Use ListBuckets with an Amazon SDK or command line tool

namespace ListBucketsExample
{
    using System;
    using System.Collections.Generic;
    using System.Threading.Tasks;
    using Amazon.S3;
    using Amazon.S3.Model;

    /// <summary>
    /// This example uses the AWS SDK for .NET to list the Amazon Simple Storage
    /// Service (Amazon S3) buckets belonging to the default account.
    /// </summary>
    public class ListBuckets
    {
        private static IAmazonS3 _s3Client;

        /// <summary>
        /// Get a list of the buckets owned by the default user.
        /// </summary>
        /// <param name="client">An initialized Amazon S3 client object.</param>
        /// <returns>The response from the ListingBuckets call that contains a
        /// list of the buckets owned by the default user.</returns>
        public static async Task<ListBucketsResponse> GetBuckets(IAmazonS3 client)
        {
            return await client.ListBucketsAsync();
        }

        /// <summary>
        /// This method lists the name and creation date for the buckets in
        /// the passed List of S3 buckets.
        /// </summary>
        /// <param name="bucketList">A List of S3 bucket objects.</param>
        public static void DisplayBucketList(List<S3Bucket> bucketList)
        {
            bucketList
                .ForEach(b => Console.WriteLine($"Bucket name: {b.BucketName}, created on: {b.CreationDate}"));
        }

        public static async Task Main()
        {
            // The client uses the AWS Region of the default user.
            // If the Region where the buckets were created is different,
            // pass the Region to the client constructor. For example:
            // _s3Client = new AmazonS3Client(RegionEndpoint.USEast1);
            _s3Client = new AmazonS3Client();
            var response = await GetBuckets(_s3Client);
            DisplayBucketList(response.Buckets);
        }
    }
}

bool AwsDoc::S3::ListBuckets(const Aws::Client::ClientConfiguration &clientConfig) {
    Aws::S3::S3Client client(clientConfig);

    auto outcome = client.ListBuckets();

    bool result = true;
    if (!outcome.IsSuccess()) {
        std::cerr << "Failed with error: " << outcome.GetError() << std::endl;
        result = false;
    }
    else {
        std::cout << "Found " << outcome.GetResult().GetBuckets().size() << " buckets\n";
        for (auto &&b: outcome.GetResult().GetBuckets()) {
            std::cout << b.GetName() << std::endl;
        }
    }

    return result;
}

The following command uses the list-buckets command to display the names of all your Amazon S3 buckets (across all regions):

aws s3api list-buckets --query "Buckets[].Name"

The query option filters the output of list-buckets down to only the bucket names.

For more information about buckets, see Working with Amazon S3 Buckets in the Amazon S3 Developer Guide.

// BucketBasics encapsulates the Amazon Simple Storage Service (Amazon S3) actions
// used in the examples.
// It contains S3Client, an Amazon S3 service client that is used to perform bucket
// and object actions.
type BucketBasics struct {
	S3Client *s3.Client
}



// ListBuckets lists the buckets in the current account.
func (basics BucketBasics) ListBuckets() ([]types.Bucket, error) {
	result, err := basics.S3Client.ListBuckets(context.TODO(), &s3.ListBucketsInput{})
	var buckets []types.Bucket
	if err != nil {
		log.Printf("Couldn't list buckets for your account. Here's why: %v\n", err)
	} else {
		buckets = result.Buckets
	}
	return buckets, err
}

import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.s3.S3Client;
import software.amazon.awssdk.services.s3.model.Bucket;
import software.amazon.awssdk.services.s3.model.ListBucketsResponse;
import java.util.List;

/**
 * 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 ListBuckets {
    public static void main(String[] args) {
        Region region = Region.US_EAST_1;
        S3Client s3 = S3Client.builder()
            .region(region)
            .build();

        listAllBuckets(s3);

    }
    public static void listAllBuckets(S3Client s3) {
        ListBucketsResponse response = s3.listBuckets();
        List<Bucket> bucketList = response.buckets();
        for (Bucket bucket: bucketList) {
            System.out.println("Bucket name "+bucket.name());
        }
    }
}

List the buckets.

import { ListBucketsCommand, S3Client } from "@aws-sdk/client-s3";

const client = new S3Client({});

export const main = async () => {
  const command = new ListBucketsCommand({});

  try {
    const { Owner, Buckets } = await client.send(command);
    console.log(
      `${Owner.DisplayName} owns ${Buckets.length} bucket${
        Buckets.length === 1 ? "" : "s"
      }:`,
    );
    console.log(`${Buckets.map((b) => ` • ${b.Name}`).join("\n")}`);
  } catch (err) {
    console.error(err);
  }
};

Example 1: This command returns all S3 buckets.

Get-S3Bucket

Example 2: This command returns bucket named "test-files"

Get-S3Bucket -BucketName test-files

class BucketWrapper:
    """Encapsulates S3 bucket actions."""

    def __init__(self, bucket):
        """
        :param bucket: A Boto3 Bucket resource. This is a high-level resource in Boto3
                       that wraps bucket actions in a class-like structure.
        """
        self.bucket = bucket
        self.name = bucket.name


    @staticmethod
    def list(s3_resource):
        """
        Get the buckets in all Regions for the current account.

        :param s3_resource: A Boto3 S3 resource. This is a high-level resource in Boto3
                            that contains collections and factory methods to create
                            other high-level S3 sub-resources.
        :return: The list of buckets.
        """
        try:
            buckets = list(s3_resource.buckets.all())
            logger.info("Got buckets: %s.", buckets)
        except ClientError:
            logger.exception("Couldn't get buckets.")
            raise
        else:
            return buckets

require "aws-sdk-s3"

# Wraps Amazon S3 resource actions.
class BucketListWrapper
  attr_reader :s3_resource

  # @param s3_resource [Aws::S3::Resource] An Amazon S3 resource.
  def initialize(s3_resource)
    @s3_resource = s3_resource
  end

  # Lists buckets for the current account.
  #
  # @param count [Integer] The maximum number of buckets to list.
  def list_buckets(count)
    puts "Found these buckets:"
    @s3_resource.buckets.each do |bucket|
      puts "\t#{bucket.name}"
      count -= 1
      break if count.zero?
    end
    true
  rescue Aws::Errors::ServiceError => e
    puts "Couldn't list buckets. Here's why: #{e.message}"
    false
  end
end

# Example usage:
def run_demo
  wrapper = BucketListWrapper.new(Aws::S3::Resource.new)
  wrapper.list_buckets(25)
end

run_demo if $PROGRAM_NAME == __FILE__

async fn show_buckets(strict: bool, client: &Client, region: &str) -> Result<(), Error> {
    let resp = client.list_buckets().send().await?;
    let buckets = resp.buckets();
    let num_buckets = buckets.len();

    let mut in_region = 0;

    for bucket in buckets {
        if strict {
            let r = client
                .get_bucket_location()
                .bucket(bucket.name().unwrap_or_default())
                .send()
                .await?;

            if r.location_constraint().unwrap().as_ref() == region {
                println!("{}", bucket.name().unwrap_or_default());
                in_region += 1;
            }
        } else {
            println!("{}", bucket.name().unwrap_or_default());
        }
    }

    println!();
    if strict {
        println!(
            "Found {} buckets in the {} region out of a total of {} buckets.",
            in_region, region, num_buckets
        );
    } else {
        println!("Found {} buckets in all regions.", num_buckets);
    }

    Ok(())
}

    /// Return an array containing information about every available bucket.
    /// 
    /// - Returns: An array of ``S3ClientTypes.Bucket`` objects describing
    ///   each bucket.
    public func getAllBuckets() async throws -> [S3ClientTypes.Bucket] {
        let output = try await client.listBuckets(input: ListBucketsInput())

        guard let buckets = output.buckets else {
            return []
        }
        return buckets
    }