The API is one way.
However, there's a much easier way:
Go to Systems Manager > Software.
Here you'll find all the software installed across every device
In the search, type System which will bring up Systems Manager, devices and versions
![Screen Shot 2021-05-19 at 11.36.23 AM.png Screen Shot 2021-05-19 at 11.36.23 AM.png](https://community.meraki.com/t5/image/serverpage/image-id/18158i53F07EB5541F5363/image-size/medium?v=v2&px=400)
Click CSV and open...
![Screen Shot 2021-05-19 at 11.37.06 AM.png Screen Shot 2021-05-19 at 11.37.06 AM.png](https://community.meraki.com/t5/image/serverpage/image-id/18159iE9A0C8C0A4913F80/image-size/medium?v=v2&px=400)