Anyone know the limits of Namecheap API?

I need to use their API for mass domain checking availability.
Before I make an investment of $50 I want to know if some of you is using them and if its reliable or I will get limited very quickly.
I currently use the dynadot API and I get banned every 30 minutes even if I use 1 domain/second checked.
I need to check around 50k domains daily

Thanks!

Hi,

I'm in the same position myself. Did you find any more info on the API limit?

Thanks.

I've checked 100k at a time with it. It takes time as you have to pace the checks but namecheap is the best I've found.