Use DescribeParameters with an Amazon SDK or CLI

Example 1: To list all parameters

The following describe-parameters example lists all parameters in the current Amazon account and Region.

aws ssm describe-parameters

Output:

{
    "Parameters": [
        {
            "Name": "MySecureStringParameter",
            "Type": "SecureString",
            "KeyId": "alias/aws/ssm",
            "LastModifiedDate": 1582155479.205,
            "LastModifiedUser": "arn:aws:sts::111222333444:assumed-role/Admin/Richard-Roe-Managed",
            "Description": "This is a SecureString parameter",
            "Version": 2,
            "Tier": "Advanced",
            "Policies": [
                {
                    "PolicyText": "{\"Type\":\"Expiration\",\"Version\":\"1.0\",\"Attributes\":{\"Timestamp\":\"2020-07-07T22:30:00Z\"}}",
                    "PolicyType": "Expiration",
                    "PolicyStatus": "Pending"
                },
                {
                    "PolicyText": "{\"Type\":\"ExpirationNotification\",\"Version\":\"1.0\",\"Attributes\":{\"Before\":\"12\",\"Unit\":\"Hours\"}}",
                    "PolicyType": "ExpirationNotification",
                    "PolicyStatus": "Pending"
                }
            ]
        },
        {
            "Name": "MyStringListParameter",
            "Type": "StringList",
            "LastModifiedDate": 1582154764.222,
            "LastModifiedUser": "arn:aws:iam::111222333444:user/Mary-Major",
            "Description": "This is a StringList parameter",
            "Version": 1,
            "Tier": "Standard",
            "Policies": []
        },
        {
            "Name": "MyStringParameter",
            "Type": "String",
            "LastModifiedDate": 1582154711.976,
            "LastModifiedUser": "arn:aws:iam::111222333444:user/Alejandro-Rosalez",
            "Description": "This is a String parameter",
            "Version": 1,
            "Tier": "Standard",
            "Policies": []
        },
        {
            "Name": "latestAmi",
            "Type": "String",
            "LastModifiedDate": 1580862415.521,
            "LastModifiedUser": "arn:aws:sts::111222333444:assumed-role/lambda-ssm-role/Automation-UpdateSSM-Param",
            "Version": 3,
            "Tier": "Standard",
            "Policies": []
        }
    ]
}

Example 2: To list all parameters matching specific metadata

This describe-parameters example lists all parameters matching a filter.

aws ssm describe-parameters --filters "Key=Type,Values=StringList"

Output:

{
    "Parameters": [
        {
            "Name": "MyStringListParameter",
            "Type": "StringList",
            "LastModifiedDate": 1582154764.222,
            "LastModifiedUser": "arn:aws:iam::111222333444:user/Mary-Major",
            "Description": "This is a StringList parameter",
            "Version": 1,
            "Tier": "Standard",
            "Policies": []
        }
    ]
}

For more information, see Searching for Systems Manager Parameters in the Amazon Systems Manager User Guide.

import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.ssm.SsmClient;
import software.amazon.awssdk.services.ssm.model.GetParameterRequest;
import software.amazon.awssdk.services.ssm.model.GetParameterResponse;
import software.amazon.awssdk.services.ssm.model.SsmException;

/**
 * Before running this Java V2 code example, set up your development
 * environment, including your credentials.
 *
 * For more information, see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 */
public class GetParameter {
    public static void main(String[] args) {
        final String usage = """

                Usage:
                    <paraName>

                Where:
                    paraName - The name of the parameter.
                """;

        if (args.length != 1) {
            System.out.println(usage);
            System.exit(1);
        }

        String paraName = args[0];
        Region region = Region.US_EAST_1;
        SsmClient ssmClient = SsmClient.builder()
                .region(region)
                .build();

        getParaValue(ssmClient, paraName);
        ssmClient.close();
    }

    public static void getParaValue(SsmClient ssmClient, String paraName) {
        try {
            GetParameterRequest parameterRequest = GetParameterRequest.builder()
                    .name(paraName)
                    .build();

            GetParameterResponse parameterResponse = ssmClient.getParameter(parameterRequest);
            System.out.println("The parameter value is " + parameterResponse.parameter().value());

        } catch (SsmException e) {
            System.err.println(e.getMessage());
            System.exit(1);
        }
    }
}

Example 1: This example lists all parameters.

Get-SSMParameterList

Output:

Description      :
KeyId            :
LastModifiedDate : 3/3/2017 6:58:23 PM
LastModifiedUser : arn:aws:iam::123456789012:user/admin
Name             : Welcome
Type             : String

async fn show_parameters(client: &Client) -> Result<(), Error> {
    let resp = client.describe_parameters().send().await?;

    for param in resp.parameters() {
        println!("  {}", param.name().unwrap_or_default());
    }

    Ok(())
}