using Http protocol Versus Json

Question

I used the http communication method when using the open api, but due to the call limit, what is the disadvantage of parsing and parsing json data (about 90,000 lines) in internal data(like a data.json)? (The api itself has been updated for several years.)

I think it should calls several times but, I don't have enough time and backend knowledge to make it, so I'm asking a question. thanks.