Your auth stack works. TryMellon adds passkeys to it — without replacing sessions, user models, or how you manage identity. Plug in the SDK, validate the session token on your backend, done.
Your B2B customers scale to 10,000 users. Your plan price stays flat.
npm install @trymellon/jsimport { TryMellon } from '@trymellon/js';
// 1) Initialize client
const clientResult = TryMellon.create({
appId: 'your-app-id',
publishableKey: 'pk_live_...',
});
if (!clientResult.ok) throw clientResult.error;
const client = clientResult.value;
// 2) Sign in user
const result = await client.signIn({
externalUserId: 'user_123',
});
// 3) Validate session on backend
if (result.ok) {
console.log('Session Token:', result.value.sessionToken);
}Scale without rewriting. Isolation and API-first already solved.
B2B ready from day one. Organization, member and role isolation already handled. Your customers create their own organizations; you just bill.
Organization → Projects → Apps
Stop sharing raw API keys. Your AI agent hits POST /v1/onboarding/ai and provisions its own scoped credentials instantly. Built for the era of Autonomous Systems.
// Your AI agent does this automatically
POST /v1/onboarding/ai
{ "user_role": "agent", "email": "[email protected]" }
→ { "publishable_key": "pk_live_...", "app_id": "..." }Deslizá para ver más
Real-time Webhooks for Audit Logs, User behavior, and Custom B2B flows.
Zero-PII defaults, scoped credentials for AI agents, and clear data ownership boundaries—designed for B2B teams that live with compliance reviews.
User identity is tied to cryptographic keys, not emails or passwords. You can build B2B auth flows without storing names or emails on our side.
Your AI agents self-provision via POST /v1/onboarding/ai, receiving scoped credentials instead of raw API keys. You can rotate, revoke, and audit them without editing prompts or agents.
You keep control of your users and logs. When you export or delete data via our APIs, PII is removed on our side and you can plug the exports into your own data warehouse or SIEM.
No mobile page? No problem. Use our bridge domain to add QR-based login in minutes — switch to your own domain later with zero migration.
No /mobile-auth page to build. The SDK + bridge domain handles everything.
WebAuthn passkeys on mobile. Session tokens, not passwords. Zero PII stored by default on our side.
Switch to your own domain by changing one config value. No user re-registration.
Decentralized, anonymous auth—even for AI agents. One API that issues scoped credentials instead of raw keys, so you can rotate and audit them centrally.
Add TryMellon and get auth that works for humans and agents.
Agent gets credentials
POST /onboarding/ai → tenant, client_id, publishableKey
OAuth token
Client credentials flow → Bearer token
Provision users
POST /v1/users → external_user_id
Allow origin
PATCH application → allowed_origins
End users sign in
Your app uses SDK → passkeys, no passwords
From npm install to first passkey login in under 30 minutes.
TryMellon is a hosted backend and JavaScript SDK that adds passkey and WebAuthn login to your product without forcing you to rebuild authentication from scratch. B2B teams use it to get multi-tenant isolation, zero-PII defaults, and predictable pricing that scales with real usage instead of MAUs. The same APIs cover both human users and AI agents: frontends call the SDK, backends validate session tokens via HTTP, and you keep full control over sessions and user models in your own services.
npm install @trymellon/js
Dashboard → create app → add your origin → copy App ID and Client ID (publishable key).
Call client.signUp() or client.signIn().
Send session_token to your backend; call TryMellon GET /v1/sessions/validate with Authorization: Bearer <session_token>; then set your own cookie/session.
For B2B SaaS teams
Problem: Password-based login with inconsistent 2FA across customers; cross-device auth required custom flows per tenant.
Solution: Installed the SDK, enabled QR default bridge, wired session validation to existing middleware — tenants kept their own user models.
What changed: New tenants enable cross-device auth via a config flag instead of an engineering project.
For AI platform teams
Problem: Secrets scattered across prompts and config files; rotating a leaked key meant redeploying multiple agents.
Solution: Each agent calls POST /v1/onboarding/ai to self-provision scoped credentials; session tokens validated on the backend before any action.
What changed: Incident response is one revocation call instead of a prompt trawl and redeployment.
Try a passkey flow right here. No account needed.
This demo uses sandbox mode. Your passkey is not stored.
Uses your device's biometric or PIN. Nothing is stored.
Per-MAU micro-charges penalize growth. We provide realistic, tiered infrastructure limits.
The pricing examples on this page, including the “Cost for 10K Users” comparison row, are snapshots based on publicly available pricing pages for TryMellon, Clerk, and Auth0 as of March 2026. They are meant to illustrate the shape of costs for a typical B2B team evaluating passwordless auth vendors, not as a contractual quote for any provider. Each vendor may change prices, tiers, or discounts at any time, and your actual bill will depend on usage, region, and any custom agreements you sign. For TryMellon, the Starter, Growth, Scale, and Enterprise tiers described here are the default SaaS plans; the dashboard and docs always contain the most current details and should be treated as the source of truth.
POCs and Sandboxes. Real passkeys, no credit card.
For POCs and Sandboxes.
B2B ticket: unlimited Webhooks and AI agents.
Usage-based for teams that scale.
Base $159/mo + metered per user above 100k.
Unlimited. Dedicated. Compliant.
Sales inquiries by email only.
One auth layer for humans and AI. Zero-PII, cross-device QR, and AI agent onboarding without raw API keys—with pricing that scales with real usage.
| Feature | TryMellon | Clerk | Auth0 |
|---|---|---|---|
| Cost for 10K users (typical B2B tier) | $79/mo | $220/mo | $735/mo |
| Predictable B2B pricing (no per-MAU surprise bills) | |||
| AI agent onboarding (scoped credentials, no raw API keys) | |||
| Zero-PII defaults for B2B | |||
| Cross-device QR auth (bridge domain included) | |||
| Entity Enrollment (Keys & Padlock) | |||
| Passkeys / WebAuthn | |||
| B2B multi-tenancy (orgs, apps, allowed origins) | |||
| Email fallback & device recovery | |||
| Event-driven webhooks & audit logs | |||
| User data report & deletion (GDPR) | |||
| Cross-device registration QR (add passkey from trusted device) | |||
| Zero-dependency SDK (no transitive supply-chain exposure) |
Install the SDK, register the first passkey, validate the session on your backend — under 30 minutes. Free up to 1,000 users, no credit card.
Free for up to 1,000 total users. No monthly active limits. No credit card required.