Example (scenario 1)
Request
{
"PostalCode": "1507TN",
"City": "",
"Street": "",
"HouseNumber": "6",
"Addition": ""
}
Documentation
Adrescheck Nationaal
Summary
Use this API to validate and enrich the Dutch address data that is entered in your webshop or CRM. Validations can be done with either combination of input: PostalCode+HouseNumber or City+Street+Housenumber. When using City+Street+HouseNumber, we use ‘approximate string matching’ also known as ‘Fuzzy search’. Therefore, typo's are allowed.
Method
| Method
| Endpoint
|
| Post | https://api.postnl.nl/address/national/v1/validate |
Required headers
| Key | Value |
| Content-Type | Application/json |
| apikey | <your apikey> |
Input parameters
| Fieldname | Mandatory/optional | Format | Example |
| PostalCode | Mandatory | String [6] | 1234AB |
| HouseNumber | Mandatory | String or Number [1-5] | 123 (only numerical values allowed) |
| Addition | Optional | String [6] | A / a / a2 |
Or
| Fieldname | Mandatory/optional | Format | Example |
| City | Mandatory | String [1-35] | Amsterdam |
| Street | Mandatory | String [1-95] | Dam |
| Housenumber | Mandatory | String or number [1-5] | 123 (only numerical values allowed) |
| Addition | Optional | String [6] | A / a / a2 |
Output parameters
| Fieldname | Description of attribute | Format [length] |
| City | City of requested address | String [1-35] |
| PostalCode | Postalcode of requested address | String [6] |
| Street | Street of requested address | String [1-95] |
| HouseNumber | Housenumber of requested address | Number [1-5] |
| Addition | Housenumber addition of requested address if applicable | String [6] or null |
| FormattedAddress | Full formatted address according to PostNL standard | Array wiirh 2 strings |
Response
[
{
"City": "ZAANDAM",
"PostalCode": "1507TN",
"Street": "Wals",
"HouseNumber": 6,
"FormattedAddress": [
"Wals 6 ",
"1507TN ZAANDAM"
]
}
]
Possible error codes
Error code | Error message |
200 | JSON response with requested data. |
4xx | Address not found. Example:
Error on customer-side. Example: { 'errors': [ { 'status': '400', 'title': 'Bad Request', 'detail': "PostalCode has the wrong format. It should be: 1234AB" } ] } |
5xx | Error on PostNL side. |