Use Case: Nagad (Bangladesh)

Collect a payment via Nagad using the unified Initiate and Inquire APIs.

Setting	Value
Region	`BD`
Operator	`10002`
Currency	`BDT`

Initiate

Same request as bKash. Set operatorId header and body operator to 10002. Bangladesh uses operator in request and response; all other unified regions use operatorId.

curl --location 'https://sandbox.simpaisa.com/payins/payments/initiate' \
  --header 'api-token: YOUR_API_TOKEN' \
  --header 'Content-Type: application/json' \
  --header 'mode: payin' \
  --header 'region: BD' \
  --header 'operatorId: 10002' \
  --header 'version: 3.0' \
  --data '{
    "merchantId": "4000000",
    "operator": "10002",
    "msisdn": "1812345678",
    "amount": "20.00",
    "userKey": "order-22223453",
    "successUrl": "https://merchant.example/success",
    "failureUrl": "https://merchant.example/failure",
    "productReference": "Top-up"
  }'

Redirect the customer to payment_url from the response, then call Inquire.

Initiate​

Initiate