# Penny Data: Pay-per-call data for AI agents

> Pay-per-call UK data APIs for AI agents: Companies House company profiles and Great Britain postcode lookups, as JSON. Pay with x402 in USDC on Base; no API key or account.

## How to pay

- All routes: pay per call on Base (eip155:8453) in USDC, x402 scheme "exact". No API key, no account, no gas needed by the buyer.
- Flow: the first request returns 402 with payment details in the PAYMENT-REQUIRED header (base64 JSON). Sign the payment with an x402 client (for example @x402/fetch) and retry with the PAYMENT-SIGNATURE header.
- Charged only for a 200. Malformed input (400), not found (404) and upstream unavailable (502) are never settled.

## Services

### UK Company Lookup

- Endpoint: GET https://x402-lab.vercel.app/api/company/{number}
- Example: GET https://x402-lab.vercel.app/api/company/00445790
- Price: 0.005 USDC per call
- Input: Companies House company number: up to 8 digits, or a 2-letter prefix such as SC followed by digits.
- Returns: Name, status, type, incorporation date, registered office, SIC codes, and when the next accounts and confirmation statement are due. Empty fields are null.
- Source: Contains public sector information from Companies House, licensed under the Open Government Licence v3.0. Not affiliated with Companies House.

### UK Postcode Lookup

- Endpoint: GET https://x402-lab.vercel.app/api/postcode/{postcode}
- Example: GET https://x402-lab.vercel.app/api/postcode/SW1A1AA
- Price: 0.002 USDC per call
- Input: Great Britain postcode, with or without the space, any case. Northern Ireland (BT) is not supported.
- Returns: The postcode, its latitude and longitude, and its ward, district, parliamentary constituency, region and country. Empty fields are null.
- Source: Data from postcodes.io. Great Britain postcode data under the OS OpenData licence. Contains Ordnance Survey data © Crown copyright and database right 2025. Contains Royal Mail data © Royal Mail copyright and database right 2025. Contains National Statistics data © Crown copyright and database right 2025. Contains NRS data © Crown copyright and database right 2025.

## Links

- [Documentation](https://x402-lab.vercel.app/docs)
- [OpenAPI](https://x402-lab.vercel.app/openapi.json)
- [x402 manifest](https://x402-lab.vercel.app/.well-known/x402)
- [Payments ledger](https://x402-lab.vercel.app/stats)

Contact: hello@syedwebsites.co.uk