Confluence currently does not publish rate limits despite the API returning rate limit responses at times. The current rate limiting guidance explains that rate limits are not published because rate limiting is implemented by concurrency and resource limits. However, there are use cases, such as migrations, where apps need to know the rate of API calls that can be safely made before rate limiting may be applied.

Note: There is an equivalent request for Jira: https://ecosystem.atlassian.net/browse/ACJIRA-2255