> Agent-readable docs index: /llms.txt. Download /docs.zip to grep all markdown files locally.

---
title: "CartBuyerIdentityUpdateInput"
description: "The input fields to provide the necessary information to update the buyer identity associated with a cart through the `updateCartBuyerIdentity` mutation. By providing the cart ID and the updated buyer identity information, the API can update the cart's buyer identity accordingly."
---

## Fields

<ParamField path="id" type="ID!" required>
  The ID of the cart that the user wants to update the buyer identity for.
</ParamField>

<ParamField path="buyerIdentity" type={<a href="/api-reference/buyeridentityinput">BuyerIdentityInput</a>}>
  The `BuyerIdentityInput` object containing the updated buyer identity information.
</ParamField>

## Mutations

* [`updateCartBuyerIdentity`](/api-reference/updatecartbuyeridentity)

## Related types

* [`BuyerIdentityInput`](/api-reference/buyeridentityinput)
* [`CartResponse`](/api-reference/cartresponse)


---

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