The Market Operator informs market participants that updated XSD and WSDL templates have been published on the OTE website: XSD, WSDL, OTE public web services — English

The updated XSD and WSDL templates will be deployed to the CS OTE production environment during an extraordinary maintenance outage of the CS OTE system on 28 July 2026.

At the same time, the Market Operator once again encourages all affected market participants who will be involved, in any role, in the newly implemented processes related to flexibility aggregation, energy storage, and all associated activities (including registration of aggregator changes, assignment of aggregator balance responsible parties (BRPs), exchange of information on flexibility activation or electricity storage facilities, submission of data for the settlement of storage and flexibility, etc.) to participate in testing these functionalities in the Sandbox testing environment.