gfxcardstatus

Install command: 
brew install --cask gfxcardstatus

Name: gfxCardStatus

https://gfx.io/

/api/cask/gfxcardstatus.json (JSON API)

Cask code on GitHub

Current version: 2.5,5482

Analytics:

Installs (30 days)
gfxcardstatus 24
Installs (90 days)
gfxcardstatus 94
Installs (365 days)
gfxcardstatus 533
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