Seems like Nimbo (https://nimbo.sh) has a Business Source License (https://github.com/nimbo-sh/nimbo/blob/master/LICENSE), so you might want to check with them regarding licensing terms for a startup that is using their code and/or docs in "production"?

Otherwise, this idea is interesting and probably generalizable to other applications. Maybe it's not crystal clear to me, but what are the advantages of your service over existing solutions such as Nimbo and Spotty? FWIW it might be worthwhile adding this to your website.

Good luck!