API Ratelimits for adding URLs to Blocklist

Hey Champs!

I found your service and wanted to give it a spin so i wrote a little something something to add URLs to the blocklist. After it added about 100 i got rate limited by the API. Im wondering why that is the case and how to solve this?

Is this something i need to pay for, to add more URLs automated via the api? What is the limit? Do i need to add a sleep() to my code so i wont get ratelimited and just have it run forever? 

I checked the docs and have not found info on anything ratelimit or similar, so i dont know what the limit actually is. 10 / sec!? 

Please do advise as i have a LOT more urls i want to block, so adding swiftly to the API is necessary. Can i even add more than one per POST? The docs do not specify as well.

Very curious as to how and what can be done to solve this.

Cheers and looking forward to your verbose reply!