`average-seconds` | int | Optional. If specified, readings will be grouped into lumps of this many seconds and averaged. For example a value of 3600 (1 hour) will return 1 data point per hour, with the value of each point an average of all the readings for that hour.
`format` | string | Optional. Specifies the format that the response will be returned in. Valid values: `json`, `csv`. Default: `json`