Guides · API

Compare Dutch addresses API

Compare 2 to 5 Netherlands addresses side by side, in English, for house-hunting, relocation and real estate agents: liveability, crime, home values, floor area, year built, distances to station, supermarket, school and GP, noise, air quality and ground height, plus the best address per metric and the full property report for each. Input: addresses separated by ';'.

0.08 USDC per call · GET /v1/home/compare · free preview at /v1/home/compare/preview

Parameters

Name	Required	Description
`addresses`	yes	2 to 5 Dutch addresses separated by ';', each as 'postcode house_number' or free text, e.g. '3511LX 1; 2517AS 100'

Example request

curl "https://factline.dev/v1/home/compare?addresses=3511LX+1%3B+2517AS+100"
# 402 Payment Required: pay with an x402 client (USDC on Base), or send
# Authorization: Bearer <your Factline API key>

Example response

{
  "count": 2,
  "comparison": [
    {
      "address": "Visschersplein 1, 3511LX Utrecht",
      "liveability_percentile": 89,
      "crime_per_1000": 539.7,
      "avg_home_value_eur": 585000,
      "km_to_train_station": 1.6
    },
    {
      "address": "Laan van Meerdervoort 100, 2517AS 's-Gravenhage",
      "liveability_percentile": 91,
      "crime_per_1000": 62,
      "avg_home_value_eur": 403000,
      "km_to_train_station": 2.9
    }
  ],
  "best_by": [
    {
      "metric": "liveability",
      "best": "Laan van Meerdervoort 100, 2517AS 's-Gravenhage",
      "why": "highest Leefbaarometer percentile"
    }
  ]
}

Use it from an AI agent

Agents with an x402 wallet call the URL directly and pay per request. Assistants that speak MCP connect to https://factline.dev/mcp. Full reference: docs, OpenAPI, llms.txt. Businesses: API keys with a free trial.

Questions

How much does the Compare Dutch addresses cost?

0.08 USDC per call, paid per request with x402 (no account), or included in a Factline API key plan with a free trial. Calls that fail are not charged.

Can I try it for free?

Yes: GET /v1/home/compare/preview with the same parameters validates your input and shows what the paid answer contains, at no cost.

Where does the data come from?

Official public registers and open data, named with their licence in every response (source field) and at /.well-known/x402-license-provenance.