API catalog

Every endpoint is paid per call over x402 (USDC on Base) and answers a free sample at ?sample=1. All responses use the same { data, meta } envelope.

Machine-readable: interactive reference · OpenAPI · llms.txt · A2A agent card

Dutch vehicle lookup$0.02

/api/v1/nl/vehicle

Registration, fuel/EV, APK (roadworthiness) and open recalls (terugroepacties) for a Dutch licence plate (kenteken).

Dutch school holidays$0.008

/api/v1/nl/school-holidays

Current, merged Dutch school-holiday dates, queryable by school year, region or a specific date.

Vacation region resolver$0.01

/api/v1/nl/vacation-region

Resolve a Dutch place to its vacation region (noord/midden/zuid) and attach that region's current holiday dates.

Dutch address lookup$0.005

/api/v1/nl/address

Resolve a Dutch postcode + house number to a full address (street, city, gemeente, province, WGS84 + RD coordinates), or reverse-geocode coordinates to the nearest address.

Dutch building lookup (BAG)$0.008

/api/v1/nl/building

Construction year (bouwjaar), floor area (oppervlakte), use function (gebruiksdoel) and status for a Dutch address, from the BAG via PDOK.

Dutch elevation (AHN / NAP height)$0.006

/api/v1/nl/elevation

Ground height above NAP, surface height and derived object height for a Dutch postcode or coordinate, from the AHN 0.5 m height model via PDOK.

Dutch municipality demographics$0.005

/api/v1/nl/demographics

CBS key figures for a Dutch municipality (population, men/women, households, average household size, population density), by gemeente name or CBS code.

Dutch identifier validation$0.001

/api/v1/nl/validate

Offline validation of a Dutch identifier: BSN (elfproef), IBAN (structure + mod-97 + bank), or kenteken (sidecode format).

FX conversion (ECB)$0.003

/api/v1/global/fx

Currency conversion using ECB euro reference rates. Informational only — not tradeable quotes.