Heroku Scaler

HEROKU_TOKEN=token-here APP_NAME=name-here npm start on to scale up your free dyno.

HEROKU_TOKEN=token-here APP_NAME=name-here npm start off to scale down your free dyno.

To run from Heroku Scheduler, first npm install --save heroku-scaler and deploy to Heroku. Then, in Scheduler, schedule the command HEROKU_TOKEN=token-here APP_NAME=name-here node ./node_modules/heroku-scaler/bin/heroku-scaler.js on (or off). Alternatively, set the environment variables beforehand, and just use node ./node_modules/heroku-scaler/bin/heroku-scaler.js on or node ./node_modules/heroku-scaler/bin/heroku-scaler.js off.

In your app's package.json, you can add these tasks to the scripts field for even simpler execution.

{
  "scripts": {
    "heroku-on": "node ./node_modules/heroku-scaler/bin/heroku-scaler.js on",
    "heroku-off": "node ./node_modules/heroku-scaler/bin/heroku-scaler.js off"
  }
}

npm run-script heroku-on and npm run-script heroku-off should now work.