Getting 429 errors (i.e. rate-limited) when doing hardly any requests

Hi,

We've got a few 429 errors from https://analytics.adobe.io/discovery/me recently. I understand from https://developer.adobe.com/analytics-apis/docs/2.0/guides/faq/ that

> The enforced rate limit for API calls is 12 requests every 6 seconds per user

But we only do about 100 requests per day, and on the times when we got the error we'd done no other requests for several minutes. We haven't got 429 from any other endpoint.

So is there another rate limit being applied? Perhaps this endpoint is special somehow?

Alternatively, we share the OAuth Server-to-Server credentials with other teams; are we sharing the quota with them? Or does it apply per access token (which we're not sharing)? I.e. what does "user" mean in the docs above?

Thanks for any help.