Have a small thing I need help with.

I need to take the information on this site:
http://bitclockers.com/api.json

I need to make that information into a new website where:
If "activeworkers" is over 500 I want the same information displayed, but  "activeworkers" should be 100
If "activeworkers" is less than 500 I want the same information displayed, but  "activeworkers" should be 1000000

This information needs to be updated every minute.
If anyone can help, please PM.