website-watchman

Install command: 
brew install --cask website-watchman

Name: Website Watchman

Monitor a whole website, part of a website or a single page

https://peacockmedia.software/mac/watchman/

Cask JSON API: /api/cask/website-watchman.json

Cask code: website-watchman.rb on GitHub

Current version: 3.3.2

Requirements: macOS >= 10.15

Analytics:

Installs (30 days)
website-watchman 6
Installs (90 days)
website-watchman 23
Installs (365 days)
website-watchman 76