Observer is a simple tool that checks whether public assets of companies in hackerone, bugcrowd, intigriti and yeswehack have changed, then pushes notifications to the discord webhook url provided. It works based on the https://github.com/Osb0rn3/bugbounty-targets repository.
The discordURL_VDP and discordURL_BBP variables inside the main.go file have to be given the correct discord webhook urls.