softwareengineering

How to communicate API Limit between multiple applications?

We currently have 3 Spring boot applications (with multiple instances across machines each) that communicate with an API via HTTP that is not in our hands. This API has a limit on a per-day as well as on a per-month basis. When this limit is reached - and we reach this limit - the API will produce a HTTP 429. I usually expect a Header such as "rate limit: 300/800" in the responses of such an API to know how many requests can be done, but that is absent. Imagine each day/month the limit refreshes and each request I do counts as 1 against that limit, How would I keep track of the limit across all applications/instances, so we can stop sending once the limit is reached?

May 23, 2025 - 17:50
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We currently have 3 Spring boot applications (with multiple instances across machines each) that communicate with an API via HTTP that is not in our hands.

This API has a limit on a per-day as well as on a per-month basis.

When this limit is reached - and we reach this limit - the API will produce a HTTP 429.

I usually expect a Header such as "rate limit: 300/800" in the responses of such an API to know how many requests can be done, but that is absent.

Imagine each day/month the limit refreshes and each request I do counts as 1 against that limit, How would I keep track of the limit across all applications/instances, so we can stop sending once the limit is reached?

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