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@authtagon/authtagon

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  • License MIT

Authentication that doesn't suck. Built for SvelteKit with adapters for every framework you actually use.

Package Exports

  • @authtagon/authtagon
  • @authtagon/authtagon/components
  • @authtagon/authtagon/express
  • @authtagon/authtagon/nextjs
  • @authtagon/authtagon/react
  • @authtagon/authtagon/sveltekit

Readme

๐Ÿ” Authtagon

npm version npm downloads TypeScript Security License

Authentication that doesn't suck. Built for SvelteKit with adapters for every framework you actually use.

Security-focused authentication with zero-trust principles, OWASP compliance, and great developer experience.

๐Ÿš€ Quick Start โ€ข ๐Ÿ”’ Security โ€ข ๐Ÿ› ๏ธ API โ€ข ๐Ÿ› Issues


๐ŸŽฏ Why Authtagon?

The only authentication library that's security-first, SvelteKit-native, and doesn't make you want to cry.

// One line. That's it.
const auth = authtagon({ database: 'sqlite://auth.db', secret: process.env.AUTH_SECRET })

โœจ What Makes Authtagon Different

Feature Authtagon Others
๐ŸŽฏ SvelteKit Native Built specifically for SvelteKit Adapted from React/generic
๐Ÿ”’ Security First OWASP-compliant, zero-trust by default Security as afterthought
โšก Developer Experience One-line setup, TypeScript-first Complex configuration hell
๐Ÿ›ก๏ธ Enterprise Features MFA, breach detection, audit logging built-in Enterprise features cost extra
๐Ÿ”„ Framework Agnostic Works with Next.js, Express, React Limited framework support
๐Ÿ“ฆ Self-Hosted Your data, your control Vendor lock-in

๐Ÿš€ Quick Start

One-Line Setup

npm install @authtagon/authtagon
// That's literally it
import { authtagon } from 'authtagon'

const auth = authtagon({
  database: 'sqlite://auth.db',
  secret: process.env.AUTH_SECRET
})

SvelteKit Integration

// src/hooks.server.ts
import { authtagon } from 'authtagon'

const auth = authtagon({
  database: process.env.DATABASE_URL,
  secret: process.env.AUTH_SECRET,
  // Zero-trust and MFA enabled by default ๐Ÿ”’
})

export const handle = auth.handle
<!-- Your app immediately has authentication -->
<script>
  import { page } from '$app/stores'

  $: user = $page.data.user
</script>

{#if user}
  <h1>Welcome, {user.email}!</h1>
  <form method="POST" action="/auth/signout">
    <button>Sign Out</button>
  </form>
{:else}
  <a href="/auth/signin">Sign In</a>
{/if}

That's it. You now have enterprise-grade authentication with MFA, breach detection, and zero-trust security.


๐Ÿ”ฅ Framework Adapters

Next.js (App Router)

// middleware.ts
import { NextAuthAdapter } from '@authtagon/authtagon/nextjs'

export default NextAuthAdapter({
  database: process.env.DATABASE_URL,
  secret: process.env.AUTH_SECRET
}).middleware

Express

// server.js
import { ExpressAuthAdapter } from '@authtagon/authtagon/express'

const auth = new ExpressAuthAdapter({
  database: process.env.DATABASE_URL,
  secret: process.env.AUTH_SECRET
})

app.use('/auth', auth.router())

React (Client)

import { AuthProvider, useAuth } from '@authtagon/authtagon/react'

function App() {
  return (
    <AuthProvider>
      <Dashboard />
    </AuthProvider>
  )
}

function Dashboard() {
  const { user, signOut } = useAuth()

  return user ? (
    <div>
      <h1>Welcome {user.email}</h1>
      <button onClick={() => signOut()}>Sign Out</button>
    </div>
  ) : (
    <SignInForm />
  )
}

๐Ÿ”’ Security Features

Built by security engineers, for security engineers.

๐Ÿ›ก๏ธ Zero-Trust Architecture

// Every request is verified. Every. Single. One.
const result = await auth.validateSession(token, {
  ipAddress: request.ip,
  userAgent: request.headers['user-agent'],
  deviceFingerprint: getDeviceFingerprint(request)
})

// Risk-based authentication automatically enabled
if (result.riskScore > 0.8) {
  // Authtagon automatically requires MFA
}

๐Ÿ” Multi-Factor Authentication

// Enable MFA for a user (TOTP, SMS, Email, WebAuthn)
await auth.mfa.enable(userId, { method: 'totp' })

// Or enforce for high-risk actions
await auth.mfa.challenge(userId, { reason: 'suspicious_login' })

๐Ÿšจ Breach Detection

// Automatically check passwords against 500M+ known breaches
const result = await auth.signUp({
  email: 'user@example.com',
  password: 'password123' // โŒ Authtagon stops this
})
// Error: "Password found in known data breaches"

๐Ÿ“Š Real-Time Risk Assessment

// Continuous risk scoring based on behavior
const risk = await auth.risk.assess({
  userId,
  action: 'transfer_money',
  amount: 50000,
  location: { country: 'Unknown' }
})
// risk.score: 0.95 (High risk - require additional verification)

๐Ÿ“‹ Compliance & Audit Logging

// GDPR, SOX, HIPAA compliance built-in
await auth.audit.log({
  event: 'data_access',
  userId,
  resource: 'patient_records',
  ipAddress: request.ip,
  regulation: 'HIPAA'
})

// Automatic data retention and anonymization

โšก Performance & Scale

๐Ÿš„ Performance

  • Session Validation: Fast (<5ms typical)
  • Password Hashing: Argon2id (PHC winner)
  • Database: Efficient queries with pooling
  • Memory: Lightweight design
  • Scale: Designed for modern web apps

๐Ÿ“ˆ Production Ready

// Handles scale automatically
const auth = authtagon({
  database: 'postgresql://...',
  session: {
    strategy: 'jwt', // Stateless for horizontal scaling
    maxAge: 30 * 24 * 60 * 60 // 30 days
  },
  security: {
    rateLimit: {
      maxAttempts: 5,
      windowMs: 15 * 60 * 1000,
      blockDuration: 60 * 60 * 1000
    }
  }
})

๐Ÿ› ๏ธ API Reference

Core Authentication

auth.signUp(userData, context?)

Register a new user with automatic security checks.

const result = await auth.signUp({
  email: 'user@example.com',
  password: 'secure-password-123',
  metadata: { role: 'user' }
}, {
  ipAddress: '192.168.1.1',
  userAgent: 'Mozilla/5.0...'
})

// Returns: { success: true, user: {...}, requiresVerification: boolean }

auth.signIn(credentials, context?)

Authenticate user with risk assessment and MFA.

const result = await auth.signIn({
  email: 'user@example.com',
  password: 'secure-password-123',
  mfaCode: '123456' // Required if MFA enabled
}, {
  ipAddress: '192.168.1.1',
  userAgent: 'Mozilla/5.0...',
  rememberMe: true
})

// Returns: { success: true, session: {...}, token: 'jwt...' }

auth.validateSession(token, context?)

Validate session with zero-trust verification.

const validation = await auth.validateSession('session_token', {
  ipAddress: '192.168.1.1',
  userAgent: 'Mozilla/5.0...',
  deviceFingerprint: 'device_fp_123'
})

// Returns: { valid: true, user: {...}, session: {...}, riskScore: 0.1 }

Security Features

auth.mfa.*

Multi-factor authentication management.

// Enable MFA
await auth.mfa.enable(userId, { method: 'totp' })
await auth.mfa.enable(userId, { method: 'sms', phoneNumber: '+1234567890' })
await auth.mfa.enable(userId, { method: 'webauthn' })

// Generate backup codes
const codes = await auth.mfa.generateBackupCodes(userId)

// Verify MFA token
const isValid = await auth.mfa.verify(userId, '123456')

auth.risk.*

Risk assessment and threat detection.

// Assess risk for any action
const risk = await auth.risk.assess({
  userId,
  action: 'sensitive_operation',
  context: { ipAddress, userAgent, deviceFingerprint }
})

// Get user risk profile
const profile = await auth.risk.getProfile(userId)

auth.audit.*

Compliance and audit logging.

// Log security events
await auth.audit.log({
  event: 'login_success',
  userId,
  ipAddress,
  metadata: { mfaUsed: true }
})

// Query audit logs
const logs = await auth.audit.query({
  userId,
  startDate: new Date('2024-01-01'),
  endDate: new Date(),
  events: ['login_success', 'login_failure']
})

๐Ÿ—„๏ธ Database Support

Authtagon works with your existing database setup:

Automatic Detection

const auth = authtagon({
  database: 'sqlite://auth.db',           // SQLite
  database: 'postgresql://user:pass@...',  // PostgreSQL
  database: 'mysql://user:pass@...',       // MySQL
  database: 'mongodb://user:pass@...',     // MongoDB
})

Custom Adapters

import { DatabaseAdapter } from '@authtagon/authtagon'

class CustomAdapter implements DatabaseAdapter {
  async createUser(userData) { /* your implementation */ }
  async getUserByEmail(email) { /* your implementation */ }
  async createSession(sessionData) { /* your implementation */ }
  // ... implement required methods
}

const auth = authtagon({
  database: new CustomAdapter(),
  secret: process.env.AUTH_SECRET
})

ORM Integration

// Prisma
import { PrismaAdapter } from '@authtagon/authtagon/prisma'
const auth = authtagon({ database: new PrismaAdapter(prisma) })

// Drizzle
import { DrizzleAdapter } from '@authtagon/authtagon/drizzle'
const auth = authtagon({ database: new DrizzleAdapter(db) })

// Kysely
import { KyselyAdapter } from '@authtagon/authtagon/kysely'
const auth = authtagon({ database: new KyselyAdapter(db) })

๐Ÿ”ง Configuration

Environment Variables

# Required
AUTH_SECRET=your-super-secret-32-character-key
DATABASE_URL=your-database-connection-string

# Optional - MFA
TWILIO_ACCOUNT_SID=your-twilio-sid
TWILIO_AUTH_TOKEN=your-twilio-token

# Optional - Email
SMTP_HOST=smtp.gmail.com
SMTP_USER=your-email@gmail.com
SMTP_PASS=your-app-password

# Optional - Breach Detection
HIBP_API_KEY=your-haveibeenpwned-api-key

Advanced Configuration

const auth = authtagon({
  database: process.env.DATABASE_URL,
  secret: process.env.AUTH_SECRET,

  session: {
    strategy: 'jwt',           // 'jwt' | 'database'
    maxAge: 30 * 24 * 60 * 60, // 30 days
    updateAge: 24 * 60 * 60,   // Update every 24 hours
    sameSite: 'strict',        // CSRF protection
    secure: true,              // HTTPS only
    httpOnly: true             // No client-side access
  },

  security: {
    // Password requirements (OWASP compliant)
    password: {
      minLength: 12,
      checkBreaches: true,        // Check against known breaches
      requireComplexity: false    // OWASP recommends against composition rules
    },

    // Rate limiting
    rateLimit: {
      enabled: true,
      maxAttempts: 5,
      windowMs: 15 * 60 * 1000,   // 15 minutes
      blockDuration: 60 * 60 * 1000 // 1 hour block
    },

    // Multi-factor authentication
    mfa: {
      enabled: true,
      enforceForAdmins: true,
      methods: ['totp', 'sms', 'email', 'webauthn']
    },

    // Zero-trust policies
    zeroTrust: {
      enabled: true,
      requireDeviceVerification: true,
      maxRiskScore: 0.8,
      adaptiveAuthentication: true
    }
  },

  audit: {
    enabled: true,
    retention: 90,              // Days
    encryptLogs: true,
    excludeFields: ['password', 'secret']
  }
})

๐Ÿš€ Deployment

Vercel

// middleware.ts
import { NextAuthAdapter } from '@authtagon/authtagon/nextjs'

export default NextAuthAdapter({
  database: process.env.DATABASE_URL,
  secret: process.env.AUTH_SECRET
}).middleware

export const config = {
  matcher: ['/dashboard/:path*', '/api/:path*']
}

Docker

FROM node:18-alpine
WORKDIR /app
COPY package*.json ./
RUN npm ci --only=production
COPY . .
EXPOSE 3000
CMD ["npm", "start"]

Railway / Render / Fly.io

Works out of the box with standard Node.js deployments.


๐Ÿ†š Comparison

Feature Authtagon Auth0 Supabase Lucia Better Auth
Setup Complexity One line Complex Medium Medium Medium
SvelteKit Native โœ… Built for โŒ Generic โŒ Generic โœ… Native โŒ Generic
Self-Hosted โœ… Your control โŒ SaaS only โŒ SaaS only โœ… Self-hosted โœ… Self-hosted
Enterprise MFA โœ… Built-in โœ… Paid tier โœ… Paid tier โŒ None โŒ None
Breach Detection โœ… Built-in โŒ None โŒ None โŒ None โŒ None
Zero-Trust โœ… Default โœ… Paid tier โŒ None โŒ None โŒ None
Risk Assessment โœ… Built-in โœ… Paid tier โŒ None โŒ None โŒ None
Audit Logging โœ… GDPR ready โœ… Paid tier โœ… Basic โŒ None โŒ None
Pricing Free $23+/month $25+/month Free Free
Vendor Lock-in None High High None None

๐Ÿ“š Migration Guides

From Auth0

// Before (Auth0)
import { Auth0Provider } from '@auth0/nextjs-auth0'

// After (Authtagon) - Same features, better DX, no vendor lock-in
import { authtagon } from 'authtagon'
const auth = authtagon({ database: '...', secret: '...' })

From Supabase Auth

// Before (Supabase)
import { createClient } from '@supabase/supabase-js'

// After (Authtagon) - Self-hosted, more features, lower cost
import { authtagon } from 'authtagon'
const auth = authtagon({ database: '...', secret: '...' })

From Lucia

// Before (Lucia) - Minimal but lots of manual work
import { lucia } from 'lucia'

// After (Authtagon) - SvelteKit native with enterprise features
import { authtagon } from 'authtagon'
const auth = authtagon({ database: '...', secret: '...' })

๐Ÿงช Testing

Unit Tests

import { authtagon } from 'authtagon'
import { describe, it, expect } from 'vitest'

describe('Authentication', () => {
  const auth = authtagon({
    database: ':memory:',  // In-memory SQLite for testing
    secret: 'test-secret-key-32-characters-long'
  })

  it('should register and authenticate user', async () => {
    const signUp = await auth.signUp({
      email: 'test@example.com',
      password: 'secure-password-123'
    })

    expect(signUp.success).toBe(true)

    const signIn = await auth.signIn({
      email: 'test@example.com',
      password: 'secure-password-123'
    })

    expect(signIn.success).toBe(true)
    expect(signIn.user.email).toBe('test@example.com')
  })
})

Integration Tests

// Test with actual database
import { PostgreSqlContainer } from '@testcontainers/postgresql'

describe('Integration Tests', () => {
  let container: PostgreSqlContainer
  let auth: ReturnType<typeof authtagon>

  beforeAll(async () => {
    container = await new PostgreSqlContainer().start()
    auth = authtagon({
      database: container.getConnectionUri(),
      secret: 'test-secret-key-32-characters-long'
    })
  })

  afterAll(async () => {
    await container.stop()
  })

  // Your integration tests...
})

๐Ÿค Contributing

We welcome contributions! See our Contributing Guide.

Development Setup

git clone https://github.com/authtagon/authtagon
cd authtagon
npm install
npm run dev
npm test

Code Standards

  • TypeScript strict mode
  • 100% test coverage
  • Security-first mindset
  • OWASP compliance

๐Ÿ†˜ Support & Community

This is a hobby project built in collaboration with Claude AI, but we're serious about making authentication better!

  • ๐Ÿ› Issues: GitHub Issues - Report bugs or request features
  • ๐Ÿ’ก Discussions: GitHub Discussions - Ask questions, share ideas
  • ๐Ÿ“ง Contact: Open a GitHub issue for the fastest response

๐Ÿค Want to Help?

This project is open source and community-driven:

  • โญ Star the repo if you find it useful
  • ๐Ÿ› Report issues you encounter
  • ๐Ÿ’ก Suggest features or improvements
  • ๐Ÿ”ง Contribute code via pull requests
  • ๐Ÿ“š Help improve documentation

We may not have a fancy website yet, but the code is solid and the vision is real!


๐Ÿ“„ License

MIT License - see LICENSE file for details.


Built with โค๏ธ as a hobby project in collaboration with Claude AI.

We got tired of authentication libraries that suck, so we built one that doesn't.

โญ Star us on GitHub โ€ข ๐Ÿš€ Get Started โ€ข ๐Ÿ› Report Issues

Authtagon - Authentication that doesn't suck.