RubyでSlackにメッセージ送る方法(slack-poster使う) Refer https://github.com/rikas/slack-poster http://sho.tdiary.net/20160112.html https://slack.com How To $ gem install slack-poster $ open https://TEAM-NAME.slack.com/services/new/incoming-webhook Click “Add Incoming WebHooks Integration” Copy “Webhook URL” “Webhook URL” looks like: https://hooks.slack.com/services/XXXXXXXXX/XXXXXXXXX/XXXXXXXXXXXXXXXXXXXXXXXX.