Is there a Rate Limiter for serverless functions?

I checked the traffic for your site (for that particular function) over the past 30 days and I don’t see any sudden drop (as would have been the case if we blocked):

Furthermore, I checked the IP you reported and don’t see any blocks for that either. Is there a specific time frame we can check? What’s the error message that you received that made you feel it might be blocked or rate limited?

These are the list of status codes that we served:

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Not a single 429.