Every Opterius Panel installation requires a license key. Without one, the panel runs in Free mode — which limits you to 5 hosting accounts on a single server. Entering a valid key unlocks your plan's account limits and server count.
Where to Get a License Key
Log in to opterius.com, go to Dashboard → Licenses, and click Add Server on your license. Copy the key — it starts with opt_.
If you don't have an account yet, register for free. A Free plan license is issued automatically on registration.
Entering the Key
- Log in to your Opterius Panel at
https://YOUR_SERVER_IP:8443 - In Server Mode, go to Settings → License
- Paste your license key and click Activate
The Agent will immediately try to verify the key against the Opterius license server. A green confirmation means the license is active. The plan tier and account limit are shown on the same page.
How Verification Works
The Opterius Agent (the Go binary running on your server) phones home to opterius.com to verify the license. It checks:
- The key is valid
- The key is authorized for this server's IP address
- The plan has not expired
The result is cached in /etc/opterius/license-cache.json. After the first successful verification, the panel keeps working normally for 48 hours even if the license server is unreachable — so a brief network outage won't affect your customers.
The Agent re-verifies every 24 hours automatically.
[!NOTE] The license is tied to your server's public IP address. If you move the panel to a different server (new IP), go to opterius.com → Dashboard → Licenses, move the license to the new IP, and re-activate from the panel.
What Happens if a License Expires
If the license expires and can't be renewed:
- Read operations keep working — your team can still log in, view accounts, and read data
- Write operations are blocked — creating accounts, issuing SSL, changing PHP versions, etc. will return a "license required" error
- A red banner appears at the top of the panel explaining the issue
To restore full function, renew or upgrade your license at opterius.com and re-verify from the panel.
License Tiers
| Plan | Servers | Hosting Accounts | Price |
|---|---|---|---|
| Free | 1 | Up to 5 | Free |
| Starter | 1 | Unlimited | $19/mo |
| Business | Up to 5 | Unlimited per server | $59/mo |
| Datacenter | Unlimited | Unlimited per server | $179/mo |