I have been playing with the idea of utilising NFTs to securely login with Mobile or Web Apps.<p>Are there are any services / SaaS products around this?
The only problem I can see is that forces your users to have installed Metamask in their devices.<p>So not everyone could be able to use that app.<p>Technically speaking previously only make sense to use ERC1155 for that. But now Alchemy launches an API that allows to retreive a JSON will all the NFTs certain wallet has, so it is easier to do it also using ERC721<p>I don´t know any SAAS for that, but it is straighforward to program