To integrate with EACAT you must do it through the PCI.
The PCI is the Interadministrative Collaboration Platform and has a generic messaging for all the services of the AOC Consortium, therefore, you also need its documentation, which you can find here .
If you are not only interested in the simple submission, but have agreed with the AOC Consortium on a specific and more complex procedure, you will need the documentation available at the following link: https://github.com/ConsorciAOC/OVER
Once you have completed the integration in the Pre-production environment, you will have to fill in the docx (Test sets to be performed once registered in pre-production ) so that we can validate the correct integration and formalize the move to production.