isendi Identity Kit – Passkeys, SSO & Zero-Knowledge Age Verification (Source Code, EN/DE)

Passkeys, single sign-on and zero-knowledge age checks. Ready to ship. Three tested source-code modules for passwordless login, OpenID Connect SSO, portable user profiles and privacy-preserving age verification. Pay once, own the code.

What you get

• Passkey SSO: a passkey (WebAuthn Level 3) identity provider with OpenID Connect single sign-on. It has autofill sign-in, passkey management, consent screens, single logout and an account page, plus a Docker image and two demo apps. No runtime dependencies.
• Profile Design System: design tokens (light/dark, importable into Figma via Tokens Studio) and web components for avatars, identity cards, linked accounts, a GDPR consent centre, an asset vault and passkey management. Includes signed portable profiles (did:key) and six page templates. Works in React, Vue, Svelte or plain HTML. No runtime dependencies.
• ZK Age Verification: a zero-knowledge proof that a user is "18 or older", built from an issuer-signed credential. The website never sees a birth date or an ID document. The proof takes about 1–2 seconds in the browser. Includes issuer, wallet and verifier libraries, middleware and a demo shop.

Also included

• 184 automated tests, including 28 browser tests with a virtual passkey authenticator
• Documentation in English and German, plus an offline HTML documentation site
• Dev container and Docker Compose setup
• GDPR templates (record of processing, technical measures)
• Security design and a production checklist for every module

Licence

Team licence: one organisation, up to 10 developers, unlimited end products and client projects. Reselling the kit itself as source code or a template is not allowed. Requires Node.js 22.18 or newer.

Delivery: instant download (ZIP, about 4 MB) after purchase.

Note: this is a set of technical building blocks, not a certified compliance product. The zero-knowledge module ships with a development setup; a production setup script is included. Parts of the ZK module use GPL-3.0 open-source components (circomlib, snarkjs), as explained in the included notices.

Deutsch: Passkeys, Single Sign-on und Altersprüfung per Zero-Knowledge – startklar. Drei getestete Quellcode-Module für passwortlose Anmeldung, Single Sign-on über OpenID Connect, portable Nutzerprofile und datensparsame Altersprüfung. Einmal bezahlen, der Code gehört Ihnen.

• Passkey SSO: Identity Provider mit Passkeys und Single Sign-on über OpenID Connect, Kontoverwaltung, Docker-Image und zwei Demo-Apps. Ohne Laufzeitabhängigkeiten.
• Profil-Design-System: Design-Tokens und Web Components für Avatare, Identitätskarten, verknüpfte Konten, ein DSGVO-Einwilligungs-Center, einen Asset-Tresor und die Passkey-Verwaltung. Ohne Laufzeitabhängigkeiten.
• ZK-Altersnachweis: belegt „18 oder älter“ per Zero-Knowledge-Beweis, ohne dass die Website ein Geburtsdatum oder Ausweisdokument sieht.

184 automatisierte Tests, Dokumentation auf Deutsch und Englisch, Dev-Container, DSGVO-Vorlagen. Team-Lizenz für eine Organisation mit bis zu 10 Entwicklern und unbegrenzt vielen Projekten. Sofortiger Download nach dem Kauf.