--- title: Update Item Quantity slug: api-documentation/update-item-quantity docTags: createdAt: 2026-08-27T16:53:32.339Z --- { "id": "_PZ4eCfmwfn_6NVqkzPXR", "type": "api-oas-v2", "data": { "method": "PATCH", "url": "https://api.upstartcommerce.com/v1/cart/{customerId}/cart/items/{itemId}", "servers": [ { "url": "https://api.upstartcommerce.com/v1/cart/{customerId}/cart/items/{itemId}" } ], "name": "Update Item Quantity", "description": "This endpoint allows administrators to update the quantity of the indicated item in the consumer's current cart.", "contentType": "application/json", "request": { "pathParameters": [ { "kind": "required", "name": "itemId", "type": "string", "description": "Unique identifier of the cart item." }, { "kind": "required", "name": "customerId", "type": "string", "description": "Unique identifier representing the \"owner\" of the cart." } ], "headerParameters": [ { "name": "accept", "type": "string", "kind": "optional", "description": "Generated from available response content types", "enum": [ "application/json" ], "default": "application/json" }, { "kind": "required", "name": "x-upstart-tenant", "type": "string", "description": "Tenant identifier associated with the site this call is for." }, { "kind": "required", "name": "x-upstart-site", "type": "string", "description": "The site identifier." } ], "queryParameters": [], "bodyDataParameters": [ { "kind": "required", "name": "body", "type": "object", "description": "The JSON structure required to update the quantity of an item already in the cart.", "customType": "UpdateCartItemQuantity", "schema": [ { "name": "quantity", "kind": "required", "type": "integer", "description": "", "format": "int32" } ], "modelRef": "#/components/schemas/UpdateCartItemQuantity", "isExpanded": true } ], "formDataParameters": [], "oAuthParameters": [ { "id": "NoChannelPortalAccess", "name": "NoChannelPortalAccess", "kind": "optional", "type": "http", "description": "

This authentication is required for clients to interact with any of the management APIs. Similar to 'LoggedIn', it indicates that the user has actually logged into the system, but in this case with a management role.

", "scheme": "bearer" } ], "cookieParameters": [] }, "responses": [ { "statusCode": "202", "description": "

Success-the item's quantity was updated.

", "jsonExample": "", "isExpanded": true, "schema": [ { "kind": "optional", "type": "object", "description": "This holds the id of the cart and the item that was updated.", "customType": "CartItemUpdated", "schema": [ { "name": "id", "kind": "required", "type": "string", "description": "Unique identifier of the updated cart.", "format": "uuid" }, { "name": "itemId", "kind": "required", "type": "string", "description": "Unique identifier of the updated item.", "format": "uuid" } ], "modelRef": "#/components/schemas/CartItemUpdated", "isExpanded": true } ] }, { "statusCode": "400", "description": "The request contained information that the server was unable to process. Appropriate errors are provided in the response body.", "jsonExample": "", "isExpanded": true, "schema": [ { "kind": "optional", "type": "object", "description": "", "customType": "ValidationErrorResponse", "schema": [ { "name": "name", "kind": "required", "type": "string", "description": "" }, { "name": "code", "kind": "required", "type": "string", "description": "" }, { "name": "detail", "kind": "optional", "type": "string", "description": "" } ], "modelRef": "#/components/schemas/ValidationErrorResponse", "isExpanded": true } ] }, { "statusCode": "401", "description": "The provided credentials were not valid for this endpoint. It may be that they are expired or that the user's roles are insufficient.", "jsonExample": "", "isExpanded": true, "schema": [ { "kind": "optional", "type": "object", "description": "", "customType": "ErrorResponse", "schema": [ { "name": "name", "kind": "required", "type": "string", "description": "" }, { "name": "code", "kind": "required", "type": "string", "description": "" }, { "name": "detail", "kind": "required", "type": "string", "description": "" }, { "name": "reason", "kind": "optional", "type": "string", "description": "" } ], "modelRef": "#/components/schemas/ErrorResponse", "isExpanded": true } ] }, { "statusCode": "404", "description": "The requested resource was not found in the NoChannel system.", "jsonExample": "", "isExpanded": true, "schema": [ { "kind": "optional", "type": "object", "description": "", "customType": "ErrorResponse", "schema": [ { "name": "name", "kind": "required", "type": "string", "description": "" }, { "name": "code", "kind": "required", "type": "string", "description": "" }, { "name": "detail", "kind": "required", "type": "string", "description": "" }, { "name": "reason", "kind": "optional", "type": "string", "description": "" } ], "modelRef": "#/components/schemas/ErrorResponse", "isExpanded": true } ] } ], "hasXCodeSamples": false, "examples": { "languages": [ { "id": "7wMW480JA8cKm_klT_KTt", "language": "curl", "label": "cURL", "code": "curl --request PATCH \\\n --url https://api.upstartcommerce.com/v1/cart/{customerId}/cart/items/{itemId} \\\n --header 'accept: application/json' \\\n --header 'content-type: application/json' \\\n --header 'x-upstart-tenant: string' \\\n --header 'x-upstart-site: string' \\\n --data '{\n \"quantity\": \"\"\n }'" }, { "id": "Yje-38EaVtPAO1cwvMu6R", "language": "javascript", "label": "javascript", "code": "var myHeaders = new Headers();\nmyHeaders.append(\"accept\", \"application/json\");\nmyHeaders.append(\"content-type\", \"application/json\");\nmyHeaders.append(\"x-upstart-tenant\", \"string\");\nmyHeaders.append(\"x-upstart-site\", \"string\");\n\nvar raw = JSON.stringify({\n \"quantity\": \"\"\n});\n\nvar requestOptions = {\n method: 'PATCH',\n headers: myHeaders,\n body: raw,\n redirect: 'follow'\n};\n\nfetch(\"https://api.upstartcommerce.com/v1/cart/{customerId}/cart/items/{itemId}\", requestOptions)\n .then(response => response.text())\n .then(result => console.log(result))\n .catch(error => console.log('error', error));" }, { "id": "73aWYReWITNcpEAxyhoNO", "language": "ruby", "label": "Ruby", "code": "require \"uri\"\nrequire \"json\"\nrequire \"net/http\"\n\nurl = URI(\"https://api.upstartcommerce.com/v1/cart/{customerId}/cart/items/{itemId}\")\n\nhttps = Net::HTTP.new(url.host, url.port)\nhttps.use_ssl = true\n\nrequest = Net::HTTP::Patch.new(url)\nrequest[\"accept\"] = \"application/json\"\nrequest[\"content-type\"] = \"application/json\"\nrequest[\"x-upstart-tenant\"] = \"string\"\nrequest[\"x-upstart-site\"] = \"string\"\nrequest.body = JSON.dump({\n \"quantity\": \"\"\n})\n\nresponse = https.request(request)\nputs response.read_body\n" }, { "id": "EGjRKbsxkinlcyP0cxVoq", "language": "python", "label": "Python", "code": "import requests\nimport json\n\nurl = \"https://api.upstartcommerce.com/v1/cart/{customerId}/cart/items/{itemId}\"\n\npayload = json.dumps({\n \"quantity\": \"\"\n})\nheaders = {\n 'accept': 'application/json',\n 'content-type': 'application/json',\n 'x-upstart-tenant': 'string',\n 'x-upstart-site': 'string'\n}\n\nresponse = requests.request(\"PATCH\", url, headers=headers, data=payload)\n\nprint(response.text)\n" } ], "selectedLanguageId": "7wMW480JA8cKm_klT_KTt" }, "results": { "languages": [ { "id": "LoCRQ7PQbD6XuwA1JQnPf", "language": "202", "code": "// Success-the item's quantity was updated.\n{\n \"id\": \"\",\n \"itemId\": \"\"\n}" }, { "id": "B6izVN2BfsOZPXNDydxHN", "language": "400", "code": "// The request contained information that the server was unable to process. Appropriate errors are provided in the response body.\n{\n \"name\": \"\",\n \"code\": \"\",\n \"detail\": \"\"\n}" }, { "id": "ob4e5nHXyH4KYYWrKXknp", "language": "401", "code": "// The provided credentials were not valid for this endpoint. It may be that they are expired or that the user's roles are insufficient.\n{\n \"name\": \"\",\n \"code\": \"\",\n \"detail\": \"\",\n \"reason\": \"\"\n}" }, { "id": "yBYOjdcBz08fSdqr2m5iW", "language": "404", "code": "// The requested resource was not found in the NoChannel system.\n{\n \"name\": \"\",\n \"code\": \"\",\n \"detail\": \"\",\n \"reason\": \"\"\n}" } ], "selectedLanguageId": "LoCRQ7PQbD6XuwA1JQnPf" } }, "children": [ { "text": "" } ] }