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Dutch Postcode Lookup API (CBS Open Data Proxy)
x402
Dutch Postcode Lookup API (CBS Open Data Proxy) is a paid API for AI agents from cbs.thesoulnetwork.eu, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).
Resolves a Dutch postcode and house number to full address details including street, city, municipality, province, and coordinates.
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay $0.01 USDC per call to validate IBANs, EU VAT numbers and Dutch postcodes, and to query CBS housing, company, domain and EU sanctions data on Base Mainnet.
Output
A JSON object containing: whether the postcode is valid, the resolved street name, city, municipality, province, house number, and lat/lon coordinates. Example: {city: 'Amsterdam', street: 'Stadhouderskade', province: 'Noord-Holland', municipality: 'Amsterdam', lat_lon: '52.3633,4.8823', valid: true}.
Example use cases
E-commerce address autocomplete
“A customer entered postcode 2511BG and house number 35 at checkout — can you fill in the street, city, and province for me automatically?”
Delivery route geocoding
“I need the GPS coordinates and municipality for postcode 3014GE, house number 12 in the Netherlands so I can plot it on a delivery map.”
Form validation for Dutch addresses
“Check whether the Dutch postcode 9999ZZ with house number 1 is a real, valid address and tell me what city and province it belongs to.”
Technical details
Endpoint
GEThttps://cbs.thesoulnetwork.eu/postcode?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to resolve or validate Dutch (Netherlands) postcodes to full address data including geocoordinates, municipality, and province. It is pay-per-call at $0.01 USDC via x402 on Base Mainnet, making it ideal for low-volume or on-demand lookups without a subscription. Prefer this over generic geocoding APIs when you specifically need Dutch CBS-sourced address data with municipality and province breakdown.
Side effects
- Invalid or non-existent postcode returns valid: false or empty fields
- Missing required query parameters (code or number) returns a 400-level error
- Payment failure over x402 protocol prevents the call from completing
- Postcode format incorrect (not Dutch 4-digit + 2-letter format) may return no results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"city": "Amsterdam",
"input": "1012AB",
"valid": true,
"street": "Stadhouderskade",
"lat_lon": "52.3633,4.8823",
"province": "Noord-Holland",
"houseNumber": "1",
"municipality": "Amsterdam"
}
}Tags
x402
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