This may be a basic question, but I'm having some difficulty finding an answer online.
My project is a MERN application that draws from an existing open-source API. This API utilizes a database that I've already integrated with my own, which I plan to make changes to. So, we can't just use the existing hosting the API has and make those calls. For reference, the API is this one: https://github.com/5e-bits/5e-srd-api.
I've forked it, so right now I have the GitHub repository of the API and the GitHub repository of the application in the same organization. Is there any way for me to externally call this API from my existing project, or would that require dedicated web hosting? Should I just put the API files in my existing project? It has a lot of bulk, so I'm a little worried about cluttering and having to redo my project's structure to match the API's.
For a more concrete example: say I wanted to fetch the /classes route in the API repo from my application repo. How would I go about doing so without changing the structure of either?