Is it me you're looking for? Jokes aside it depends on the script(s) you're using. The API page has video & text instructions for all of the ones I know of: https://turkerview.com/account/api/#api-instructions Just click the script name link and it'll load a video for the script you're using
I'm not the best with the technical stuff, so perhaps @ChrisTurk has a concise answer ready to go? My understanding is that it basically it connects your mturk activity with TVJS and other scripts. You can see more information here: https://turkerview.com/account/api/