# Factline Dutch Postcode Address Lookup

> Factline Dutch Postcode Address Lookup is a paid API for AI agents from factline.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-12).

Returns all registered addresses (with coordinates and BAG IDs) for a given Dutch 6-character postcode from official Kadaster BAG government data.

## Facts

- Endpoint: GET https://factline.dev/v1/postcode/addresses?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/factline-dutch-postcode-address-lookup-7565549f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uBhtb48zUsoC8NzwoZVVn

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability factline-dutch-postcode-address-lookup-7565549f
```

Example prompt: Can you list all the addresses registered under Dutch postcode 2517AS, including their coordinates and house numbers?

## When to prefer this

Use this endpoint when you need official, government-sourced address data for a Dutch postcode, including precise GPS coordinates and BAG object IDs. Prefer it over generic geocoding APIs when you need all addresses within a postcode area (not just a single address lookup), or when you need BAG IDs for integration with Dutch real estate or municipal systems. Best for Netherlands-specific use cases requiring authoritative Kadaster data.

## Known failure modes

- Invalid or malformed postcode (not 6 characters or wrong format) returns an error
- Postcode does not exist in the BAG registry returns empty or zero results
- Upstream PDOK Locatieserver unavailable causes service errors
- Non-Dutch postcodes are not supported

## How this service works

API and MCP servers that let AI agents and apps check people, companies, Dutch addresses and cars against official records: sanctions and PEP lists, 10 company registers, Dutch property, rent and RDW vehicle data. From $0.001 per call.

## Output

A JSON object containing the postcode, city name, total count of addresses found, the data source (Kadaster BAG via PDOK Locatieserver), and an array of address objects each with: full label, street name, house number, optional house letter, optional house number addition, latitude, longitude, and BAG object ID.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "postcode"
     ],
     "properties": {
      "postcode": {
       "type": "string",
       "description": "6-character Dutch postcode, e.g. 2517AS"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "city": "'s-Gravenhage",
  "count": 118,
  "source": "Kadaster BAG via PDOK Locatieserver",
  "postcode": "2517AS",
  "addresses": [
   {
    "lat": 52.08363811,
    "lon": 4.29201429,
    "label": "Laan van Meerdervoort 98, 2517AS 's-Gravenhage",
    "street": "Laan van Meerdervoort",
    "house_letter": null,
    "house_number": 98,
    "bag_object_id": "0518010000688907",
    "house_number_addition": null
   },
   {
    "lat": 52.08359668,
    "lon": 4.29193161,
    "label": "Laan van Meerdervoort 100, 2517AS 's-Gravenhage",
    "street": "Laan van Meerdervoort",
    "house_letter": null,
    "house_number": 100,
    "bag_object_id": "0518010001775699",
    "house_number_addition": null
   },
   {
    "lat": 52.08358839,
    "lon": 4.29191123,
    "label": "Laan van Meerdervoort 100A, 2517AS 's-Gravenhage",
    "street": "Laan van Meerdervoort",
    "house_letter": "A",
    "house_number": 100,
    "bag_object_id": "0518010000432205",
    "house_number_addition": null
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/factline-dutch-postcode-address-lookup-7565549f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from factline.dev](https://www.zero.xyz/host/factline.dev/llms.txt)