its good and I tried but one thing which I feel should be kept private which is API_KEY. I am not going to paste my API_KEY anywhere. it would be great if you would handle it in backend and give some free credits. later you can put price on it to use.
fair, even though the API key is only stored in sessionStorage, or localStorage if you choose to save it, I understand why people still would not feel comfortable pasting it into a random website