OAuth 2.0 · OpenID Connect · Passkeys
Auth without the per-user bill
A hosted identity provider with passkeys, social and enterprise login, machine-to-machine tokens, and MCP authorization for AI agents. Unlimited users on the free plan: no MAU tiers, no credit card.
- 8 backend SDKs: Node, Go, Java, .NET, PHP, Python, Ruby, Rust
- Frontend examples: React, Next.js, Vue, Angular, SvelteKit, Nuxt, Remix
- EU-hosted: data stays in the EU region
import { useAuthAction } from '@authaction/web-sdk/react';
function App() {
const { isAuthenticated, user, loginWithRedirect, logout } =
useAuthAction();
if (!isAuthenticated) {
return (
<button onClick={() => loginWithRedirect()}>Log in</button>
);
}
return (
<div>
<p>Hello {user?.name}</p>
<button onClick={() => logout()}>Log out</button>
</div>
);
}Products
Purpose-built authentication and authorization solutions for every use case
Frontend Authentication
SPAs, server-rendered apps and every major frontend framework. SDKs for React, Next.js, Vue, Angular, SvelteKit, Nuxt and Remix.
Learn moreMachine-to-Machine
Client credentials tokens for service-to-service calls, scoped per API audience.
Learn morePasskey Plus
WebAuthn passwordless sign-in, added alongside the login methods you already run.
Learn moreMCP Server Authorization
OAuth for Model Context Protocol servers, including dynamic client registration.
Learn moreAI Agent Identity
Give agents a delegated identity instead of a shared API key. Every action records the person who authorised it, using OAuth 2.0 Token Exchange.
Learn moreEnterprise Connections
Let customers sign in with their own identity provider: SAML 2.0 and Active Directory / LDAP, unlimited and free.
Learn moreCustom Domain Mapping
Serve login pages and authentication endpoints from your own branded domain with automatic SSL certificates and full OpenID Connect discovery support.
Learn moreRegion-Based Data Storage
Store authentication, user data and files securely in your preferred region (AU, CA, CN, EU, IN, JP, US) for compliance and performance.
Secure File Storage
Secure file storage and retrieval with integrated authentication for user and organization-level file management.
Learn moreHosted API Reference
Publish your OpenAPI document on your own domain, public or private behind the login you already run. Push it from CI.
Learn morePlan Management
Complete plan management with integrated authentication for subscription-based business models.
Learn moreCustom Email
Send transactional emails from your own domain with full SMTP configuration, custom templates, and delivery tracking.
Learn morePlatform Capabilities
Enterprise-grade security features and developer tools built into every plan
Multi-factor Authentication
Secure your applications with SMS, email, biometric, and app-based multi-factor authentication options.
Single Sign-On (SSO)
Streamline user access with seamless authentication across multiple applications and services.
Identity Management
Centralize user identity management with comprehensive user profiles and role-based access controls.
Social Login
Enable quick and easy sign-in with popular social media platforms while maintaining security.
Official SDKs & APIs
Integrate using AuthAction's own SDKs for frontend and all major backend languages. No third-party libraries needed.
Analytics & Reporting
Gain insights into authentication patterns, security events, and user behavior with detailed analytics.
AuthAction CLI
Manage tenants, users, roles, connections, and more directly from your terminal. Automate any workflow with a full-featured command-line tool.
Learn moreWho is building on AuthAction
Founders shipping real products, not pilots.
Custom domain mapping was the thing that sold me. Our login lives on our own domain, so customers never see a third-party URL mid-signup. That it costs nothing on the free plan still surprises me.
Our users are German, and the hosted login pages speak German without us maintaining a single translation file. Integration took an afternoon, and I have not had to think about auth since.
Ready to secure your application?
Get started with AuthAction today. Every feature is completely free. No credit card, no limits, no catch.