How can i get a demo version of Telligent Community ?

Hello  - There is a Free Edition available which has some limitations but would support working with APIs. The Free Edition is available here. If you already have a full licensed version of the platform, it is possible to get a local license for development purposes. Submit a Support Case and the team there should be able to help. 

Actually, i'm already submit an demo request as your instructions, but no one reply 

I have checked with folks here, and it appears that the reply to your original request may have been sent only to one of your coworkers. I have been copied on a reply sent today to your business email address. Cheers! 

thanks, i have received it already

thanks, i have received it already