gns3-server/docs/api/examples/post_portsudp.txt

curl -i -X POST 'http://localhost:8000/ports/udp' -d '{}'

POST /ports/udp HTTP/1.1
{}


HTTP/1.1 201
CONNECTION: keep-alive
CONTENT-LENGTH: 25
CONTENT-TYPE: application/json
DATE: Thu, 08 Jan 2015 16:09:15 GMT
SERVER: Python/3.4 GNS3/1.3.dev1
X-ROUTE: /v1/ports/udp

{
    "udp_port": 10000
}