---
updatedAt: 2026-05-25T16:56:31.000Z
agentTools:
  projectIndex: https://developers.fairmarkit.com/llms.txt
---

# Update Price Book Item

Updates a price book item.

# OpenAPI definition

```json
{
  "openapi": "3.1.1",
  "servers": [
    {
      "url": "https://staging.fairmarkit.com/"
    }
  ],
  "info": {
    "title": "BUYER PUBLIC API",
    "version": "3",
    "description": "The Fairmarkit Buyer API is a RESTful API that uses HTTP requests to allow you to access and use your Fairmarkit data. It has predictable resource-oriented URLs that use standard HTTP response codes, authentication, and verbs. See the Fairmarkit API developer portal for more information.",
    "termsOfService": "https://www.fairmarkit.com/terms-of-service",
    "contact": {
      "name": "Fairmarkit Support",
      "url": "https://fmkt.zendesk.com/hc/en-us",
      "email": "support@fairmarkit.com"
    }
  },
  "paths": {
    "/services/self-service/api/v4/price-books/{price_book_id}/items/{item_id}": {
      "patch": {
        "tags": [
          "Price Books"
        ],
        "summary": "Update Price Book Item",
        "description": "Updates a price book item.",
        "operationId": "update_price_book_item_services_self_service_api_v4_price_books__price_book_id__items__item_id__patch",
        "parameters": [
          {
            "description": "The UUID or External ID of the price book to update the item in.",
            "required": true,
            "schema": {
              "type": "string",
              "title": "Price Book Id"
            },
            "name": "price_book_id",
            "in": "path"
          },
          {
            "description": "The UUID or External ID of the price book item to update.",
            "required": true,
            "schema": {
              "type": "string",
              "title": "Item Id"
            },
            "name": "item_id",
            "in": "path"
          },
          {
            "description": "Fairmarkit API Key",
            "required": false,
            "schema": {
              "type": "string",
              "title": "X-Fm-Api-Key"
            },
            "name": "X-FM-API-KEY",
            "in": "header"
          }
        ],
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/UpdatedPriceBookItemV4"
              }
            }
          },
          "required": true
        },
        "responses": {
          "200": {
            "description": "Successful Response",
            "content": {
              "application/json; charset=utf-8": {
                "schema": {
                  "$ref": "#/components/schemas/CreatePriceBookItemResponseV4"
                }
              }
            }
          },
          "422": {
            "description": "Validation Error",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/HTTPValidationError"
                }
              }
            }
          }
        }
      }
    }
  },
  "components": {
    "schemas": {
      "HTTPValidationError": {
        "title": "HTTPValidationError",
        "type": "object",
        "description": "Validation error response.",
        "properties": {
          "detail": {
            "title": "Detail",
            "type": "array",
            "description": "Details about a specific error to display in error response.",
            "items": {
              "$ref": "#/components/schemas/ValidationError"
            }
          }
        }
      },
      "ValidationError": {
        "title": "ValidationError",
        "required": [
          "loc",
          "msg",
          "type"
        ],
        "type": "object",
        "description": "Details for a validation error.",
        "properties": {
          "loc": {
            "title": "Location",
            "type": "array",
            "description": "Error location",
            "items": {
              "anyOf": [
                {
                  "type": "string"
                },
                {
                  "type": "integer"
                }
              ]
            }
          },
          "msg": {
            "title": "Message",
            "type": "string",
            "description": "Human readable explanation of the error."
          },
          "type": {
            "title": "Error Type",
            "type": "string",
            "description": "Computer-readable identifier of the error type."
          }
        }
      },
      "CreatePriceBookItemResponseV4": {
        "properties": {
          "id": {
            "type": "string",
            "format": "uuid",
            "title": "Id",
            "description": "The unique identifier of the created price book item."
          }
        },
        "type": "object",
        "required": [
          "id"
        ],
        "title": "CreatePriceBookItemResponse"
      },
      "UpdatedPriceBookItemV4": {
        "properties": {
          "value": {
            "type": "object",
            "title": "Value",
            "description": "The value data of the price book item."
          },
          "custom_tags": {
            "additionalProperties": {
              "type": "array",
              "items": {}
            },
            "type": "object",
            "title": "Custom Tags",
            "description": "Custom tags associated with the price book item."
          },
          "external_id": {
            "type": "string",
            "title": "External Id"
          }
        },
        "type": "object",
        "required": [
          "value"
        ],
        "title": "UpdatedPriceBookItem"
      }
    }
  },
  "x-readme": {
    "explorer-enabled": true,
    "proxy-enabled": true,
    "samples-enabled": true
  }
}
```