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homebridge-button-platform
Discontinued A Homebridge platform plugin to create virtual buttons that respond to HTTP requests from things like Flic buttons or an Elgato Stream Deck.
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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
on a side note, if you really want to do this and cant grant access codes tiy cab automate it. you could make an NFC tag that has a web address associated with it ONLY accessible on your network. https://github.com/Djelibeybi/homebridge-button-platform this plugin creates virtual buttons that can be called using an API call. which could easily be triggered by visitng a web address. if you encode that address to the tag and only have it accessible on the network (so dont forward your ports to the open internet please) then the thinking is a guest could hop on wifi, scan the tag, then get entry KIND OF like HomeKey