{"uid":"cap_s5iEirNEMn13oXyYSVgYJ","slug":"dutch-bag-building-lookup-by-postcode-house-number-97a3d7e5","name":"Dutch BAG Building Lookup by Postcode + House Number","description":"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.","url":"https://api.agenticweb.nl/api/v1/nl/building","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"postcode":{"type":"string","description":"Dutch postcode, e.g. 1011AC."},"huisnummer":{"type":"number","description":"House number."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_GWqNMwVqfJZx3jMToO33w","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns construction year, floor area, use function, and status for a Dutch building using BAG data, identified by postcode and house number.","exampleAgentPrompt":"What does the Dutch building registry say about the property at postcode 2511BX, house number 1? I need the construction year, floor area, and official use function.","exampleUseCases":[{"title":"Verify property age before purchase","prompt":"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?"},{"title":"Check building use classification","prompt":"Is the building at postcode 1017CT, house number 5 in Amsterdam officially registered as residential or commercial use in the BAG?"},{"title":"Enrich real estate listing data","prompt":"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?"}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T18:36:49.874Z","isFirstParty":false}