For me it shows "available" on some domains even though it isn't. Could be case-sensitive equality checking?

Thanks for the feedback, I originally tried to import all domains ~1b, but that took a week, so I'll always be a week behind unless I do some serious optimisation there! Currently using godaddy API, which has FAST or ACCURATE options. Given the generator requests are already 10s long (most of which is gpt4) I opted for the FAST, but I can trial it with the ACCURATE and see how it goes. Thanks again!

Maybe you could take a look at a Bloom Filter datastructure, space efficiënt probalistic set for testing if something is present

[1] https://en.m.wikipedia.org/wiki/Bloom_filter

no

Could you clarify your point? More detailed feedback would be valuable for OP.

I just tried to use this, and it just feels wrong. It only allows a small amount of top level domains, and the domains that come out of it feel corporate.

Thanks for the feedback, I added a handful more TLD's, but need to think harder about the UX for the full list. The corporate feel is interesting, maybe adding a tone dimension like formal, neutral, light hearted could be interesting. You can also add the tone to the description although that's not obvious, I was thinking of adding some examples to help.