Many online documents available here:
https://www.mazdausa.com/owners/how-to-use-my-mazda?year=2017&mc=17CX5
I believe it is too soon for this sort of stuff to be available online considering the the CX-5 has just been released.
Only manual online currently is owners manual.
They are all available but you have to subscribe. There are technical descriptions and there is the very detailed workshop manual. Examples attached.
I think this is the US site/link:
https://www.mazdaserviceinfo.com/
"Subscriptions as low as $19.95."
The intent is to provide independent repair facilities with the needed information to repair Mazda vehicles. So as Anchroman suggests, you will likely need to provide some proof of affiliation with the auto industry.
You don't have to prove any affiliation. Anyone can sign up for an account and get access to all the manuals. I've done it once, but that $20 fee is for 24 hours of access, so it's pretty steep (a month is $200 and a year is $1,500). Plus, I tried but failed to find a way to PDF everything into one manual as had been posted in the past, instead you could only view individual sub category instructions.
If anyone has figured out how to PDF everything that would be much appreciated.
Print to PDF
Then use a online PDF combiner
(scratch)
The full service manual just for body and accessories is over 2000 pages, to print to PDF 2-3 pages at a time would take forever. Maybe Anchorman can chime in if there is a way to combine the full manual into one file?