Postcodes & addresses · x402
uk-postcode
UK postcode lookup and validation (postcodes.io, ONS/OS open data): country, region, district, ward, parish, constituency, lat/lon, eastings/northings, NUTS; terminated postcodes detected; reverse lookup from lat/lon.
0.001 USDC / call · {atomic} atomic · 1000 atomic
Endpoint
GET|POST https://forge-tools.dentreprise.workers.dev/api/uk-postcode
Parameters
| Name | Required | Type | Description |
|---|---|---|---|
postcode | Optional | string | UK postcode |
lat | Optional | string | reverse: latitude |
lon | Optional | string | reverse: longitude |
Example request (unpaid — expect 402)
curl -sS -D - "https://forge-tools.dentreprise.workers.dev/api/uk-postcode?postcode=SW1A+1AA"
Example 402 challenge
The same object is also sent as a base64 PAYMENT-REQUIRED header. Amounts are atomic USDC units (6 decimals).
{
"x402Version": 2,
"error": "Payment required",
"resource": {
"url": "https://forge-tools.dentreprise.workers.dev/api/uk-postcode",
"description": "UK postcode lookup and validation (postcodes.io, ONS/OS open data): country, region, district, ward, parish, constituency, lat/lon, eastings/northings, NUTS; terminated postcodes detected; reverse lookup from lat/lon.",
"mimeType": "application/json"
},
"accepts": [
{
"scheme": "exact",
"network": "eip155:8453",
"amount": "1000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0x7B8bf45ac6AcbA6D4CFB626b57D3f5fF3C9C89F7",
"maxTimeoutSeconds": 120,
"extra": {
"name": "USD Coin",
"version": "2"
}
}
]
}Retry with payment
curl -sS "https://forge-tools.dentreprise.workers.dev/api/uk-postcode?postcode=SW1A+1AA" \ -H "PAYMENT-SIGNATURE: $PAYMENT"
Example response
{
"valid": true,
"postcode": "SW1A 1AA",
"admin_district": "Westminster",
"lat": 51.501,
"lon": -0.1416
}