450K+ Dutch postcodes, complete data
Every Dutch postcode with street, city, municipality, province, coordinates and area codes. One call returns everything your app needs.
See data fields → Dutch Postcode API
Every Dutch address
in one API
Sub-50ms responses. 450K+ postcodes. Street, city, coordinates - one call. The most complete Dutch address data, built for the modern web.
★★★★★ Trusted by developers
450K+ Dutch Postcodes
99.99% Uptime
<50ms Avg Response
25 Free Lookups to Start
Full Coverage
Complete dataset of all Dutch postcodes. City, municipality, province, coordinates and area codes.
Browse fieldsLightning Fast
Sub-50ms response times. Optimized infrastructure ensures minimal latency for every request.
Learn moreSimple Pricing
Pay per lookup with transparent credit packages. No subscriptions, no hidden fees.
View packagesDeveloper Friendly
Clean REST API with comprehensive documentation. Bearer token auth, JSON responses, instant setup.
View docsTry It Out ›
Search postcodes, cities, or look up a street by postcode + house number - no signup required
Built for developers
Clean REST API, Bearer token auth, JSON responses. Comprehensive docs with cURL and Python examples. Integrate in minutes, not days.
Read the docs →API Endpoints ›
6 endpoints to cover every lookup use case
/api/postcode/search
Full postcode search
Method GET
Response <50ms
/api/postcode/autocomplete
Real-time suggestions
Method GET
Response <30ms
/api/address/lookup
Postcode + house number
Method GET
Returns Street + City
/api/test/search TEST
Dummy search, no credits
Method GET
Auth None
/api/test/autocomplete TEST
Dummy autocomplete, no credits
Method GET
Auth None
/api/test/address TEST
Dummy address lookup, no credits
Method GET
Auth None
Response Preview ›
Clean JSON responses with all the data you need
GET /api/postcode/search?q=1012
{"results": [
{
"postcode": 1234,
"woonplaats": "Voorbeeld",
"gemeente": "Voorbeeld",
"provincie": "Noord-Holland",
"latitude": 52.3676,
"longitude": 4.9041,
"netnummer": "020"
}
]} GET /api/address/lookup?postcode=1234AB&number=1
{"address": {
"postcode": "1234AB",
"huisnummer": 1,
"straatnaam": "Voorbeeldstraat",
"woonplaats": "Voorbeeld",
"gemeente": "Voorbeeld",
"provincie": "Noord-Holland",
"latitude": 52.0,
"longitude": 5.0
}}Create Account
Sign up for free and get 25 lookups instantly. No credit card needed.
Get API Key
Generate a Bearer token from your dashboard. Use it in every API request.
Start Querying
Call the API from any language. Get results in milliseconds.
What teams use it for
Illustrative scenarios, not customer quotes.
Checkout and billing addresses
Validate and complete Dutch addresses where customers enter shipping or invoice details. Fits flows that need low latency and credit-based billing without long-term contracts.
Web forms and portals
Autocomplete postcodes and streets in sign-up, lead, or service request forms so downstream systems receive consistent Dutch address records.
Scripts and back-office tools
Call the same REST API from scripts, admin panels, or data jobs for batch lookups, validation, and operational workflows alongside customer-facing apps.
How We Compare
Postcode API vs. other Dutch address providers
| Feature | Postcode API | postcodeapi.nu | postcode.eu | Kadaster API |
|---|---|---|---|---|
| Free tier | 25 lookups | No | No | No |
| Credit-based pricing | Yes | Yes | Yes | No |
| Avg. response time | <50ms | ~200ms | ~150ms | ~300ms |
| Uptime | 99.99% | ~99.9% | ~99.9% | ~99% |
| No annual contracts | Yes | No | Yes | No |
| Dutch support | Yes | Yes | No | No |
| REST API + docs | Yes | Yes | Yes | Yes |
Developer Tools ›
Everything you need to integrate and test the API
API Tester
Try endpoints with your own API key
Dashboard
Credits, usage charts, API keys
API Tester DEV
GET
Query params
User Dashboard ›
See what your dashboard looks like - credits, usage charts, API keys, and more
Dashboard preview
Welcome back, Thomas
Your Postcode API dashboard
Credits Remaining
73.842
74% of 100.000
Total Lookups
2.847.392
All time
API Keys
6
Manage keys
Rate Limit
1.500
requests/min
API Usage 22.440 lookups
Last 14 days Actual Predicted (30d trend) 62.6k/mo
2.1k1.4k7000
5/36/37/38/39/310/311/312/313/314/315/316/317/318/3
Package Enterprise
Credits
73.842 / 100.000
Lookups 2.847.392
API Keys 6
Rate Limit 1.500/min
One integration, every Dutch address
Drop in a single API call and your app resolves any Dutch postcode to a full address. No CSV imports, no stale datasets, no maintenance on your side.
Get your API key →
Faster checkout flows, higher conversion
Validate and complete Dutch addresses where customers enter shipping or invoice details. Fits flows that need low latency and credit-based billing without long-term contracts.
Start for free →Start building today
Create a free account and get 25 lookups instantly. No credit card required.