Sign In with OpenRouter Add OAuth login to any web app. Users authorize on OpenRouter and your app receives an API key — no client registration, no backend, no secrets. Works with any framework. Live demo: openrouterteam.github.io/sign-in-with-openrouter Decision Tree | User wants to… | Do this | |---|---| | Add sign-in / login to a web app | Follow the full PKCE flow + button guidance below | | Get an API key programmatically (no UI) | Just implement the PKCE flow — skip the button section | | Use the OpenRouter SDK after auth | Do PKCE here for the key, then see skill for /streaming | --- O…