ip-in-menu-bar

Install command: 
brew install --cask ip-in-menu-bar

Name: IP in menu bar

Shows current IP address in menu bar

https://www.monkeybreadsoftware.de/Software/IPinmenubar.shtml

Cask JSON API: /api/cask/ip-in-menu-bar.json

Cask code: ip-in-menu-bar.rb on GitHub

Current version: 4.7.1

Requirements: macOS >= 10.15

Analytics:

Installs (30 days)
ip-in-menu-bar 58
Installs (90 days)
ip-in-menu-bar 100
Installs (365 days)
ip-in-menu-bar 247