Postcode

Guest listing — SiteCheck. Place names and coordinates for a postcode. GB adds district, ward and constituency (postcodes.io); other countries use Zippopotam.us for ZIP and postal codes. A postcode that does not exist answers 404, not charged.

GET https://api.sitecheck-api.workers.dev/api/postcode

0.002 USDC on Base · payTo 0xb8491F953e6860D3b5840b73c60883Ff099ceAfA

Status: verified · payable

Settlement: direct to the seller's payTo — 0% HIVE402 take

Payment routes

Base · 0.002 USDC · payTo 0xb8491F953e6860D3b5840b73c60883Ff099ceAfA · via guests · settles direct

Solana · 0.002 USDC · payTo J8vnmBx4pS1X7UUBTfz1yWBKiw69Dj2yRGRHDaXBRdhR · via guests · settles direct

Arc · 0.002 USDC · payTo 0xa4751fCAa83c9669cfe507bb6807507729839be3 · via guests · settles direct

XRPL · 0.001535 XRP · payTo rDxNZCDfLxUzeMWGGwsY3sjQT8eoZCf8UJ · via guests · settles direct

{
  "attribution": "Contains OS data © Crown copyright and database right; postcodes.io (Open Government Licence v3.0)",
  "checkedAt": "2026-10-14T04:49:24.511Z",
  "code": "SW1A 1AA",
  "country": "GB",
  "places": [
    {
      "constituency": "Cities of London and Westminster",
      "county": null,
      "district": "Westminster",
      "lat": 51.50101,
      "lon": -0.141563,
      "placeName": "St James's",
      "region": "London"
    }
  ],
  "source": "postcodes.io (https://api.postcodes.io)"
}