Auth Block
Enterprise-grade authentication that developers love. Stop building auth, start building your product.
Complete Authentication Suite
Everything you need to secure your application, organized by feature category
Core Authentication
User registration, login, password management, passwordless email OTP, magic links, and session handling with RS256 JWT tokens.
Multi-Factor Authentication
Two channels: zero-friction email OTP and TOTP authenticator apps. 10 backup codes, usage tracking, integrated into all login flows.
Enterprise SSO
Full OIDC Provider with discovery, JWKS, and token endpoints supporting authorization_code, refresh_token, client_credentials, and agent-identity grants. App-level OIDC with per-app discovery.
API & Service Tokens
API keys with AWS Gateway integration plus M2M service tokens (90-day) and agent tokens (24h). CRUD, regenerate, revoke, and usage tracking with up to 100 active tokens per company.
User Management
Complete admin tools with roles, permissions, and fine-grained access control.
Multi-tenant Architecture
True data isolation per tenant with company-level RSA keys for JWT signing.
AI Agent Identity
NEWRegister and authenticate AI agents with Ed25519 signature verification. OAuth token exchange with agent-identity grant type, lifecycle management, and RFC 7662 token introspection.
Bot Protection
NEWInline reCAPTCHA enforcement with per-tenant feature flags. Protects registration, login, passwordless, and password reset endpoints. Kill switch for instant disable without frontend changes.
Built for Production
Enterprise-ready from day one with industry-standard security and APIs
RS256 JWT Tokens
Asymmetric encryption with company-level RSA key pairs. Public keys exposed via JWKS endpoints for token verification.
- JWKS public key endpoint
- Per-company RSA keys
JSON:API Response Format
Standardized API responses following JSON:API specification for consistent integration across all endpoints.
- Consistent structure
- Standard error handling
OIDC Provider
OpenID Connect compliant identity provider with discovery, JWKS, and multi-grant token endpoint. Supports app-level OIDC with per-app discovery.
- Discovery + JWKS endpoints
- 4 grant types incl. agent-identity
- Token introspection (RFC 7662)
Trusted by Developers Worldwide
From startups to enterprises, developers choose 23blocks Auth because it just works
SnowCheck
Outdoor Recreation Platform
Challenge:
2M+ authentication requests during peak ski season with 10x traffic spikes during weather events
Solution:
Auto-scaling authentication with AWS Gateway integration
Result:
Zero downtime during busiest season, 99.99% uptime maintained
HealthBridge Solutions
Healthcare Technology
Challenge:
HIPAA compliance requirements with detailed audit trails and automatic session termination
Solution:
Built-in HIPAA-compliant authentication with comprehensive audit logging
Result:
Production-ready in 2 weeks, security auditor approval
RideShare.co
Mobility Platform
Challenge:
Track user sessions across multiple devices while maintaining security and reducing friction
Solution:
Device fingerprinting and session management with trusted device features
Result:
70% cost reduction, 3x faster login, 85% less friction
TechCorp Solutions
Enterprise Software
Challenge:
Lost enterprise deals due to missing SSO capabilities and complex Azure AD requirements
Solution:
Multi-tenant SSO with flexible IdP configurations and OIDC provider
Result:
Fortune 100 client onboarded in 4 days, deal closed
Perfect For Your Use Case
From SaaS platforms to enterprise applications, 23blocks Auth scales with your needs
SaaS Platforms
Multi-tenant authentication with tenant isolation and custom branding
- Data isolation per tenant
- White-label login pages
- Unlimited scaling
Enterprise Applications
SSO, compliance, and advanced security features for large organizations
- OIDC Provider capabilities
- SOC2 & HIPAA compliance
- Advanced audit trails
API-First Companies
JWT tokens, API keys, service tokens, and M2M authentication
- Service tokens (90-day M2M)
- API key management
- JWKS + AWS Gateway
AI Agent Platforms
Authenticate AI agents alongside human users with dedicated identity management
- Agent registration + lifecycle
- Ed25519 signature verification
- OAuth agent-identity grant
Start Building Today
Get your first month free. No credit card required. Enterprise authentication without the enterprise complexity.
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