The EC2 discovery plugin provides a list of seed addresses to the [discovery process](docs-content://deploy-manage/distributed-architecture/discovery-cluster-formation/discovery-hosts-providers.md) by querying the [AWS API](https://github.com/aws/aws-sdk-java) for a list of EC2 instances matching certain criteria determined by the [plugin settings](/reference/elasticsearch-plugins/discovery-ec2-usage.md).
You can download this plugin for [offline install](/reference/elasticsearch-plugins/plugin-management-custom-url.md) from [https://artifacts.elastic.co/downloads/elasticsearch-plugins/discovery-ec2/discovery-ec2-{{version}}.zip](https://artifacts.elastic.co/downloads/elasticsearch-plugins/discovery-ec2/discovery-ec2-{{version}}.zip). To verify the `.zip` file, use the [SHA hash](https://artifacts.elastic.co/downloads/elasticsearch-plugins/discovery-ec2/discovery-ec2-{{version}}.zip.sha512) or [ASC key](https://artifacts.elastic.co/downloads/elasticsearch-plugins/discovery-ec2/discovery-ec2-{{version}}.zip.asc).