ssmmessages:OpenControlChannel is a Write access-level action in the ssmmessages service. Grants permission to open a websocket connection for a registered control channel stream from an instance to Systems Manager service
This action does not support resource-level permissions; use "Resource": "*" in your policy.
No condition keys are documented for this action.
A minimal policy that allows ssmmessages:OpenControlChannel. Replace "Resource": "*" with a specific ARN to follow least privilege.
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "AllowSsmmessagesOpenControlChannel",
"Effect": "Allow",
"Action": "ssmmessages:OpenControlChannel",
"Resource": "*"
}
]
}