How do keyword tools access googles keyword volume?

Hello, I am wondering how tools like moz, ahrefs, semrush, and longtail pro get access to the volumes for millions of keywords. Do they have a special deal where they are paying for this much access? Could a small town kid like me with no tools, apps, or money use the api like they do? -- --

How to check the volume of keywords?

Lets say i wanted to check the exact volume of like 100 million keywords. Is this possible with the google adwords api ? Isn't this how keyword tools like semrush, moz, ahrefs, etc work? They just use the google api? Can anyone use it or do i have to be a big company? I'm just a kid with no t

How much does google api access cost to use?

For example how much does semrush,ahrefs, or moz pay to access the google api for their keyword explorers? How much for 1 person who just wants to learn ? -- -- =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ Also find us on our blog and Google+: https://googleadsdeveloper.blogspot.com/ https

who is the api for?

is this only for business owners? or can any person use the api just for fun? google is about spreading knowledge right? -- -- =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ Also find us on our blog and Google+: https://googleadsdeveloper.blogspot.com/ https://plus.google.com/+GoogleAdsDevel