TokBox is part now of Nexmo.
The content you have clicked on is still on our tokbox.com site and will move to nexmo.com in the future.
Add Messaging, Voice, and Authentication to your apps with Nexmo APIs
The OpenTok Server SDKs let you create OpenTok sessions, generate tokens, and work with OpenTok archiving.
Redirecting to https://tokbox.com/developer/sdks/server/