> ## Documentation Index > Fetch the complete documentation index at: https://developer.fabric.inc/llms.txt > Use this file to discover all available pages before exploring further. # Update address > Updates the billing address associated with the corresponding cart. The Cart ID from the [Create cart](/v3/cart-and-checkout/api-reference/carts-v3/carts/carts) endpoint is used in the path parameter. The Address ID from the [Create address](/v3/cart-and-checkout/api-reference/carts-v3/addresses/create-addresses) endpoint is used in the path parameter. ## OpenAPI ````yaml modular-cart patch /carts/{cartId}/addresses/{addressId} openapi: 3.0.1 info: title: Cart API description: >- fabric's **Cart API** lets you add, update, and remove items from your Storefront cart, either as a guest user or as a logged-in user. It also provides functionality to merge carts when you switch from guest user to logged-in user, and apply coupons and other attributes (for example, gift wrapping) to the line items. Additionally, the API supports more advanced tasks such as using multiple carts within a B2B organization, sharing carts, and supporting a unified cart experience for multi-region and multi-brand businesses.

The Cart API provides high performance, scalability, multi-tenancy, and configurability to the end-to-end order processing actions that start from the item being added to the cart; through the pre-checkout stage that includes billing, shipping, and payment details; to the checkout stage where the order is processed and confirmed by fabric's Order Management System (OMS) contact: name: Cart Support email: support.cnc@fabric.inc license: name: fabric API License url: https://fabric.inc/api-license version: 3.0.0 servers: - url: https://api.fabric.inc/v3 security: - bearerAuth: [] tags: - name: Cart description: >- Cart endpoints are used to do basic cart operations, such as create a cart, add item to the corresponding cart, update items, remove items, delete cart, update status of the cart, and more. - name: Items description: Item endpoints are used to add, update and remove items from the Cart. - name: Cart Fees description: >- Cart fee endpoints are used to add, update and remove fees at the Cart level. - name: Fulfillment Fees description: >- Fulfillment fees endpoints are used to add, update and remove fees at the Fulfillment level. - name: Addresses description: >- Address endpoints are used to add add, update and remove addresses from the Cart. - name: Item Fees description: >- Item fee endpoints are used to add, update and remove fees at the Item level. - name: Cart Adjustments description: >- Cart adjustment endpoints are used to add, update and remove adjustments at the Cart level. - name: Payments description: >- Payments endpoints are used to add add, update and remove payments from the Cart. - name: Customer description: >- Customer endpoints are used do basic customer operations, such as update a customer, add attributes and more. - name: Coupons description: Coupon endpoints are used to add and remove coupons from the Cart - name: Item Adjustments description: >- Item adjustments endpoints are used to add, update and remove adjustments at the Item level. - name: Fulfillment Adjustments description: >- Fulfillment adjustments endpoints are used to add, update and remove adjustments at the Fulfillment level. - name: Fulfillments description: >- Fulfillment endpoints are used to add add, update and remove fulfillments from the Cart. - name: Validations description: >- Validation endpoints are used to pass in data from fabric and third-party services to perform business logic on the Cart paths: /carts/{cartId}/addresses/{addressId}: patch: tags: - Addresses summary: Update address description: > Updates the billing address associated with the corresponding cart. The Cart ID from the [Create cart](/v3/cart-and-checkout/api-reference/carts-v3/carts/carts) endpoint is used in the path parameter. The Address ID from the [Create address](/v3/cart-and-checkout/api-reference/carts-v3/addresses/create-addresses) endpoint is used in the path parameter. operationId: updateAddress parameters: - name: cartId in: path required: true schema: type: string description: >- The 24-character system-generated Cart ID. This ID is generated using the [Create cart](/v3/cart-and-checkout/api-reference/carts-v3/carts/carts) endpoint. - name: addressId in: path required: true schema: type: string description: >- The Address ID that was generated when an address was created using the [Create address](/v3/cart-and-checkout/api-reference/carts-v3/addresses/create-addresses) endpoint. - name: x-fabric-tenant-id in: header description: > A header used by fabric to identify the tenant making the request. You must include tenant id in the authentication header for an API request to access any of fabric’s endpoints. You can retrieve the tenant id , which is also called account id, from [Copilot](/v3/platform/settings/account-details/getting-the-account-id). This header is required. required: true schema: type: string example: 617329dfd5288b0011332311 - name: x-fabric-request-id in: header description: ' Unique request ID for tracking.' required: false schema: type: string example: 263e731c-45c8-11ed-b878-0242ac120002 - name: x-fabric-channel-id in: header description: >- x-fabric-channel-id identifies the sales channel through which the API request is being made; primarily for multichannel use cases. It is a required field. The default US channel is 12 while the default Canada channel is 11. required: false schema: type: string example: '12' requestBody: content: application/json: schema: $ref: '#/components/schemas/UpdateAddressRequest' required: true responses: '200': description: OK content: application/json: schema: $ref: '#/components/schemas/Address' '400': description: Client error content: application/json: schema: $ref: '#/components/schemas/ClientError' '404': description: Cart not found content: application/json: schema: $ref: '#/components/schemas/NotFound' components: schemas: UpdateAddressRequest: type: object properties: name: $ref: '#/components/schemas/ForUpdate' email: type: string description: Email example: john@test.com phone: $ref: '#/components/schemas/ForUpdate' addressLine1: type: string description: Address line 1 example: 123 Park Road addressLine2: type: string description: Address line 2 addressLine3: type: string description: Address line 3 addressLine4: type: string description: Address line 4 city: type: string description: City example: Santa Cruz region: type: string description: State, Province or Area example: California country: type: string description: Country example: USA postalCode: type: string description: Postal code or zip code example: '12345' description: Address Address: type: object properties: id: type: string description: >- The Address ID generated when an address was created using the [Create address](/v3/cart-and-checkout/api-reference/carts-v3/addresses/create-addresses) endpoint. example: a8577d7f-0d4d-4b22-8e85-7b4a2e90dc93 name: $ref: '#/components/schemas/Name' email: type: string description: Email example: john@test.com phone: $ref: '#/components/schemas/Phone' addressLine1: type: string description: Address line 1 example: 123 Park Road addressLine2: type: string description: Address line 2 addressLine3: type: string description: Address line 3 addressLine4: type: string description: Address line 4 city: type: string description: City example: Santa Cruz region: type: string description: State, Province or Area example: California country: type: string description: Country example: USA postalCode: type: string description: Postal code or zip code example: '12345' updatedAt: type: string description: The date and time the address was last updated. example: '2024-06-13T16:50:00.682Z' createdAt: type: string description: The date and time the address was created. example: '2024-06-13T16:50:00.682Z' description: Address ClientError: type: object properties: type: type: string description: Error code, meant for machine consumption example: BAD_REQUEST message: type: string description: Human-readable error description example: x-fabric-tenant-id is required description: Client error details NotFound: type: object properties: type: type: string description: Error code, meant for machine consumption example: CART_NOT_FOUND message: type: string description: Human-readable error description example: Cart not found description: Resource Not Found ForUpdate: type: object properties: number: type: string description: Phone Number example: 123-456-7890 type: type: string description: Phone Number Type example: MOBILE enum: - MOBILE - BUSINESS - HOME Name: type: object properties: first: type: string description: First name example: John middle: type: string description: Middle name example: S last: type: string description: Last name example: Doe description: Name of the recipient of the order. Phone: type: object properties: number: type: string description: Phone Number example: 123-456-7890 type: type: string description: Phone Number Type example: MOBILE enum: - MOBILE - BUSINESS - HOME description: Phone securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: JWT description: > This is the authorization token used to authenticate the request. You must pass the access token generated from the system app. For more information, see the [Making your first API request](/v3/api-reference/getting-started/getting-started-with-fabric-apis#procedure) section. ````