Netherlands address verification and geocoding (adres, postcode + huisnummer)
Netherlands address verification and geocoding (adres, postcode + huisnummer): send a postcode + house number or free text, get the official address from the national BAG register (does it exist, exact spelling), WGS84 latitude/longitude, BAG ids, municipality, province and CBS neighbourhood code. Cheap address validation for KYC, onboarding, delivery, CRM cleanup and real estate agents. Source: Kadaster BAG via PDOK.
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://factline.dev/v1/address/lookup
| Category | Code and developer |
|---|---|
| Provider host | factline.dev |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 3 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
We never call tools that send, buy, move money or file anything, not even without paying.
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"house_number": 100,
"postcode": "2517AS"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"addition": {
"description": "Optional house number addition, e.g. 2 or BIS",
"type": "string"
},
"house_letter": {
"description": "Optional house letter, e.g. A",
"type": "string"
},
"house_number": {
"description": "House number, e.g. 1",
"minimum": 1,
"type": "integer"
},
"postcode": {
"description": "Dutch postcode, 4 digits + 2 letters, e.g. 3511LX",
"pattern": "^[1-9][0-9]{3} ?[A-Za-z]{2}$",
"type": "string"
},
"q": {
"description": "Alternative to postcode: free-text address, e.g. 'Visschersplein 1 Utrecht'",
"type": "string"
}
},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}