reikey

Install command: 
brew install --cask reikey

Name: ReiKey

Scans, detects, and monitors keyboard taps

https://objective-see.org/products/reikey.html

Development: Pull requests

Cask JSON API: /api/cask/reikey.json

Cask code: reikey.rb on GitHub

Current version: 1.4.2

Requirements: macOS >= 10.15

Analytics:

Installs (30 days)
reikey 73
Installs (90 days)
reikey 188
Installs (365 days)
reikey 619