# Factline Dutch House Prices

> Factline Dutch House Prices is a paid API for AI agents from factline.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-11).

Returns average WOZ home values and actual sale prices for a Dutch neighbourhood or municipality, given a postcode or CBS neighbourhood code.

## Facts

- Endpoint: GET https://factline.dev/v1/house-prices?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/factline-dutch-house-prices-593e66e9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ncHlyp3df3_n0lhzAUEf3

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-house-prices-593e66e9
```

Example prompt: What's the average WOZ home value and recent sale price trend for the neighbourhood around postcode 2512AB in The Hague, and how does it compare to the Dutch national average?

## When to prefer this

Use this endpoint when you need authoritative Dutch housing price data sourced directly from CBS and Kadaster — specifically WOZ valuations at neighbourhood level and actual transaction sale prices at municipality level. Prefer this over general property portals when you need structured, machine-readable data with year-on-year and 5-year trend figures for agent workflows, investment analysis, or real estate enrichment pipelines.

## Known failure modes

- Invalid or unrecognised postcode returns an error or empty result
- CBS neighbourhood code not found in dataset
- Missing required query parameter (neither postcode nor code supplied)
- Data not yet available for very recently created neighbourhoods
- Rate limiting or payment failure via x402 micropayment

## 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 data source (CBS/Kadaster), the matched neighbourhood code and name with its municipality, the neighbourhood's average WOZ home value in EUR, and the municipality's average sale price in EUR for the latest year alongside the national average sale price and the 5-year price change percentage.

## 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",
     "properties": {
      "code": {
       "type": "string",
       "description": "Alternative: CBS neighbourhood code, e.g. BU03440612"
      },
      "postcode": {
       "type": "string",
       "description": "Any Dutch postcode in the neighbourhood, e.g. 3511LX"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "source": "CBS (WOZ values; sale prices 83625NED)",
  "neighbourhood": {
   "code": "BU05182245",
   "name": "Zeeheldenkwartier",
   "municipality": "'s-Gravenhage"
  },
  "municipality_sale_prices": {
   "year": 2025,
   "change_5y_pct": 30.8,
   "municipality_code": "GM0518",
   "avg_sale_price_eur": 465418,
   "national_avg_sale_price_eur": 479527
  },
  "neighbourhood_avg_home_value_eur": 403000
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/factline-dutch-house-prices-593e66e9/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)