PostNL Address Validation API
PostNL Address Validation API: A focused API for international address validation, correction and ecommerce checkout support. Ranked #19 of 30 in Address Verification Software by our editors (7.6/10); pricing: Free plan; best for international validation for ecommerce addresses.
At a glance
- Editor score7.6 / 10
- PricingFree plan
- Best forInternational validation for ecommerce addresses
- Free planYes
- API accessYes
- Facts checked20 Sep 2026
Where it wins
- Validates and enriches addresses across more than 240 countries and regions
- Corrects mismatched city, street and postal-code data
- Integrates with Magento, WooCommerce, ShopWare and Opencart
Where it doesn't
- Free access applies to PostNL parcel-contract customers
- The free parcel-contract plan applies to Benelux addresses
- International validation uses bundle-based purchasing
Our verdict on PostNL Address Validation API
PostNL Address Validation API is built for webshops and CRM systems that need to validate, correct and enrich postal address data. Its POST API accepts international address fields and returns matched address details, including postal code, city, country, coordinates and mailability scoring. Autocomplete suggestions support checkout forms by helping customers find matching addresses while they type. The service is suited to ecommerce teams and developers that need address handling across international markets through web and API access.
Its main strength is the breadth of address processing in one service. PostNL supports addresses in more than 240 countries and regions, with local or national formatting standards, address matching, enrichment and correction for mismatched city, street or postal-code data. Responses can include country, locality, state, company and building information, as well as latitude and longitude for matched addresses. Mailability and result-percentage scoring add a way to assess returned results before downstream fulfillment or CRM use.
The published plans show a freemium model with two relevant paths. PostNL parcel-contract customers receive the parcel-contract address check for free, covering Benelux addresses. International validation is available through bundle-based purchasing. Ecommerce teams can connect the service with Magento, WooCommerce, ShopWare or Opencart, making it a practical fit for supported storefront ecosystems. Choose it when international coverage, correction, formatting and autocomplete matter more than a narrow domestic workflow. Organizations needing batch validation should evaluate their requirements carefully, while teams outside the supported ecommerce integrations may need additional development around the API.
PostNL Address Validation API pricing
All 2 PostNL Address Validation API plans and prices →
PostNL Address Validation API fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Not verified |
| API access | Yes |
| Batch validation | Not verified |
| Address correction | Yes |
| Address standardization | Yes |
| Address autocomplete | Yes |
| International coverage | Global |
| Deployment | Cloud |
| Platforms | Web |
| Support | Email, Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 4 integrations: Magento, WooCommerce, ShopWare, Opencart |
| Pricing | Free plan (source) |
| Website | developer.postnl.nl |
| Facts checked | 20 Sep 2026 |
PostNL Address Validation API integrations
PostNL Address Validation API lists 4 integrations on its own site.
- Magento
- WooCommerce
- ShopWare
- Opencart
Alternatives to PostNL Address Validation API
- Smarty Address VerificationA broad address data toolkit with strong API, batch, correction, and global coverage.9.4
- PostGrid Address VerificationA capable global validator for teams that need integrations and flexible workflows.9.3
- Loqate Address VerificationA broad address-data quality platform for enterprise validation, enrichment and batch workflows.9.2
See all PostNL Address Validation API alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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