How can I create an auto promotion bot api?

I have been trying to figure out how to do this for some time, and I simply havent been able to do it. How can I successfully develop one? What all do I need may be able to help me figure this out better on my own, but right now I am stumped.

First up, there's multiple ways to do this. You need to have PHP knowledge or JSON knowledge. You can do it with either one, although in my opinion I recommend using JavaScript + JSON. Here's where I recommend you start:

roblox-js-server GitHub

That link will send you to a GitHub post by sentanos a.k.a. Froast. He created that api, and it's highly useful and works like a charm. It's simple to setup. If you want to create your own, here's the steps you should take:

1. Learn some PHP or JSON (and JS obviously).
2. Create a bot account, and rank it as high as possible in your group.
3. Save the password and username of the bot on a piece of paper or on a document so you don't forget it.
4. Use HTTPService to send requests to a server (I recommend using Heroku, as it's free).
5. The server will recognize the request and use your PHP/JSON code to log into your bot account and do whatever you decide (pass arguments to choose).
6. That's it! Hope I helped! :)