The WISPr[0] standard was created for this purpose, and is (or was by now?) used by companies such as iPass to their customers to transparently log in to most W

The WISPr[0] standard was created for this purpose, and is (or was by now?) used by companies such as iPass to their customers to transparently log in to most WiFi hotspots. I don't think that standard is accessibly anywhere these days. I made a Python implementation [1] that should still work. [0] https://en.wikipedia.org/wiki/WISPr https://en.wikipedia.org/wiki/WISPr [1] https://github.com/wichert/wispr https://github.com/wichert/wispr