About GitHub Apps
GitHub Apps are tools that extend GitHub's functionality. GitHub Apps can do things on GitHub like open issues, comment on pull requests, and manage projects. They can also do things outside of GitHub based on events that happen on GitHub. For example, a GitHub App can post on Slack when an issue is opened on GitHub.
Finding GitHub Apps
You can discover GitHub Apps on GitHub Marketplace.
Note
Apps from GitHub Marketplace are not currently available on GHE.com.
You can also build your own GitHub App. For more information, see About creating GitHub Apps.
Using GitHub Apps
In order to use a GitHub App, you must install the app on your user or organization account. When you install the app, you grant the app permission to read or modify your repository and organization data. The specific permissions depends on the app, and GitHub will tell you what permissions the app requested before you install the app. When you install the app, you will also specify what repositories the app can access. If the app requires any additional configuration, the app will direct you to do so. For more information, see Installing a GitHub App from GitHub Marketplace for your personal account, Installing a GitHub App from GitHub Marketplace for your organizations, Installing a GitHub App from a third party and Installing your own GitHub App.
You may also need to authorize a GitHub App to verify your identity, know what resources you can access, or take actions on your behalf. If you need to authorize the app, the app will prompt you to do so. For more information, see