The URLs of the synchronous and asynchronous fronts are:
| Service | Front | URL |
- Tax Agency (AEAT)
- General Directorate of Cadastre
- Directorate General of Police (DGP)
- National Institute of Statistics (INE)
- National Employment Institute (INEM)
- Ministry of Education, Culture and Sport (ME) - Consultation of official qualifications
- General Treasury of the Social Security (TGSS)
- Directorate General of Traffic (DGT) - Telematic Accreditation of the Municipal Vehicle Tax (ATMV)
- Directorate General of Traffic (DGT) - consultation of information associated with vehicles and people of the ATEX service (Telematic Access for External Users)
- Directorate General of Traffic (DGT) - vehicle consultation
| Synchronous | https://serveis3.iop.aoc.cat/siri-proxy/services/Sincron |
| Asynchronous | https://serveis3.iop.aoc.cat/siri-proxy/services/Asincron |
| Asynchronous-response | https://serveis3.iop.aoc.cat/siri-proxy/services/AsincronResposta |