The bol.com API uses a throttling mechanism to limit the amount of calls an API-user can make. This mechanism reduces the strain on our backend systems, as well as prevents multiple users to compete for resources. This will result in less downtime and error responses.
We have a limit on the API calls of 1200 requests per hour.
What if I hit a limit
When the amount of requests exceeds your limit, the API lets you know by giving a HTTP response code 503, and returns the following error message: Please reduce your request rate. If this occurs, you’ll have to wait until you regain your requests the next day. Fortunately, this should not occur, or rarely occur. If this does occur regularly, please contact your API administrator to discuss your throttling profile.