Tapjoy now supports mediation via DeltaDNA SmartAds. DeltaDNA takes care of your Tapjoy dashboard setup for you, so you will not need to configure your Tapjoy dashboard account.
You can learn more about DeltaDNA mediation by going to their documentation page.
The DeltaDNA SmartAds SDKs can be downloaded from their GitHub repository. SmartAds SDK integration instructions can be found in the readme files there.