AIS api rate-limit policy

[Sinordio]

Hi,
Has anyone investigated rate-limit policy of AIS available appointment API?

https://ais.usvisa-info.com/{country_code}/niv/schedule/{schedule}/appointment/days/{facility_id}.json?appointments[expedite]=false

Well, I have launched some investigations, what I've found out until now is that the rate-limit is based on user identity, not IP address or something else. And it uses a simple counter for number of requests, not common rate-limiting algorithms such as fixed-window or sliding window, etc.

I created this issue to share our findings in this regard. Please share your investigations. I hope we can find a way to bypass the rate-limit.

[implank]

目前发现每五小时不能超过200次？大概

[byjiang1996]

我也觉得是每四个到五个小时evaluate一次，我每小时平均10次access也被封了: NO AVAILABLE DATE