authsignal/authsignal-php

Authsignal is a drop-in solution that adds modern authentication to your app with minimal coding. Quickly implement passkeys, context-aware MFA, and passwordless login options like biometrics, push notifications, OTP, and TOTP—all working seamlessly with your existing identity stack.

v4.5.0 2026-03-05 02:05 UTC

Requires (Dev)

• donatj/mock-webserver: ^2.5
• phpunit/phpunit: ^9.5

MIT

README

Authsignal PHP SDK

The official Authsignal PHP library for server-side applications. Use this SDK to easily integrate Authsignal's multi-factor authentication (MFA) and passwordless features into your PHP backend.

Installation

Using Composer:

composer require authsignal/authsignal-php

Getting Started

Initialize the Authsignal client with your secret key from the Authsignal Portal and the API URL for your region.

use Authsignal;

// Initialize the client
Authsignal::setApiSecretKey(getenv('AUTHSIGNAL_SECRET_KEY'));
Authsignal::setApiUrl(getenv('AUTHSIGNAL_API_URL')); // Use region-specific URL

API URLs by Region

Region	API URL
US (Oregon)	https://api.authsignal.com/v1
AU (Sydney)	https://au.api.authsignal.com/v1
EU (Dublin)	https://eu.api.authsignal.com/v1

License

This SDK is licensed under the MIT License.

Documentation

For more information and advanced usage examples, refer to the official Authsignal Server-Side SDK documentation.