IT map / EU links
Sistema Técnico «Só Uma Vez» (Once-Only Technical System, OOTS)
Single Digital Gateway system for automated cross-border exchange of evidence between competent authorities at the user's request.
- Acronym
- OOTS
- Type
- EU system
- Level
- EU
- Area
- EU links
- Owner
- Comissão Europeia
- Used by
- citizens, businesses, public staff
- In service since
- 2023
- Evidence
- Checked against sources
- Interface types
- AS4 / eDelivery, REST API
- Login and identity links
- 1, counted but not listed
- Would the model apply?
- Not yet analysed
Connections
5 documented links. Select any entry to open its page.
Exchanges with (EU)3
- Agência para a Reforma Tecnológica do Estado, I.P.ARTE coordinates PT adhesion to OOTS and publishes evidence requester/provider manuals · Message queue
- Instituto para o Ensino Superior, I.P.DGES (merged into IES under DL 109/2025) became an OOTS evidence provider for academic qualifications in Oct 2025 · Message queue
- Plataforma Digital Única (Single Digital Gateway / Your Europe)OOTS implements the SDG once-only obligation
Run by1
- Comissão EuropeiaProvides OOTS common services and technical design documents
Connected from1
- Agência para a Reforma Tecnológica do Estado, I.P.ARTE is Portugal's Single Digital Gateway national coordinator
What the owner signs for IT
The owner is an EU or international body, so it does not appear in Portal BASE, which covers Portuguese public contracts.
Sources
- digital.gov.pt/en/noticias/portugal-e-o-principio-so-uma-vez-na-uniao-europeia
- ec.europa.eu/digital-building-blocks/sites/display/OOTS/The+Once-Only+view+from+Portugal
- rtp.pt/noticias/pais/marcelo-promulga-criacao-do-instituto-para-o-ensino-superior_n1684817
- mosaico.gov.pt/plataformas-comuns/once-only-technical-system
- github.com/amagovpt/OOTS