I’ve worked with this API in the past. It’s great, but with a couple of disclaimers I’ve put at the end of this post.
What you’ll need to do to call the API is set up API connector, in Bubble, to talk to the AlphaVantage API. There are different ways to do this. The way that I would do it is connect to AlphaVantage through RapidAPI, which is a marketplace that hosts various APIs. AlphaVantage is one of their most popular APIs. You can check it out here: Alpha Vantage API Documentation (alphavantage) | RapidAPI
Once you’re set up on RapidAPI, you want to create an API in API Connector, and set up the calls you need (like Global Quote), and pass the parameters you need (like symbol). I’ve posted a tutorial on using RapidAPI/API Connnector/Bubble, to do almost the same as what you’re doing. You can see it below. The RapidAPI intro starts around 5 minutes.
Hope this helps! If not, happy to clarify anything.