---
title: "Attach a coupon to a Physical Card Order"
method: POST
path: "/api/v1/order/{orderId}/attach-coupon"
tags: ["Physical Card Order"]
---

# Attach a coupon to a Physical Card Order

`POST /api/v1/order/{orderId}/attach-coupon`

This endpoint associates a provided coupon code with an existing card order by its `orderId`. Use the `GPDOCS` coupon code to get the card for free.

## Path parameters

- `orderId` string, required

## Request body

- object
  - `couponCode` string, required — The coupon code to be applied to the order.

## Response `200`

Coupon successfully attached to the card order.

- object
  - `couponCode` string — The coupon code that was applied to the order.

## Other responses

- `401` — Unauthorized Error
- `404` — Card order not found.
- `422` — Coupon code is invalid.
- `500` — Internal server error.

---

[API](https://skmtc.net/gnosispay/apis/gnosispay-api.md) · [All operations](https://skmtc.net/gnosispay/apis/gnosispay-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/gnosispay/gnosispay-api/revisions/e0a09962c187/schema)