Auth.js

Open Source. Full Stack. Own Your Data.

Easy

Built in support for 84+ popular services
(Google, Facebook, Auth0, Apple…)
Use with any OAuth 2 or OpenID Connect provider
Built in email / passwordless / magic link
Use with any username / password store

Flexible

Runtime agnostic, runs anywhere!
Vercel Edge Functions, Node.js, Serverless…
Use with any modern framework!
Next.js, SolidStart, SvelteKit…
Bring Your Own Database - or none!
MySQL, Postgres, MSSQL, MongoDB…
Choose database sessions or JWT

Secure

Signed, prefixed, server-only cookies
Built-in CSRF protection
JWT with JWS / JWE / JWK
Doesn't rely on client side JavaScript

npm install @auth/core

Add authentication in minutes!

Next.js

// auth.ts
import NextAuth from "next-auth"
import GitHub from "next-auth/providers/github"
export const { auth, handlers } = NextAuth({ providers: [ GitHub ] })

// middleware.ts
export { auth as default } from "auth"

// app/api/auth/[...nextauth]/route.ts
import { handlers } from "auth"
export const { GET, POST } = handlers
export const runtime = "edge" // Optional

SvelteKit /hooks.server.ts

// src/auth.ts
import { SvelteKitAuth } from "@auth/sveltekit"
import GitHub from '@auth/sveltekit/providers/github'
import { GITHUB_ID, GITHUB_SECRET } from "$env/static/private"
export const { handle } = SvelteKitAuth({
  providers: [
    GitHub({
      clientId: GITHUB_ID,
      clientSecret: GITHUB_SECRET
    })
  ],
})

// src/hooks.server.ts
export { handle } from "./auth"

SolidStart /routes/api/auth/[...solidauth].ts

import { SolidAuth } from "@auth/solid-start"
import GitHub from "@auth/core/providers/github"
export const { GET, POST } = SolidAuth({
  providers: [
    GitHub({
      clientId: process.env.GITHUB_ID,
      clientSecret: process.env.GITHUB_SECRET
    })
  ]
})

Example Code

Auth.js is an open source community project.