Prepare your new development for opt-out APIs in the new CMS Starting 26 May 2025, IT developers can access a dedicated testing environment to perform opt-out in batch via APIs (formerly known as API A2A). As of 26 May 2025, IT developers will have access to a dedicated testing environment to perform opt-out in batch via APIs, previously referred to as API A2A. To prepare for the upcoming launch of the CMS APIs related to opt-outs, you are invited to register for access to the sandbox environment. To do so, please contact us via GLPI form and choose the type of enquiry "New CMS Testers". Upon registration you will receive the necessary instructions to begin your development and test it before the go live. Please note that this is a shared test environment. Opt-out actions performed in the sandbox will not affect your production data. The Court will share the final implementation guides for the opt-out APIs prior to the official launch of the new CMS.