API General
General questions about our API's
- Should I think about implementing an API?
- What is an API?
- What API's should I implement?
- Why is my API call not working?
- At what frequency can I call the API's?
- Can I put multiple shipments in one API call?
- What is the shipment limit per API call?
- Do PostNL API's validate addresses?
- What value should I use for CollectionLocation (or BLS-code)?
- My shipment data appears not processed on PostNL end, why?
- How do I initiate a new shipping product implementation?
- Can I use the same API for different PostNL business units?
- Why am I receiving the error message “The user is not authorized for this operation based on the provided...” when submitting a call to any of the webservices?
- The product and/or service I wish to implement is not specified on your products page.
- Can I use my existing set of API keys for all my webshops?
- Are there any costs being charged in general for creating shipments I’ve submitted via the PostNL API?
- Is the API down?