This is a lightweight Express API hosted on Heroku that exposes endpoints which send notifications to the Hydrogen Slack based on the current state of Ethereum/the world.
It's a basic Express API: the setup logic is in app.js and endpoints are defined in routes/. The scheduling of calls is handled by scheduler.js.
/balance sends updates about the ether balance of a given Ethereum account.
/balance sends updates about current gas prices.
Typing /bot_health_check in Slack returns It's alive! if the API can be reached on Heroku.