```
curl -c ./cookies \
    -F" name=Example Mod" \
    -F "short-description=this is your schort description" \
    -F "version=1.0" \
    -F "game-short-name=kerbal-space-program" \
    -F "game-version=0.24" \
    -F "license=GPLv2" \
    -F "zipball=@ExampleMod.zip" \
    "https://spacedock.info/api/mod/create"
```
Something along these lines. You have to get a session cookie first:
```
curl -F username=SirCmpwn -F password=example -c ./cookies "https://spacedock.info/api/login"
```
https://github.com/KSP-SpaceDock/SpaceDock/blob/alpha/api.md