# POST /credit/api/doPaymentFeeInquiry

**Resource:** [Transactions](../resources/Transactions.md)
**Service that queries fee information for payment transactions**
**Operation ID:** `doPaymentFeeInquiry`

Inquires the payment fee for a credit card transaction. Returns fee, BSMV, total commission, and transaction identifiers like UTID, RRN, and authorization code.

**Part of:**

- <a href="https://apiportal.dgpays.com/journeys/launch#s-credit" target="_parent">Journey 01 · Launching a new card product</a> — step 6, Post the first transaction

- <a href="https://apiportal.dgpays.com/journeys/manage#s-money" target="_parent">Journey 02 · Managing a card product</a> — step 1, Post and quote payments

## Request Body

Do Payment Fee Inquiry Request

**Required:** Yes

**Content Types:** `application/json`

**Schema:** [DoPaymentFeeInquiryRequest](../schemas/Do/DoPaymentFeeInquiryRequest.md)

## Responses

| Status | Description |
|--------|-------------|
| 200 | Success |
| 400 | (reference) |
| 404 | (reference) |
| 500 | (reference) |

**Success Response Schema:**

[DoPaymentFeeInquiryResponse](../schemas/Do/DoPaymentFeeInquiryResponse.md)

