README

A professional, standalone, and OOP-compliant PHP library for integrating with the NowPayments.io API.

Features

• Supports all main methods: Invoices, Payments, Estimates, Currencies, and Status.
• Environment Aware: Seamlessly switch between Sandbox and Production.
• Secure Webhooks: Built-in IPN signature verification.
• Exception Handling: Custom exceptions with raw API error detail.
• Standalone: Perfect for any PHP project or framework.

Installation

composer require sohagsrz/nowpayments-php-sdk

Basic Usage

use NowPayments\NowPayments;

$sdk = new NowPayments('YOUR-API-KEY', true); // true for Sandbox

// Get API Status
$status = $sdk->getStatus();

// Create a professional crypto invoice
$invoice = $sdk->createInvoice([
    'price_amount' => 10.00,
    'price_currency' => 'usd',
    'order_id' => '12345',
    'order_description' => 'Premium Upgrade',
    'success_url' => 'https://yoursite.com/success',
    'ipn_callback_url' => 'https://yoursite.com/webhook'
]);

// Redirect user to payment
header('Location: ' . $invoice['invoice_url']);

Webhook Verification

$receivedSig = $_SERVER['HTTP_X_NOWPAYMENTS_SIG'];
$payload = json_decode(file_get_contents('php://input'), true);

$sdk = new NowPayments('API-KEY', false, 'YOUR-IPN-SECRET');
if ($sdk->verifyIPNSignature($payload, $receivedSig)) {
    // Payment is authentic!
}

Requirements

• PHP >= 7.4
• GuzzleHTTP ^7.0

License

MIT