AWS Identity and Access Management
User Guide

The AWS Documentation website is getting a new look!
Try it now and let us know what you think. Switch to the new look >>

You can return to the original look by selecting English in the language selector above.

Actions, Resources, and Condition Keys for Amazon Message Delivery Service

Amazon Message Delivery Service (service prefix: ec2messages) provides the following service-specific resources, actions, and condition context keys for use in IAM permission policies.

Actions Defined by Amazon Message Delivery Service

You can specify the following actions in the Action element of an IAM policy statement. Use policies to grant permissions to perform an operation in AWS. When you use an action in a policy, you usually allow or deny access to the API operation or CLI command with the same name. However, in some cases, a single action controls access to more than one operation. Alternatively, some operations require several different actions.

The Resource column indicates whether each action supports resource-level permissions. If there is no value for this column, you must specify all resources ("*") in the Resource element of your policy statement. If the column includes a resource type, then you can specify an ARN of that type in a statement with that action. Required resources are indicated in the table with an asterisk (*). If you specify a resource-level permission ARN in a statement using this action, then it must be of this type. Some actions support multiple resource types. If the resource type is optional (not indicated as required), then you can choose to use one but not the other.

For details about the columns in the following table, see The Actions Table.

Actions Description Access Level Resource Types (*required) Condition Keys Dependent Actions
AcknowledgeMessage Acknowledges a message, ensuring it will not be delivered again Write
DeleteMessage Deletes a message Write
FailMessage Fails a message, signifying the message could not be processed successfully, ensuring it cannot be replied to or delivered again Write
GetEndpoint Routes traffic to the correct endpoint based on the given destination for the messages Read
GetMessages Delivers messages to clients/instances using long polling Read
SendReply Sends replies from clients/instances to upstream service Write

Resources Defined by Amazon Message Delivery Service

Amazon Message Delivery Service has no service-defined resources that can be used as the Resource element of an IAM policy statement.

Condition Keys for Amazon Message Delivery Service

EC2 Messages has no service-specific context keys that can be used in the Condition element of policy statements. For the list of the global context keys that are available to all services, see Available Keys for Conditions in the IAM Policy Reference.