Squarespace Inventory API

openapi: 3.1.0
info:
  title: Squarespace Inventory API
  description: >-
    The Squarespace Inventory API enables reading and adjusting stock information
    for product variants on a Squarespace merchant site. Developers can retrieve
    current inventory levels and apply incremental adjustments to stock quantities.
    This API is useful for integrating Squarespace with warehouse management systems,
    point-of-sale systems, or multi-channel inventory management platforms. Inventory
    adjustments can be applied in bulk across multiple product variants.
  version: '1.0'
  contact:
    name: Squarespace Developer Support
    url: https://developers.squarespace.com/commerce-apis/inventory-overview
  termsOfService: https://www.squarespace.com/terms-of-service
externalDocs:
  description: Squarespace Inventory API Documentation
  url: https://developers.squarespace.com/commerce-apis/inventory-overview
servers:
  - url: https://api.squarespace.com/1.0
    description: Production Server
tags:
  - name: Inventory
    description: Stock level retrieval and adjustment for product variants
security:
  - bearerAuth: []
paths:
  /commerce/inventory:
    get:
      operationId: listInventory
      summary: Retrieve All Inventory
      description: >-
        Returns real-time stock information for all product variants on the merchant
        site. The response contains up to 50 InventoryItem objects per page, with
        dynamic cursor-based pagination for iterating through all records. Each
        InventoryItem corresponds to a single product variant and includes its
        current stock quantity and tracking settings.
      tags:
        - Inventory
      parameters:
        - $ref: '#/components/parameters/cursor'
      responses:
        '200':
          description: Successful response with paginated list of inventory items
          content:
            application/json:
              schema:
                type: object
                properties:
                  inventory:
                    type: array
                    description: List of inventory items for product variants
                    items:
                      $ref: '#/components/schemas/InventoryItem'
                  pagination:
                    $ref: '#/components/schemas/Pagination'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '429':
          $ref: '#/components/responses/TooManyRequests'
  /commerce/inventory/{variantIds}:
    get:
      operationId: getInventoryByVariants
      summary: Retrieve Specific Inventory
      description: >-
        Retrieves real-time stock information for up to 50 specific product variants
        by their variant IDs. Variant IDs should be provided as a comma-separated
        list in the path. This endpoint is useful for checking stock levels on
        specific items without paginating through the full inventory.
      tags:
        - Inventory
      parameters:
        - $ref: '#/components/parameters/variantIds'
      responses:
        '200':
          description: Successful response with inventory items for the specified variants
          content:
            application/json:
              schema:
                type: object
                properties:
                  inventory:
                    type: array
                    description: Inventory items for the requested product variants
                    items:
                      $ref: '#/components/schemas/InventoryItem'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '404':
          $ref: '#/components/responses/NotFound'
        '429':
          $ref: '#/components/responses/TooManyRequests'
  /commerce/inventory/adjustments:
    post:
      operationId: adjustInventory
      summary: Adjust Stock Quantities
      description: >-
        Applies incremental stock quantity adjustments to one or more product variants.
        Adjustments are relative changes, not absolute values. Positive values increase
        stock and negative values decrease it. Bulk adjustments across multiple
        variants can be submitted in a single request. Each adjustment can optionally
        include a reason for audit tracking.
      tags:
        - Inventory
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AdjustInventoryRequest'
      responses:
        '200':
          description: Inventory adjustments applied successfully
          content:
            application/json:
              schema:
                type: object
                properties:
                  inventory:
                    type: array
                    description: Updated inventory items after adjustments were applied
                    items:
                      $ref: '#/components/schemas/InventoryItem'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '429':
          $ref: '#/components/responses/TooManyRequests'
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: >-
        Authenticate using an API key or OAuth access token. Include the token
        in the Authorization header as "Bearer YOUR_TOKEN".
  responses:
    BadRequest:
      description: The request was malformed or contained invalid parameters
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: Authentication credentials are missing or invalid
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Forbidden:
      description: The authenticated user does not have permission to access this resource
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    NotFound:
      description: The requested resource was not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    TooManyRequests:
      description: Rate limit exceeded
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  parameters:
    cursor:
      name: cursor
      in: query
      description: >-
        Pagination cursor from a previous response's pagination.nextPageCursor field.
        Omit or leave empty to retrieve the first page.
      required: false
      schema:
        type: string
    variantIds:
      name: variantIds
      in: path
      description: >-
        Comma-separated list of up to 50 product variant IDs for which to retrieve
        inventory information
      required: true
      schema:
        type: string
  schemas:
    InventoryItem:
      type: object
      description: Stock information for a single product variant
      properties:
        variantId:
          type: string
          description: Unique identifier of the product variant
        sku:
          type: string
          description: Stock keeping unit identifier for the variant
        descriptor:
          type: string
          description: Human-readable description of the variant including option values
        isUnlimited:
          type: boolean
          description: >-
            When true, the variant has unlimited stock and quantity values are
            not meaningful
        isTracked:
          type: boolean
          description: Whether stock tracking is enabled for this variant
        quantity:
          type: integer
          description: Current stock quantity available for the variant
          minimum: 0
        infiniteStock:
          type: boolean
          description: Alias for isUnlimited indicating the variant never goes out of stock
    AdjustInventoryRequest:
      type: object
      description: Request body for applying inventory adjustments
      required:
        - increments
      properties:
        increments:
          type: array
          description: List of inventory adjustments to apply
          items:
            $ref: '#/components/schemas/InventoryAdjustment'
    InventoryAdjustment:
      type: object
      description: A single stock quantity adjustment for a product variant
      required:
        - variantId
        - quantity
      properties:
        variantId:
          type: string
          description: Unique identifier of the product variant to adjust
        quantity:
          type: integer
          description: >-
            Relative quantity change to apply. Positive values increase stock,
            negative values decrease it.
    Pagination:
      type: object
      description: Pagination metadata included with list responses
      properties:
        hasNextPage:
          type: boolean
          description: Indicates whether additional pages of results are available
        nextPageCursor:
          type: string
          description: Cursor value to pass in the next request to retrieve the next page
        nextPageUrl:
          type: string
          format: uri
          description: Full URL for retrieving the next page of results
    Error:
      type: object
      description: Standard error response returned by the Squarespace API
      properties:
        type:
          type: string
          description: Machine-readable error type identifier
        subtype:
          type: string
          description: Optional more specific error subtype
        message:
          type: string
          description: Human-readable description of the error
        statusCode:
          type: integer
          description: HTTP status code associated with the error