GoWatch

A change detection server that can notify through various services, written in Go
Some out-of-the-box highlights:

• Create watches by connecting filters in a DAG
• A small runtime footprint, a basic instance uses around 20MB of memory
• Supports Lua scripting to filter/modify/reduce your data any way you want
• Send notifications through Discord, Matrix, Slack, Telegram and many more services
• Disable watches on (repeated) failures

A Watch in GoWatch is made by connecting Filters together:

Stored data is plotted for the user:

Much more information can be found on the Github page of GoWatch.