Actions, resources, and condition keys for Amazon Message Delivery Service - Service Authorization Reference

# 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.

References:

- View a list of the API operations available for this service .

Topics

- Actions defined by Amazon Message Delivery Service
- Resource types defined by Amazon Message Delivery Service
- Condition keys for Amazon Message Delivery Service

## 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 types 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 | Grants permission to acknowledge a message, ensuring it will not be delivered again | Write |  |  |
DeleteMessage | Grants permission to delete a message | Write |  |  |
FailMessage | Grants permission to fail a message, signifying the message could not be processed successfully, ensuring it cannot be replied to or delivered again | Write |  |  |
GetEndpoint | Grants permission to route traffic to the correct endpoint based on the given destination for the messages | Read |  |  |
GetMessages | Grants permission to deliver messages to clients/instances using long polling | Read |  |  |
SendReply | Grants permission to send replies from clients/instances to upstream service | Write |  |  |

## Resource types defined by Amazon Message Delivery Service

Amazon Message Delivery Service does not support specifying a resource ARN in the `Resource` element of an IAM policy statement. To allow access to Amazon Message Delivery Service, specify `“Resource”: “*”` in your policy.

## 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 .

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