@authon/js
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Drop-in browser authentication SDK — Auth0 alternative, open-source auth
Before installing the SDK, create an Authon project and get your API keys:
Create a project at Authon Dashboard
Get your API keys from Project Settings → API Keys
pk_live_...) — use in your frontend codepk_test_...) — for development, enables Dev TeleportConfigure OAuth providers (optional) in Project Settings → OAuth
https://api.authon.dev/v1/auth/oauth/redirectTest vs Live keys: Use
pk_test_...during development. Switch topk_live_...before deploying to production. Test keys use a sandbox environment with no rate limits.
npm install @authon/js
<!-- index.html -->
<!DOCTYPE html>
<html>
<head><title>My App</title></head>
<body>
<button id="sign-in-btn">Sign In</button>
<div id="user-info"></div>
<script type="module">
import { Authon } from '@authon/js';
const authon = new Authon('pk_live_YOUR_PUBLISHABLE_KEY');
document.getElementById('sign-in-btn').addEventListener('click', () => {
authon.openSignIn();
});
authon.on('signedIn', (user) => {
document.getElementById('user-info').textContent = `Hello, ${user.email}`;
document.getElementById('sign-in-btn').style.display = 'none';
});
</script>
</body>
</html>
import { Authon } from '@authon/js';
const authon = new Authon('pk_live_YOUR_PUBLISHABLE_KEY');
// Opens popup, falls back to redirect if blocked
await authon.signInWithOAuth('google');
// Force redirect mode
await authon.signInWithOAuth('google', { flowMode: 'redirect' });
// Supported providers: google, apple, github, discord, facebook,
// microsoft, kakao, naver, line, x
import { Authon } from '@authon/js';
const authon = new Authon('pk_live_YOUR_PUBLISHABLE_KEY');
// Sign up
const user = await authon.signUpWithEmail('user@example.com', 'MyP@ssw0rd', {
displayName: 'Alice',
});
// Sign in
const user = await authon.signInWithEmail('user@example.com', 'MyP@ssw0rd');
// Synchronous — no network request
const user = authon.getUser();
// { id, email, displayName, avatarUrl, emailVerified, ... }
const token = authon.getToken();
// Use token for authenticated API calls
// ShadowDOM modal — no CSS conflicts with your app
await authon.openSignIn();
await authon.openSignUp();
await authon.signOut();
// Register passkey (user must be signed in)
const credential = await authon.registerPasskey('My MacBook');
// Sign in with passkey
const user = await authon.authenticateWithPasskey();
const { message } = await authon.web3GetNonce('0xAbc...', 'evm', 'metamask', 1);
const signature = await window.ethereum.request({
method: 'personal_sign',
params: [message, '0xAbc...'],
});
const user = await authon.web3Verify(message, signature, '0xAbc...', 'evm', 'metamask');
import { Authon, AuthonMfaRequiredError } from '@authon/js';
// Setup MFA (user must be signed in)
const setup = await authon.setupMfa();
document.getElementById('qr').innerHTML = setup.qrCodeSvg;
await authon.verifyMfaSetup('123456'); // code from authenticator app
// Sign in with MFA
try {
await authon.signInWithEmail('user@example.com', 'password');
} catch (err) {
if (err instanceof AuthonMfaRequiredError) {
const user = await authon.verifyMfa(err.mfaToken, '123456');
}
}
authon.on('signedIn', (user) => console.log('Signed in:', user.email));
authon.on('signedOut', () => console.log('Signed out'));
authon.on('error', (err) => console.error(err.message));
authon.on('mfaRequired', (mfaToken) => { /* show MFA dialog */ });
authon.on('tokenRefreshed', (token) => { /* update API client */ });
| Variable | Required | Description |
|---|---|---|
AUTHON_PUBLISHABLE_KEY | Yes | Project publishable key (pk_live_... or pk_test_...) |
AUTHON_API_URL | No | Optional — defaults to api.authon.dev |
new Authon(publishableKey: string, config?: AuthonConfig)
| Config Option | Type | Default | Description |
|---|---|---|---|
apiUrl | string | https://api.authon.dev | API base URL |
mode | 'popup' | 'embedded' | 'popup' | Modal display mode |
theme | 'light' | 'dark' | 'auto' | 'auto' | UI theme |
locale | string | 'en' | UI locale |
containerId | string | -- | Element ID for embedded mode |
appearance | Partial<BrandingConfig> | -- | Override branding |
| Method | Returns |
|---|---|
openSignIn() | Promise<void> |
openSignUp() | Promise<void> |
signInWithEmail(email, password) | Promise<AuthonUser> |
signUpWithEmail(email, password, meta?) | Promise<AuthonUser> |
signInWithOAuth(provider, options?) | Promise<void> |
signOut() | Promise<void> |
getUser() | AuthonUser | null |
getToken() | string | null |
| Method | Returns |
|---|---|
sendMagicLink(email) | Promise<void> |
sendEmailOtp(email) | Promise<void> |
verifyPasswordless({ token?, email?, code? }) | Promise<AuthonUser> |
| Method | Returns |
|---|---|
registerPasskey(name?) | Promise<PasskeyCredential> |
authenticateWithPasskey(email?) | Promise<AuthonUser> |
listPasskeys() | Promise<PasskeyCredential[]> |
renamePasskey(id, name) | Promise<PasskeyCredential> |
revokePasskey(id) | Promise<void> |
| Method | Returns |
|---|---|
web3GetNonce(address, chain, walletType, chainId?) | Promise<Web3NonceResponse> |
web3Verify(message, signature, address, chain, walletType) | Promise<AuthonUser> |
listWallets() | Promise<Web3Wallet[]> |
linkWallet(params) | Promise<Web3Wallet> |
unlinkWallet(walletId) | Promise<void> |
| Method | Returns |
|---|---|
setupMfa() | Promise<MfaSetupResponse & { qrCodeSvg }> |
verifyMfaSetup(code) | Promise<void> |
verifyMfa(mfaToken, code) | Promise<AuthonUser> |
getMfaStatus() | Promise<MfaStatus> |
disableMfa(code) | Promise<void> |
regenerateBackupCodes(code) | Promise<string[]> |
| Method | Returns |
|---|---|
organizations.list() | Promise<OrganizationListResponse> |
organizations.create(params) | Promise<AuthonOrganization> |
organizations.get(orgId) | Promise<AuthonOrganization> |
organizations.update(orgId, params) | Promise<AuthonOrganization> |
organizations.delete(orgId) | Promise<void> |
organizations.invite(orgId, params) | Promise<OrganizationInvitation> |
| Event | Payload |
|---|---|
signedIn | AuthonUser |
signedOut | -- |
tokenRefreshed | string |
mfaRequired | string (mfaToken) |
passkeyRegistered | PasskeyCredential |
web3Connected | Web3Wallet |
error | Error |
| Feature | Authon | Clerk | Auth.js |
|---|---|---|---|
| Pricing | Free | $25/mo+ | Free |
| OAuth providers | 10+ | 20+ | 80+ |
| ShadowDOM modal | Yes | No | No |
| MFA/Passkeys | Yes | Yes | Plugin |
| Web3 auth | Yes | No | No |
| Organizations | Yes | Yes | No |
MIT
FAQs
Authon core browser SDK — ShadowDOM login modal, OAuth, session management
The npm package @authon/js receives a total of 124 weekly downloads. As such, @authon/js popularity was classified as not popular.
We found that @authon/js demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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