Hi @jezsnap,
Some comments...
- Maybe you already know it, but Snap! Api docs are here.
- Aside this, maybe the main "problem" is how to implement this. I don't know if you are working on a web page, a server, a web service... This forum topic may be useful to you.
- And if you don't need an online use, you also can use Snap4Arduino desktop edition. It has a webserver to connect http request directly to our Snap! world. Then, you can connect other webpages, other Snap! projects, other PCs from your network, mobile apps... Snap4Arduino http protocol docs here
Joan