@aluizdinizsilva,

You can list the image using API:

curl -X GET “https://api.digitalocean.com/v2/images” -H “Authorization: Bearer $TOKEN” | python -mjson.tool | grep -i cassandra

The response is:

100 5853 0 5853 0 0 9742 0 –:–:– –:–:– –:–:– 12244
“name”: “Cassandra on 14.04”,
“slug”: “cassandra”,
“name”: “cassandra1”,

So, I think you can create a droplet using API too.

Hope this help.