shell> curl --data-binary @- --dump - http://localhost:8529/_api/collection/products/checksum

HTTP/1.1 200 OK
content-type: application/json; charset=utf-8

{ 
  "id" : "1393813851", 
  "name" : "products", 
  "isSystem" : false, 
  "status" : 3, 
  "type" : 2, 
  "checksum" : 3786187659, 
  "revision" : "1394141531", 
  "error" : false, 
  "code" : 200 
}