 40+ AI agents run. Sleeps when they're idle.
One time payment $9 →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →On Capafy, your Skill runs online 24/7 as an agent product, and you get paid every time someone uses it.
Start earning →
