80trust / 100

House Prices

by Factline in Developer tools

x402 APIPassing, checked 2 h ago

Use when the user asks what homes cost in a Dutch area: average home value (WOZ) in the neighbourhood with its trend, plus actual average sale prices per year in the municipality vs the national average. Context for an asking price, not a valuation of one home. Input: postcode or CBS buurt code. Source: CBS, Kadaster.

GET https://factline.dev/v1/house-prices

Last 30 days

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Uptime
100%
Response time
60 ms typical, 60 ms slowest 5%
Last check
2 h ago
Next check
any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X GET "https://factline.dev/v1/house-prices?postcode=2517AS"
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ffactline.dev%2Fv1%2Fhouse-prices
const res = await pay("https://factline.dev/v1/house-prices?postcode=2517AS");
console.log(await res.json());

Example input

{
  "postcode": "2517AS"
}

Example output

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

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
2 h agoPassed40260 ms$0.003
7 h agoPassed40285 ms$0.003