The Merit Aktiva API has a two points of entry. The URL depends which localization the company is using:
V1
For Estonian localization: https://aktiva.merit.ee/api/v1/
For Polish localization: https://program.360ksiegowosc.pl/api/v1/
V2
For Estonian localization: https://aktiva.merit.ee/api/v2/
For Polish localization: https://program.360ksiegowosc.pl/api/v2/
Please note the use of https:// in the URL above. All Merit Aktiva API communication is encrypted over HTTPS. Any non-secure requests are automatically rejected.