Hey Product Hunt community! Every developer knows the pain of user drop-off right after signup. You implement "Sign in with Google" in five minutes, but the moment the user logs in, you still have to build a 6-field onboarding form to collect their full name, verified email, and delivery/billing address. For users, re-typing the exact same structured data into every new app is frustrating. For developers, writing address validation, state machines, and responsive forms is a waste of engineering time. We built Passpage to solve this: For Individuals: Save your contact and address bundles once. Select what you want to share field-by-field (required vs. optional) and revoke access anytime from a single dashboard. For Developers: Keep your existing auth setup (Supabase, Firebase, Auth0). Add our 2-line drop-in widget on your post-login onboarding screen and receive verified, structured JSON payloads directly via our server-to-server OAuth-style /exchange API. Check out the live interactive simulation and early access at passpage.outercirclelab.com. We’d love to hear your thoughts, feedback on the handshake protocol, and what integrations/scopes you'd like to see next!

Passpage

1-tap post-auth onboarding data with granular user consent

1-tap post-auth onboarding data with granular user consent