4 Application Request Limit Reached

Your application (not just the user) has exceeded the app-level API call rate limit. This is different from error 17—this limit applies to all users of your app collectively.

What causes this error?

Your application (not just the user) has exceeded the app-level API call rate limit. This is different from error 17—this limit applies to all users of your app collectively.

How to fix it

1. Reduce call volume across ALL users: Unlike user-level throttling, this affects your entire app. Audit every integration point making API calls.
2. Cache aggressively: Store responses locally so you’re not repeatedly asking Meta for the same data.
3. Monitor x-app-usage: This response header tells you exactly what percentage of your app-level limit you’ve consumed.