AEMP API implementation

I need the API Documentation of each manufacturer with endpoints and test logins to do it.
I guess only a owner of each machinery can get it.

Yes you are right  but it seems that some access are very low  so the total cost will be not so hight but we have to investigate

I want to access directly to each manufacturer API just like trackunit does, I dont want to pass over AEMP.org API nor pay their membership.
It suppose that each manufacturer platform conforms to the ISO/TS 15143-3:2016 standart or I get it wrong?

No, you're wrong. The communication protocol of tracking  device and server of manufacturer it's not the same as API to get data from the server via API.
API (like AEMP) is just some type of sharing data from manufacturer's server like getting data from Wialon wia SDK or Retranslator.
We don't know heavy mashines/trucks manufacturers who shares the protocol of their embedded tracking devices.
If you find some well-known manufacturer (like Volvo, Cat, John Deere, etc.) who is ready to share the communication protocol between embedded tracking device and platform please notify hw@gurtam.com We'll implement it in Wialon ASAP.

According to our experience, monthly fee of such platforms much more than Wialon or other third-part platforms (from hundreeds to thousands dollars per unit per year). For example, one of the agricultural manufacturer's fee is 300-700 Euro per unit per year (depending on the quantity of parameters).
Also the data quality of such system (GPS points quantity, fuel level accuracy, etc) is MUCH lower than using third-part tracking devices with LLS and Wialon.