Returns a list of existing clusters.

See also: AWS API Documentation

Request Syntax

response = client.list_clusters(
  • nextToken (string) --

    The nextToken value returned from a ListClusters request indicating that more results are available to fulfill the request and further calls are needed. If maxResults was provided, it's possible the number of results to be fewer than maxResults .


    This token should be treated as an opaque identifier that is only used to retrieve the next items in a list and not for other programmatic purposes.

  • maxResults (integer) -- The maximum number of cluster results that ListClusters returned in paginated output. When this parameter is used, ListClusters only returns maxResults results in a single page along with a nextToken response element. The remaining results of the initial request can be seen by sending another ListClusters request with the returned nextToken value. This value can be between 1 and 100. If this parameter isn't used, then ListClusters returns up to 100 results and a nextToken value if applicable.
Return type



Response Syntax

    'clusterArns': [
    'nextToken': 'string'

Response Structure

  • (dict) --

    • clusterArns (list) --

      The list of full Amazon Resource Name (ARN) entries for each cluster that's associated with your account.

      • (string) --
    • nextToken (string) --

      The nextToken value to include in a future ListClusters request. When the results of a ListClusters request exceed maxResults , this value can be used to retrieve the next page of results. This value is null when there are no more results to return.


  • ECS.Client.exceptions.ServerException
  • ECS.Client.exceptions.ClientException
  • ECS.Client.exceptions.InvalidParameterException


This example lists all of your available clusters in your default region.

response = client.list_clusters(


Expected Output:

    'clusterArns': [
    'ResponseMetadata': {
        '...': '...',