ServicesOnce-Only Technical
System services
To enable the exchange of evidences between Data Services and Online Procedure Portals and comprehensive support while developing and integrating the system, the Once-Only Technical System includes Once-Only common services and additional supporting services.
Common services
The Commission provides Common Services to help EU Member States ensure the proper exchange of evidences through the Once-Only Technical System. The Common Services do not process data about citizens or businesses. Instead, they contain and serve operational data parameters that support the operation of the Once-Only technical system.
Input data into the Common services tool
Helps you manage your Member State procedures, requirements, evidence types, evidence providers and data services through the application.
Manage user roles and accesses to the tool
The user management tool allows Member State User Managers (National coordinators) to add, manage and remove users from the Common Services Administration Tool.
APIs to query common services
The Common Services provide machine-to-machine REST APIs for querying. For look-ups, all common services shall implement the REST APIs introduced in this section.
Common services in 2 minutes
Watch the video explaining the Common services.
Testing service
This Testing service assists national teams in implementing the Once-Only Technical System. Information on available testing services, including the test platform and other tools to facilitate testing are available on a restricted wiki space.
If required, please request access to the restricted wiki via the Service Desk.
Service desk
This service desk helps users improve the performance, continuity and reliability of their Once-Only Technical System implementations.
Contact the service desk for support with OOTS-related technical issues and access requests. The service desk will also coordinate the resolution of eDelivery and EU-Login issues.
Evidence Explorer
The Evidence explorer shows published data in the Common Services and helps competent authorities see:
- The procedural requirements each Member States have defined for each procedure
- The full list of procedural requirements so they can determine if they issue relevant evidences
- The list of evidence providers that are ready to exchange evidence
Service agreements
The Once-Only Technical System service desk Service offering description (SOD) provides a comprehensive overview of the service, how you can use it and how it is organised.
The Once-Only Technical System service desk Service level arrangement (SLA) is a statement of the intentions of the Commission within the specific context of Digital Europe Programme (DEP) work programmes and applies to the software and services provided by the Once-Only Technical System Common Services. It aims to specify how the software and services are provided as well as the expected level of service.
Once-Only Technical System - Service Desk - Service Offering Description (SOD)
Once-Only Technical System - Service Desk - Service Offering Description (SOD)
Once-Only Technical System - Service Desk - Service Level Arrangement (SLA)
OOTS Common Services - Query Services - Service Level Arrangement (SLA)
OOTS Common Services - User Management Application - Service Level Arrangement (SLA)
Not sure where to start with inputting your data in the Common Services?
Visit the Common services "How-To" guide to understand the different components of the Common Services, what your role is as an Evidence Provider or Requester, and the key tasks associated with your role.