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1. Create Checkout Session

Initialize a new payment by sending order details to our API.

HTTP Request
$payload = [
    'amount' => '100.00',
    'currency' => 'USD',
    'order_id' => 'ORD-99'
];

$response = atrium_api_call('/checkout', $payload);
const atrium = require('atrium-pay');

const session = await atrium.checkout.create({
    amount: '100.00',
    currency: 'USD',
    order_id: 'ORD-99'
});
import atrium

session = atrium.Checkout.create(
    amount='100.00',
    currency='USD',
    order_id='ORD-99'
)
params := &atrium.CheckoutParams{
    Amount:   "100.00",
    Currency: "USD",
    OrderID:  "ORD-99",
}

session, _ := checkout.New(params)
API Response (JSON)
{
    "status": "success",
    "payment_url": "https://pay.atriumpay.com/xH82j...",
    "token": "tok_live_abc123",
    "expires_at": 1710934567
}

2. Handle Webhook Callback

Securely receive payment notifications on your server.

Webhook Payload (POST)
{
    "event": "payment.completed",
    "order_id": "ORD-99",
    "amount_received": 100.00,
    "hash": "0x..."
}
Your Server Response
// Return 200 OK
http_response_code(200);
echo json_encode(["received" => true]);
// Return 200 OK
res.status(200).send({
    received: true
});
# Return 200 OK
return jsonify({"received": True}), 200
// Return 200 OK
w.WriteHeader(http.StatusOK)
json.NewEncoder(w).Encode(map[string]bool{
    "received": true,
})