These are the docs for the API used in the OASA Telematics.
Most of the information was extracted from this [JS script] (http://telematics.oasa.gr/js/script.js) so if you want to help head over there first.
You can find the online docs [oasa-telematics-api.readthedocs.io] (http://oasa-telematics-api.readthedocs.io/en/latest/)
Before using the API for any product, please contact OASA in order to ask for permission or something.