> ## 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 a specific price adjustment information for a cart item > Update a specific price adjustment entity from the list of price adjustments made to a particular line item in a given cart. A price adjustment entity refers to a single object in the price adjustments array. ## OpenAPI ````yaml cart.openapi put /v3/carts/{cartId}/line-items/{lineItemId}/adjustments/{adjustmentId} openapi: 3.0.1 info: title: Cart 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 an 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). version: 3.0.0 x-audience: external-public contact: name: Cart Support email: support.cnc@fabric.inc license: name: fabric API License url: https://fabric.inc/api-license termsOfService: https://fabric.inc/terms-of-use servers: - url: https://api.fabric.inc/v3 description: Production security: - bearerAuth: [] tags: - name: Carts description: >- Carts endpoints let you perform basic cart operations, including finding, creating, updating, and merging carts. You can also apply or remove a promotion code to or from a cart. - name: Line Items description: >- Line Items endpoints let you perform basic line item operations, including creating, updating, and deleting line items in a cart. You can also get and update line item attributes and shipping details. - name: Shipping Details description: >- Shipping details endpoints let you get, create, and update cart shipping details. - name: Adjustments description: >- Using these endpoints, you can make adjustments to a cart or line items in a cart. externalDocs: description: Find out more about Cart url: https://developer.fabric.inc/v3/reference/cart-getting-started paths: /v3/carts/{cartId}/line-items/{lineItemId}/adjustments/{adjustmentId}: put: tags: - Adjustments summary: Update a specific price adjustment information for a cart item description: >- Update a specific price adjustment entity from the list of price adjustments made to a particular line item in a given cart. A price adjustment entity refers to a single object in the price adjustments array. operationId: updatePriceAdjustments parameters: - $ref: '#/components/parameters/cartId' - $ref: '#/components/parameters/lineItemId' - $ref: '#/components/parameters/adjustmentId' - $ref: '#/components/parameters/xFabricTenantId' - $ref: '#/components/parameters/xFabricChannelId' - $ref: '#/components/parameters/xFabricRequestId' requestBody: description: Sample request containing price adjustment details to be updated. content: application/json: schema: $ref: '#/components/schemas/priceAdjustmentPayload' required: true responses: '200': description: OK headers: x-fabric-request-id: $ref: '#/components/headers/xFabricRequestId' content: application/json: schema: $ref: '#/components/schemas/priceAdjustment' '400': description: Client error headers: x-fabric-request-id: $ref: '#/components/headers/xFabricRequestId' content: application/json: schema: $ref: '#/components/schemas/error400' '401': description: Unauthorized headers: x-fabric-request-id: $ref: '#/components/headers/xFabricRequestId' content: application/json: schema: $ref: '#/components/schemas/error401' '404': content: application/json: schema: oneOf: - $ref: '#/components/schemas/cartNotFound' - $ref: '#/components/schemas/lineItemNotFound' - $ref: '#/components/schemas/adjustmentNotFound' description: Not found headers: x-fabric-request-id: $ref: '#/components/headers/xFabricRequestId' '500': description: Internal server error headers: x-fabric-request-id: $ref: '#/components/headers/xFabricRequestId' content: application/json: schema: $ref: '#/components/schemas/error500' components: parameters: cartId: name: cartId in: path description: Cart ID required: true schema: type: string example: b8a64b52-dab4-8137-8d6a-f2c2337abc1 lineItemId: name: lineItemId in: path description: Line item ID required: true schema: type: string example: d7e78a21-bee3-4448-bf1c-d5b5461dbda2 adjustmentId: name: adjustmentId in: path description: Price adjustment identifier required: true schema: type: string example: d7e78a21-bee3-4448-bf1c-d5b5461dbda2 xFabricTenantId: in: header name: x-fabric-tenant-id 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. schema: type: string example: 617329dfd5288b0011332311 required: true xFabricChannelId: in: header name: x-fabric-channel-id description: >- x-fabric-channel-id identifies the sales channel where the API request is being made; primarily for multichannel use cases. The channel ids are 12 corresponding to US and 13 corresponding to Canada. The default channel id is 12. This field is required. schema: type: string example: '12' required: false xFabricRequestId: in: header name: x-fabric-request-id description: Unique request ID schema: type: string example: 263e731c-45c8-11ed-b878-0242ac120002 required: false schemas: priceAdjustmentPayload: description: Price adjustment details required: - amount - reason type: object properties: amount: type: number description: >- Amount to be adjusted with the specified line item's total amount or with a specified cart's total amount format: double example: 60.5 reason: type: string description: Price adjustment reason example: CSR Adjustment attributes: type: object additionalProperties: anyOf: - type: string - type: number - type: boolean description: Placeholder for additional information nullable: true example: productFamily: Laptop computers priceAdjustment: description: >- Price adjustment details for the specified line item or the specified cart required: - id - amount - reason type: object properties: id: type: string description: >- Price adjustment ID; it identifies a single price adjustment object within the price adjustments array. example: c695af14-5e33-402c-9d8d-71edcf4856a8 nullable: false amount: type: number description: >- Amount by which the line item's total amount or the specified cart's total amount is adjusted format: double example: 60.5 reason: type: string description: Price adjustment reason example: CSR Adjustment attributes: type: object additionalProperties: anyOf: - type: string - type: number - type: boolean description: Placeholder for additional information nullable: true example: productFamily: Laptop computers createdAt: allOf: - $ref: '#/components/schemas/baseTime' - description: Time cart was created nullable: true updatedAt: allOf: - $ref: '#/components/schemas/baseTime' - description: Time cart was last updated nullable: true error400: type: object description: Bad request error properties: type: description: Error code type: string example: BAD_REQUEST message: description: Error description type: string example: Bad Request error401: type: object description: Unauthorized properties: type: description: Error code type: string example: UNAUTHORIZED message: description: Error description type: string example: Unauthorized User cartNotFound: type: object description: Cart not found error properties: type: description: Error code type: string example: NOT_FOUND message: description: Error description type: string example: Cart not found lineItemNotFound: type: object description: Line item not found error properties: type: description: Error code type: string example: NOT_FOUND message: description: Error description type: string example: >- Line item was not found with id: dd23f254-ba28-420c-8dad-fe2f4477fe68 adjustmentNotFound: type: object description: Price adjustment not found error properties: type: description: Error code type: string example: NOT_FOUND message: description: Error description type: string example: >- Price Adjustment was not found with id: dd23f254-ba28-420c-8dad-fe2f4477fe68 error500: type: object description: Internal server error properties: type: description: Error code type: string example: INTERNAL_SERVER_ERROR message: description: Error description type: string example: Internal server error baseTime: description: Date time in ISO-8601 format type: string format: date-time example: '2022-09-06T14:07:17.000Z' headers: xFabricRequestId: description: Unique request ID schema: type: string example: 263e731c-45c8-11ed-b878-0242ac120002 required: false securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: JWT ````