greetings, I believe there is a bug in OpenAPI specification:

MetricCollectionResponseBody:
      type: object
      properties:
        metrics:
          type: array
          items:
            $ref: '#/components/schemas/Metric'

http://teststream.local/taskmanagers/tm-1-64/metrics?get=Status.JVM.Memory.Mapped.TotalCapacity the actual response has this format:

[{"id":"Status.JVM.Memory.Mapped.TotalCapacity","value":"0"}]

according to OpenAPI spec, it should be:

{
  "metrics": [
    {
      "id": "Status.JVM.Memory.Mapped.TotalCapacity",
      "value": "0"
    }
  ]
}