curl --data-binary @- -X POST --dump - "http://localhost:8529/_api/import?type=documents&collection=test&createCollection=true"
{ "name" : "test", "gender" : "male", "age" : 39 }
{ "type" : "bird", "name" : "robin" }

HTTP/1.1 201 Created
server: triagens GmbH High-Performance HTTP Server
connection: Keep-Alive
content-type: application/json; charset=utf-8

{"error":false,"created":2,"errors":0}