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Dutch BAG Building Lookup by Postcode + House Number
x402
Dutch BAG Building Lookup by Postcode + House Number is a paid API for AI agents from api.agenticweb.nl, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Returns construction year, floor area, use function, and status for a Dutch building using BAG data, identified by postcode and house number.
Price / call$0.01
Success—
StatusUnknown
How this service works
Dutch building (BAG) lookup by postcode + house number: construction year, floor area, use function, status. Send the parameters in a JSON request body via POST. Payment constitutes acceptance of the terms at https://agenticweb.nl/terms.
Output
Returns structured BAG data for the specified building including: construction year (bouwjaar), official floor area in m² (oppervlakte), use function (gebruiksfunctie, e.g. woonfunctie/kantoorsfunctie), and registration status (status) of the building object.
Example use cases
Verify property age before purchase
“I'm looking at buying an apartment at postcode 3512HE, house number 22 in Utrecht — can you pull the construction year and floor area from the Dutch building registry so I know what I'm dealing with?”
Check building use classification
“Is the building at postcode 1017CT, house number 5 in Amsterdam officially registered as residential or commercial use in the BAG?”
Enrich real estate listing data
“For each of my property listings, starting with postcode 2024EA house number 3, can you fetch the official floor area and building status from the Dutch BAG so I can add accurate specs to the listing?”
Technical details
Endpoint
POSThttps://api.agenticweb.nl/api/v1/nl/buildingWhen to prefer
Use this endpoint when you need official Dutch building attributes (construction year, floor area, use function, status) from the authoritative BAG registry for a known postcode and house number. Prefer this over the address lookup endpoint when building-specific attributes matter rather than geographic coordinates. Best suited for property due diligence, real estate enrichment, compliance checks, or any workflow requiring verified building metadata for Dutch addresses.
Side effects
- Postcode or house number not found in BAG — returns 404 or empty result
- Invalid postcode format causes validation error
- Building exists but has no floor area recorded (some buildings lack oppervlakte)
- Payment not processed — request rejected before lookup
- House number addition required to disambiguate but not provided, returning wrong unit
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| postcode | string | Dutch postcode, e.g. 1011AC. |
| huisnummer | number | House number. |
Tags
x402
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