# fourzerotwo

> Pay-per-call data APIs for AI agents. Every endpoint answers HTTP 402 with x402 payment requirements; pay in USDC and retry with a PAYMENT-SIGNATURE header. No accounts, no API keys.

- MCP server (streamable HTTP, x402 over MCP): https://fourzerotwo.si/mcp
- Machine-readable catalog: https://fourzerotwo.si/catalog.json
- Network: eip155:84532 (USDC)

## Endpoints

- [UK Bank Holidays: All bank holidays](https://fourzerotwo.si/v1/uk-bank-holidays/all): Every published UK bank holiday by division. — $0.001 per call. Params: 
- [UK Gazette Estates: Search deceased estates](https://fourzerotwo.si/v1/uk-gazette/deceased-estates): Search UK deceased-estates notices by the deceased's name, optionally narrowed to a year of death. — $0.01 per call. Params: name, death_year?, limit?
- [UK Gazette Estates: Notice detail](https://fourzerotwo.si/v1/uk-gazette/notice): Structured detail for one deceased-estates notice: address, date of death, executor and claim deadline. — $0.02 per call. Params: notice_id
- [UK Postcodes: Postcode lookup](https://fourzerotwo.si/v1/uk-postcodes/lookup): Full ONS record for one UK postcode, including latitude/longitude and administrative areas. — $0.002 per call. Params: postcode
- [UK Postcodes: Nearest postcodes](https://fourzerotwo.si/v1/uk-postcodes/nearest): Postcodes nearest to a given UK postcode. — $0.002 per call. Params: postcode, limit?