Geocoding — entry 065 of 80
PostcodeData.nl
PostcodeData.nl is a free, keyless Dutch postcode-lookup API: given a 4-digit-plus-2-letter postcode and house number it returns the street, city, municipality, province, RD (Rijksdriehoek) coordinates, and WGS84 lat/lon in JSON or XML. It's HTTP-only — there's no working TLS endpoint, so requests over https fail with a 502 gateway error.
AuthenticationNone requiredCall it straight away — no key, no signup.
HTTPSNot supportedPlain HTTP only — avoid sending anything sensitive.
CORSEnabledCallable directly from browser JavaScript.
PricingFreeNo paid tier — free for the documented use case.
FormatsJSON, XMLResponses can be requested as JSON or XML.
GreatAPIs Score
Score80
Authentication25/25No authentication required
Pricing20/20Free to use
Docs0/20No docs or spec available
Formats15/15Supports 2 response formats
Freshness20/20Verified within 6 months
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<a href="https://greatapis.com/api/postcodedata-nl/"><img src="https://greatapis.com/badge/postcodedata-nl.svg" alt="Scored 80 on greatapis.com"></a>Auth quickstart
- No key needed — call it now.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.