Your emoji is your identity
One identity for humans, agents, and everything in between. Interactive login with passkeys. API keys for AI agents. Delegated tokens when agents act on your behalf.
509,000,000+ possible identities with just 3 emoji
How It Works
Three steps to a passwordless identity
Pick Your Emoji
Choose 3-7 emoji from our curated palette of 800+ emoji. Your unique combination becomes your identity — memorable, visual, and fun.
Register Your Passkey
Your browser prompts for Face ID, fingerprint, or security key. No passwords to remember or leak. Your private key never leaves your device.
Sign In Anywhere
Any app that supports "Sign in with Passji" (OIDC) lets you authenticate with your emoji + passkey. One identity across the web.
Three Ways to Auth
One identity system for every authentication scenario
Interactive login with emoji + passkeys. Face ID, fingerprint, or security key. The gold standard for human authentication.
- Pick 3-7 emoji as your identity
- Register passkeys on any device
- Sign in anywhere with biometrics
API keys for AI agents and automated systems. Same emoji identity, machine-friendly auth. No browser required.
- Generate API keys from your identity
- Scoped permissions per key
- Revoke anytime from dashboard
Agents acting on behalf of humans. You grant scoped permissions, the agent gets a token. Full audit trail.
- OAuth consent flow for delegation
- Time-limited, scoped tokens
- Revocable at any time
Why Passji?
Identity reimagined for the modern web
Passkey-only authentication. No passwords to leak, no phishing attacks, no credential stuffing. Just biometrics and hardware keys.
Industry-standard OpenID Connect. Add "Sign in with Emoji" to your app the same way you'd add Google or GitHub OAuth.
Every identity builds a trust score over time based on account age, auth frequency, and app diversity. Apps can use it for progressive access.
Runs on Cloudflare Workers globally. Sub-50ms auth responses. D1 database for persistence. No cold starts, no servers to manage.
Built on the WebAuthn standard. Supports Touch ID, Face ID, Windows Hello, YubiKey, and any FIDO2 authenticator.
No email, no phone, no name required. Your emoji is your pseudonym. Apps see only your emoji identity and trust score.
The Math
More identities than you'd ever need
With just 3 emoji from our 800+ palette, there are over 509 million possible identities. Go up to 7 emoji and you get more combinations than atoms in the observable universe. Your emoji sequence is uniquely yours.
Add "Sign in with Emoji" to your app
Passji is a standard OIDC provider. If your app supports OAuth 2.0 or OpenID Connect, you can integrate Passji in minutes. No special SDK required.
- Standard OIDC/OAuth 2.0 flows
- PKCE support for SPAs and mobile apps
- Scopes: openid, emoji, profile, trust
- ID tokens with emoji identity and trust score
- Refresh token rotation (30-day TTL)
// 1. OIDC Discovery
// GET https://passji.com/.well-known/openid-configuration
// 2. Redirect to authorize
const authUrl = new URL("https://passji.com/authorize");
authUrl.searchParams.set("client_id", "your_client_id");
authUrl.searchParams.set("redirect_uri", "https://yourapp.com/callback");
authUrl.searchParams.set("response_type", "code");
authUrl.searchParams.set("scope", "openid emoji trust");
authUrl.searchParams.set("state", generateState());
// 3. Exchange code for tokens
const tokens = await fetch("https://passji.com/token", {
method: "POST",
body: new URLSearchParams({
grant_type: "authorization_code",
code: authCode,
redirect_uri: "https://yourapp.com/callback",
client_id: "your_client_id",
client_secret: "your_client_secret",
}),
}).then(r => r.json());
// tokens.id_token contains:
// { sub: "abc123", emoji_id: "🦊🌸🎯", trust_score: 0.85 }Trust Scoring
Reputation that grows with you
Account Age
Older accounts are more trusted. Ramps linearly over 180 days.
Auth Frequency
Regular usage builds trust. Logarithmic scale, caps at 100 auths.
App Diversity
Using multiple apps shows real usage. Caps at 10 unique relying parties.
Multi-Device
Multiple passkeys mean the identity is well-secured.
Trust scores range from 0.0 to 1.0 and are included in OIDC tokens when the trust scope is requested.
FAQ
Claim Your Emoji Identity
Pick your emoji, register your passkey, and own a unique identity on the web. It takes 30 seconds.
Get Started