POST
/
api
/
v1
/
server-to-server-interface
/
refund
Refund a Transaction
curl --request POST \
  --url https://api-dev.paymentoptions.com/api/v1/api/v1/server-to-server-interface/refund \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '{
  "transactionId": "9dfd39ec-eb4a-4f8b-a526-17abf140a717",
  "amount": 1000,
  "merchant_id": "< Merchant ID >",
  "notes": "Refund amount captured/purchased"
}'
{
  "success": true,
  "status_code": 201,
  "is_live": false,
  "transaction_type": "REFUND",
  "gateway_response": {
    "version": "1",
    "type": "INFO",
    "message": "Amount successfully refunded.",
    "code": "INFO0002"
  },
  "merchant_details": {
    "legal_name": "Tink15 Factory",
    "mid": "< Merchant ID >",
    "merchant_txn_ref": "qwe"
  },
  "payment_details": {
    "amount": 1000,
    "response_code": 0,
    "auth_code": "264302",
    "currency": "JPY",
    "payment_method": "ECMC-SSL",
    "scheme": "MASTERCARD",
    "card": {
      "name": "John Doe",
      "number": "5200000000001005",
      "exp_month": "12",
      "exp_year": "24"
    },
    "additional_data": {
      "payment_data_source": {
        "type": "card"
      }
    }
  },
  "transaction_details": {
    "id": "626fa81d-9819-4947-bb9b-b0f11e00a50e",
    "ref": 74824,
    "timestamp": "2024-11-25T08:51:52.000Z",
    "merchant_txn_ref": "qwe"
  }
}

​
Key Points

  • The Refund API allows the merchant to reverse a transaction, sending the funds back to the customer’s payment method.
  • This API is typically used in scenarios such as order cancellations, product returns, or when a customer disputes a charge.
  • Refunds can be partial or full, depending on the amount specified in the refund request. If a partial amount is refunded, the remaining balance of the original transaction is still valid.

​
Flow diagram

Flow diagram image

​
Api Parameters

Authorizations

​
Authorization
string
header
required

API Key for Authorization. Format: 'Basic YOUR_API_KEY_HERE'

​
x-api-key
string
header
required

API Key specific to x-api-key.

Body

application/json

The request payload to refund a transaction.

​
transactionId
string
required

The original transaction ID of the authorized transaction.

Maximum length: 36
Example:

"9dfd39ec-eb4a-4f8b-a526-17abf140a717"

​
amount
integer
required

The amount to be refunded. This should not exceed the amount captured or purchased. Amount limit depends on the bank.

Example:

1000

​
merchant_id
string
required

The merchant ID (DASMID).

Maximum length: 10
Example:

"< Merchant ID >"

​
notes
string

The reference of the refund transaction (optional).

Maximum length: 128
Example:

"Refund amount captured/purchased"

Response

201 - application/json

Transaction refunded successfully

​
success
boolean

True on successful transaction, false on failure.

Example:

true

​
status_code
integer

The status code of the transaction.

Example:

201

​
is_live
boolean

True if live transaction, false if test transaction.

Example:

false

​
transaction_type
string

The transaction type (e.g., REFUND).

Example:

"REFUND"

​
gateway_response
object

A JSON object containing the response from the gateway.

​
merchant_details
object

A JSON object containing the details of the merchant.

​
payment_details
object

A JSON object containing the payment details of the transaction.

​
transaction_details
object

A JSON object containing details of the transaction.