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End-to-end secure payment processing gateway


Set up Account

Step 1: Create merchant account

To create an account send connection request at the or contact manager directly. Submit the required documents to verify your account and gain access.

Step 2: Get required credentials

Credentials that have to be issued:

  • Merchant ID
  • Secret Key

Connect Merchant Account

Step 1. Connect Merchant account at the Corefy Dashboard

Press Connect at GateExpress Provider Overview page in 'New connection' section and choose Merchant account option to open Connection form.


Enter credentials:

  • merchant_id → Merchant ID
  • secret_key → Secret Key


You have connected GateExpress Merchant account!

API examples:

Data set to create a transaction

POST /api/commerce/payment-invoices HTTP/1.1

  "data": {
    "type": "payment-invoice",
    "attributes": {
      "service": "payment_card_pln_hpp",
      "commerce_account": "Hello world",
      "currency": "PLN",
      "amount": 123.45,
      "flow": "charge",
      "customer": {
        "address": {
          "city": "Odessa",
          "full_address": "Pushkina 1",
          "post_code": "65001"
        "reference_id": "d123dqw312312",
        "name": "John Doe",
        "email": "[email protected]"
      "test_mode": false,
      "options": {
        "allow_partially": false
      "reference_id": "64d1671a-d0da-410d-8021-f5be51a160b6"

Still looking for help connecting your GateExpress account?

Please contact our support team!