A vague question generates similarly vague answers.
It would seem you have to contact the appropriate certifying authority for the operating system(s) in question, and/or the software company or companies whose products would be involved. Be prepared to pay for this in one form or another, either through membership, as a separate fee, or both.
Regards, Greg
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"The more I learn, the more ignorant I realize I am."
What in the heck are API threads?? My first impression was to buy, beg, borrow, or steal a pipe threading machine, with a die for the sized pipe you are threading, and going to work on it... no certification necessary.