Dashboard Overview
Checking Xero...
Auto-Sync Activ (30s)
Total Invoices
0
0 Paid • 0 Pending
Total Volume
£0.00
£0.00 Paid • £0.00 Pending
Active API Keys
0
0 connected websites
Xero Status
Connecting...
Direct API Ready
Recent Invoices & Crezco Links
Real-time payment requests generated by external stores
Order Ref Store / Site Customer Amount Xero Invoice # Direct Crezco Link Payment Status Quick Action Created At
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Instant Invoice & Crezco Link Generator
Test the live workflow: creates contact & invoice in Xero, launches headless Chrome to resolve Crezco pay URL, and returns checkout link
API Keys for External Stores
Manage API credentials for external ecommerce websites and partner channels
Store / Channel API Key Token Total Invoices Status Last Used Actions
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All Gateway Invoices
Complete audit log of all generated invoices and payment statuses
Auto-Sync (30s): Activ
ID Store Order Ref Customer Amount Xero # Method Payment Links Status Actions Date
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X
Xero OAuth 2.0
Disconnected
Not Connected
No organization linked yet
Scopes: ✓ Invoices ✓ Payments ✓ Contacts ✓ Settings ✓ Offline Access
API Credentials & Settings
Update Client ID, Secret and invoice template. Save first, then click Authorize.
Encrypted & Secured
#{order_id} {buyer_name} {site_name}
After saving, click Authorize / Reconnect above to complete OAuth flow.
1️⃣
Save Credentials
Enter Client ID & Secret then hit Save Settings
2️⃣
Authorize on Xero
Click Authorize / Reconnect and approve on Xero
3️⃣
Auto-Synced
Invoices & payments sync automatically every 30s
💳
Revolut Merchant API
Checking...
Card payments · Apple Pay · Google Pay · Revolut Pay
Accepts: ✓ Visa ✓ Mastercard ✓ Apple Pay ✓ Google Pay ✓ Revolut Pay
API Credentials
Configure your Revolut Merchant API keys. Keys are encrypted and stored securely.
Changes apply immediately after save.
💳
Card Payments
Customers pay with Visa/Mastercard directly on your checkout
📱
Apple & Google Pay
One-tap payments on mobile devices, no card entry needed
🔄
Auto Sync Xero
Invoice marked paid in Xero automatically after card payment
Integration Guide & Code Snippets
How to integrate external websites with this Payment Gateway via REST API

1. Endpoint: Create Payment Invoice

Send a POST request with your API Key to generate an instant Crezco checkout link.

POST https://payment.onlineservicegateway.com/api/gateway/invoices 
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2. Expected JSON Response

{
  "ok": true,
  "status": "success",
  "id": 104,
  "siteName": "Main Platform",
  "externalOrderId": "ORD-58192",
  "invoiceNumber": "INV-MAIN-ORD58192",
  "paymentUrl": "https://app.crezco.com/pay/cFd89qtAmUiyoTczedAMiQ",
  "crezcoUrl": "https://app.crezco.com/pay/cFd89qtAmUiyoTczedAMiQ",
  "xeroOnlineUrl": "https://in.xero.com/00192a-uuid-link",
  "amount": 1250,
  "currency": "GBP"
}