The ic-http-lambda is just a side proof of concept of mine, to show what’s possible with an HTTP interface. The fact that I run it on AWS is immaterial, once a feature like that becomes official nobody will remember my little experiment 
Can I write something to fetch data from outside http APIs and save it to IC, or forward to telegram chat?
No, there is no good story for doing HTTP requests from a canister; it is somewhat at odds with replicated deterministic execution. So not for now.