PostcodeData.nl

Overview

PostcodeData.nl is a free public API in the Geocoding category. Provide geolocation data based on postcode for Dutch addresses.

Geocoding APIs turn addresses into coordinates and back — essential for maps, logistics, and location-aware features.

You can use this API in prototypes, side projects, and production applications — just keep the provider’s usage policy in mind.

Authentication

PostcodeData.nl requires no authentication — you can start calling it directly, which makes it great for quick experiments and client-side demos.

HTTPS & CORS

• HTTPS: not supported — PostcodeData.nl is served over plain HTTP only. Avoid sending sensitive data, and prefer HTTPS endpoints where possible.
• CORS: unknown — if you plan to call PostcodeData.nl from the browser, verify CORS support in the official docs or with a quick test request.

Getting Started

1. Read the official documentation: http://api.postcodedata.nl/v1/postcode/?postcode=1211EP&streetnumber=60&ref=domeinnaam.nl&type=json
2. Make a test request with curl or your favourite HTTP client.

Rate Limits & Notes

• Rate limits, quotas, and free-tier terms are defined by the provider — always check the official documentation for PostcodeData.nl before scaling up.
• The upstream listing is community-maintained; fields like auth, HTTPS and CORS reflect the state at listing time and may change.

FAQ

Does PostcodeData.nl require an API key?

No — PostcodeData.nl is listed as a no-auth API, so you can call it directly.