Security testing in Sandbox environments

Scheduled for Apr 22, 00:00 CEST  -  May 1, 00:00 CEST

Scheduled

As part of our ongoing commitment to protecting our customers and ensuring the reliability of our services, we will be carrying out controlled security testing on our APIs. These activities are conducted proactively to identify and address potential vulnerabilities, helping us maintain high security standards.

Schedule
The testing activities will take place from Wednesday, 22nd April through Wednesday, 30th April.

Scope
Sandbox environments for all API's documented on the PostNL developer portal are in scope of testing activities, except Track & Trace endpoints. The scope includes both existing API's (v2) and new future proof API's (v4) versions.

Potential impact on Sandbox environments
During this period, Sandbox environments may experience degraded performance, intermittent disruptions or unexpected behaviour as a result of the testing activities.

Production endpoints or live operations are not impacted.
Posted Apr 20, 2026 - 16:33 CEST