> For the complete documentation index, see [llms.txt](https://docs.ottpay.com/payment-api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ottpay.com/payment-api/retail-api/query-transaction-api.md).

# Query Transaction API

## :white\_check\_mark: **Query Transaction API**

:ballot\_box\_with\_check: **Request Message Parameters**

| **Params Name** | **Description**  | **Required** | **Notes**     |   |
| --------------- | ---------------- | ------------ | ------------- | - |
| action          | Response code    | Y            | STATUS\_QUERY |   |
| version         | Response message | Y            | 1.0           |   |
| merchant\_id    | Merchant ID      | Y            |               |   |
| data            | order\_id        | Order ID     | Y             |   |
| md5             | Message digest   | Y            |               |   |

:ballot\_box\_with\_check: **Response Message Parameters**

| **Params Name**  | **Description**         | **Required** | **Notes**                       |
| ---------------- | ----------------------- | ------------ | ------------------------------- |
| rsp\_code        | Response code           | Y            | Please refer to Appendix B      |
| rsp\_msg         | Response message        | Y            |                                 |
| data             | order\_status           | Order status | Y                               |
| trade\_time      | Transaction time        | N            |                                 |
| order\_id        | Order ID                | N            |                                 |
| buyer\_login\_id | Buyer ID                | N            |                                 |
| total\_amount    | Order total amount      | N            | String, "100" for  1.00 dollar  |
| receive\_amount  | Merchant receive amount | N            | String, "100" for  1.00 dollar  |
| pay\_amount      | User pay amount         | N            | String, "100" for  1.00 dollar  |
| refund\_fee      | Refund fee              | N            | Only exist for a refunded order |
| md5              | Message digest          | Y            |                                 |


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