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

curl -i -X GET 'http://localhost:8000/version'

GET /version HTTP/1.1



HTTP/1.1 200
CONNECTION: keep-alive
CONTENT-LENGTH: 29
CONTENT-TYPE: application/json
DATE: Thu, 08 Jan 2015 16:09:15 GMT
SERVER: Python/3.4 GNS3/1.3.dev1
X-ROUTE: /v1/version

{
    "version": "1.3.dev1"
}