| heroku_api_key | This will be used for authentication. You can find it in your heroku homepage account settings | yes | — |
| heroku_email | Email that you use with heroku | yes | — |
| heroku_app_name | The appname to use for deploying/updating | yes | — |
| buildpack | An optional buildpack to use when creating the heroku application | no | — |
| branch | The branch that you would like to deploy to Heroku | no | HEAD |
| dontuseforce | Set this to true if you don't want to use --force when switching branches | no | false |
| dontautocreate | Set this to true if you don't want to automatically create the Heroku app | no | false |
| usedocker | Will deploy using Dockerfile in project root. | no | false |
| docker_heroku_process_type | Type of heroku process (web, worker, etc). This option only makes sense when usedocker enabled | no | web |
| docker_build_args | A list of args to pass into the Docker build. This option only makes sense when usedocker enabled | no | — |
| appdir | Set if your app is located in a subdirectory. | no | "" |
| healthcheck | A URL to which a healthcheck is performed (checks for 200 request) | no | "" |
| checkstring | Value to check for when conducting healthcheck request | no | "" |
| delay | Time (in seconds) to wait before performing healthcheck | no | 0 |
| procfile | Contents of the Procfile to save and deploy | no | "" |
| rollbackonhealthcheckfailed | When set to true this will attempt to rollback to the previous release if the healthcheck fails | no | false |
| env_file | Path to an localized env file | no | "" |
| justlogin | Set to true if you want the action to just login to Heroku and nothing else | no | false |
| region | The region in which you would like to deploy a server | no | "" |
| stack | Set stack of your heroku app if you need to change.Default : heroku-20 | no | "" |
| team | If deploying to an organization, then specify the name of the team or organization here | no | "" |
| addons | Specify addons to be set (valid for review apps) | no | "" |
| buildpacks | Specify buildpacks to be set (valid for review apps) | no | "" |
| formation | Dyno scaling (valid for review apps) | no | "" |
| postdeploy | Run postdeploy script (valid for review apps) | no | "" |
| env_variables | Specify custom env variables (valid for review apps) | no | "" |