# Make Auth Yours

Tailored your authentication system with our developer-centric solution.

[Start for Free](https://portal.authgear.com/?utm_source=feature-extensibility&utm_medium=link&utm_campaign=start-for-free) [Get a Demo](/content/schedule-demo/index.html)

Free plan includes **unlimited MAUs**

## Why Extensibility Matters

Every product has its unique rules — approvals, allowlists, risk checks. Authgear gives developers the tools to build them cleanly with Hooks and the Admin API, so your team can focus on the product.

## Blocking and Non-Blocking Authentication Hooks

Control authentication behavior or trigger workflows with Hooks that run before, during, or after key user events.

### Non-blocking hooks

- Get notified when something happens; run workflows in your systems while users continue.

user.created, user.profile.updated, user.authenticated, user.disabled, user.reenabled, etc.

### Blocking hooks

- Intercept a flow and decide what happens next

user.pre_created, user.profile.pre_updated, user.pre_schedule_deletion, oidc.jwt.pre_create, etc.

### What you can build

- **Allowlist & signup windows**

Only permit signups from approved IPs/domains or during business hours.
- **Token enrichment**

Add custom claims to ID/Access tokens at issuance.
- **Profile governance**

Validate or transform attributes before they are saved.
- **Lifecycle automation**

Fire webhooks on user signup to open tickets, sync CRM.

### Admin API

Everything you can do in the Management Portal is available via Admin API, so ops can scale with code. Provision users, update roles/groups, manage sessions, pull analytics, and export audit logs.

## Developer Experience

Build fast with SDKs

JavaScript/TypeScript (web & SPA), iOS (Swift), Android (Kotlin), React Native, Flutter,…

Extend Functions with Hooks

TypeScript or Webhooks

Automate operations with Admin API

Provision users, assign roles, and query logs programmatically

## Start building authentication that fits your logic, your stack, your users

Free plan includes **unlimited MAUs**