Leadtool API

get

Offer a free home valuation report to website visitors.

Authorizations

BearerAuth

AuthorizationstringRequired

Bearer authentication header of the form Bearer <token>.

Query parameters

postcodestringRequired

Postal code

Example: 1251NJ

houseNumberintegerRequired

House number

Example: 22

houseLetterstringOptional

House letter

houseNumberExtstringOptional

House number extension

typestring · enumOptional

Type of dwelling

Example: 2-onder-1-kapwoningPossible values:

buildYearintegerOptional

Indication of the year in which the building will originally be delivered in, or is architecturally ready. Also known as construction year.

Example: 1955

useSurfaceintegerOptional

The usable surface area of a property object in m2.

Example: 104

parcelSurfaceintegerOptional

The lot/parcel surface in m2.

Example: 338

volumeintegerOptional

Volume in m3.

Example: 411

numberOfRoomsintegerOptional

Number of rooms.

Example: 5

energyLabelstring · enumOptional

A label indicating how well the property object is insulated.

Example: EPossible values:

monumentbooleanOptional

Boolean indicating whether the house is a monument.

Default: falseExample: false

valuationDatestring · dateOptional

Valuation date

Default: 2026-07-09Example: 2026-07-09

Responses

200

LeadtoolResponse

application/json

idstring · nullableOptionalExample: string

statusstringRequiredExample: success

400

HTTP 400

application/json

401

HTTP 401

application/json

403

HTTP 403

application/json

404

HTTP 404

application/json

500

HTTP 500

application/json

get/leadtool

HTTPcURLJavaScriptPython

GET /v1/leadtool?postcode=1251NJ&houseNumber=22 HTTP/1.1
Host: api.matrixian.com
Authorization: Bearer YOUR_SECRET_TOKEN
Accept: */*

{
  "id": "string",
  "params": {
    "postalCode": "1251NJ",
    "houseNumber": 22,
    "houseLetter": null,
    "houseNumberExt": null,
    "type": "2-onder-1-kapwoning",
    "buildYear": 1955,
    "useSurface": 104,
    "parcelSurface": 338,
    "volume": 411,
    "numberOfRooms": 5,
    "energyLabel": "E",
    "monument": false,
    "valuationDate": "2026-07-09"
  },
  "data": {
    "houseNumber": 22,
    "houseNumberExt": null,
    "postalCode": "1251NJ",
    "references": [
      {
        "city": "Laren",
        "houseNumber": 22,
        "houseNumberExt": null,
        "latitude": 52.25291881,
        "longitude": 5.23903348,
        "postalCode": "1251NJ",
        "street": "Graafland"
      }
    ],
    "weightedValueRange": "450000 - 500000"
  },
  "error": {},
  "meta": {},
  "status": "success"
}