How do I get an API key?

PostNL customers can request an API key through the business portal MijnPostNL (mijn.postnl.nl). In the portal, please go to My Account > Manage API's > select the correct customer number > follow the instructions to request the API key. After requesting the key, please wait a moment and refresh the page. If you are building the API(s) yourself (and not using a plugin solution) you will likely receive a sandbox key first. After succesful testing and confirmation from PostNL's Digitale Klant Support team you will be provided with a production key. Once generated, API keys are visible in the portal under My Account > Manage API's. If you are not a PostNL customer yet, there is an option to receive test credentials including a sandbox key via: https://developer.postnl.nl/request-api-key/. Please note that production keys are only provided to customers.