JSON Composition for sending:

{
	*"auth" : key obtained in get/auth method
	,*"start" : period start date (dd/mm/yyyy)
	,"end" : period end date (dd/mm/yyyy)
	,"resume" : integer – to show summary occurred before "start" (0/no, 1/yes)
	,"sku" :
		[
			{
				"sku" : text
			}
		]
}

(If SKU tag is "*" all active SKUs will be returned)

Returns with:
{
	"code" : integer
	,"stock" :
		[
			"sku" : text
			,"code" : integer (200 or 404)
			,"type" : integer (0=product, 1=supply)
			,"in" : integer – total entries
			,"out" : integer – total exits
			,"balance" : integer – period balance
			,"active" : integer
			,"resume":
				[
					"in" : integer representing entries
					,"out" : integer representing exits
					,"balance" : integer representing balance
				]
		}
}

Code:
200: request fulfilled
404: no SKUs
405: SKU tag not informed
500: invalid auth