Creates a private namespace based on DNS, which is visible only inside a specified Amazon VPC. The namespace defines your service naming scheme. For example, if you name your namespace <code>example.com</code> and name your service <code>backend</code>, the resulting DNS name for the service is <code>backend.example.com</code>. Service instances that are registered using a private DNS namespace can be discovered using either a <code>DiscoverInstances</code> request or using DNS. For the current quota on the number of namespaces that you can create using the same Amazon Web Services account, see <a href="https://docs.aws.amazon.com/cloud-map/latest/dg/cloud-map-limits.html">Cloud Map quotas</a> in the <i>Cloud Map Developer Guide</i>.

{
  "success": true,
  "data": {
    "id": "abc123",
    "created_at": "2025-01-01T00:00:00Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters"
  }
}