There might be a way to get elevated access if your server is requesting the subtitles according to [4]:
There is download limit per IP, so if you wish to download subtitles on your server, contact us for more information, otherwise you might hitting download limit.
[x] Is the above stated limit from [1] a daily limit?
[3] mentions as per 24 hours
[x] How can I increase the limit?
The only way judging from [1] and [3] appears to be buying a VIP package
[x] What is the max limit? 1000 seems crazy low for a max. A max that low would make an application with many users impossible.
It seems like that is actually the limit for [1] unfortunately.
[x] Can I get special server access to their API as mentioned in [4]?
This answer will determine the architecture of the app. If I can wrap the subtitle download in my own api, i won't have to make the download call from the client browser then upload the srt file to my api.
I emailed them back after getting my user agent to ask about this.
After going back and forth with support@opensubtitles.org, they offer a $50 monthly service for more downloads, but it isn't worth it when I can just download the subs from the client IP for free.
Conclusion:
Use the O.G. API from [2] and make the limited requests to OpenSubtitles from the user's browser if this were to actually be scalable to many users. That way the requests will be coming from a different IP for each end user and not all routed through my server IP address.
According to [1]:
The request limit from [2] (the O.G. API) appears to be 40 requests per 10 seconds per IP address:
There might be a way to get elevated access if your server is requesting the subtitles according to [4]:
Conclusion: Use the O.G. API from [2] and make the limited requests to OpenSubtitles from the user's browser if this were to actually be scalable to many users. That way the requests will be coming from a different IP for each end user and not all routed through my server IP address.
References: [1] https://opensubtitles.stoplight.io [2] https://trac.opensubtitles.org/projects/opensubtitles/wiki/XMLRPC [3] https://www.opensubtitles.com/en/support_us [4] https://trac.opensubtitles.org/projects/opensubtitles/wiki/DevReadFirst