How not to exceed the number of hits to a third-party resource from your domain?

Question

API

Guys, hello!
I've never dealt with this kind of problem before, so first things first...
The goal is for my site to request media resources from another api (or even a site), which, as expected, has a limited number of requests per a certain period of time to balance the load.
For my part, I see the problem in such a way that as soon as, conditionally, ~ 10 users make requests from my site at the same time, the api of another domain will simply return http code 429, and I would like to avoid this. Please tell me a solution or a vector where to dig ((I know about caching only in theory. Perhaps it is connected with this case, that's why the tag was added))

Answer 1

Such is the circle: before requesting api info, open the file and see when the request was made, if less than, for example, 10 minutes ago, then give the cache ... if more, then ask for api info, process it, save it in cache, write down the request time to the file.
More or less like this…