CDS API Rate Limiting Document

There have been a number of questions raised in recent trade sessions querying HMRC’s use of API rate limiting.


The CDS API rate limiting strategy document summarises the standard mechanism in place (and the reason for it) and describes how that approach is being adapted to meet the specific needs of CDS.

The attached document will also be available on Google Drive in the following folder - CDS 03 Customs Declaration.

If you have questions or feedback about this document, please contact the Software Development Support Team (

Back to news

We use cookies on this site to improve your experience. By continuing to browse the site you are agreeing to our use of cookies. You will only see this message once. Find out more