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AuthStack Docs

Introduction

AuthStack is a usage-based authentication platform designed to provide secure, scalable authentication without subscription fees.

What is AuthStack?

Section titled “What is AuthStack?”

AuthStack provides:

  • Social Login Providers - Google, GitHub, Microsoft, Apple, and Discord
  • OAuth 2.0 & OpenID Connect - Industry-standard authentication protocols
  • JWT Tokens - Secure access and refresh tokens
  • Usage-Based Pricing - Pay only for active users, 1,000 MAU free
  • Audit Trail - Track user activity across applications
  • Per-App Provider Control - Configure which providers each application can use

Supported OAuth Providers

Section titled “Supported OAuth Providers”
ProviderAuthentication Method
GoogleID Token validation
GitHubOAuth code exchange
MicrosoftAzure AD / Personal accounts
AppleSign in with Apple
DiscordOAuth2 code exchange

Why AuthStack?

Section titled “Why AuthStack?”

Usage-Based Pricing

Section titled “Usage-Based Pricing”

No subscriptions, no tiers, no hidden fees. Pay only for what you use:

  • 1,000 MAU free every month
  • $0.005 per MAU above free tier
  • 10,000 API calls free, then $0.10 per 1,000

Hybrid Provider Configuration

Section titled “Hybrid Provider Configuration”

Configure OAuth credentials globally once, then enable specific providers per-application. This gives you:

  • Centralized credential management
  • Granular control over which apps use which providers
  • Easy onboarding for new applications

Security First

Section titled “Security First”

Built with security best practices:

  • Password hashing with bcrypt
  • JWT with configurable expiration
  • Rate limiting and brute force protection
  • Secure token storage
  • Encrypted OAuth credentials at rest

Easy Integration

Section titled “Easy Integration”

SDKs and documentation for:

  • Flutter
  • React
  • Vue
  • REST API

Quick Example

Section titled “Quick Example”
// Flutter integration - login with any provider
final response = await authApi.loginWithProvider(
  provider: OAuthProvider.google,
  token: credential.idToken,
);


if (response.isSuccess) {
  storage.saveTokens(response.tokens);
  router.go('/dashboard');
}

Next Steps

Section titled “Next Steps”