Run

curl -H 'X-Auth-Token: <YOUR_TOKEN>' https://cp-ams1.scaleway.com/servers/<YOUR_SERVER_ID>/user_data/ssh-host-fingerprints

compare output with results of ssh <YOUR_USER>@<YOUR_SERVER_IP>

cp-ams1 needs to be changed if you use non amsterdam based server.

Sources:

  1. community.online.net

  2. Scaleway API documentation