Pagerduty
From wikinotes
A proprietary, but API-accessible alerting service, free up to 5 users.
Alerters exist for ios, android, chrome-extensions, etc.
Documentation
home https://www.pagerduty.com/ github go-pdagent (cli tools) https://github.com/PagerDuty/go-pdagent github go-pagerduty (api client) https://github.com/PagerDuty/go-pagerduty google-chrome notifier https://github.com/PagerDuty/chrome-notifier API examples, python https://github.com/PagerDuty/API_Python_Examples