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⚠️ Support Advisory: WooCommerce Zapier Version 1 Shutdown on 14 October 2024. Current Version Remains Fully Operational.

Product

You can send Products data to Zapier, or you can create or update products from an external source.

Product Types

WooCommerce comes with multiple types of products out of the box. Please consult the following tables for details.

Extensions can extend available data and introduce other product types. Please see the Plugin Compatibility chapter for details.

Integration Functionality by Product Type

Product type Triggers Actions and Searches Order Context1
Simple product Yes Yes Yes
Grouped product Yes Yes N/A
External/Affiliate product Yes Yes N/A
Variable product Yes Yes Yes
Bookable product2 Yes Yes Yes
Simple subscription3 Yes Yes Yes
Variable subscription3 Yes Yes Yes

Data Availability by Product Type

Product type Inventory Shipping Attributes Variations
Simple product Yes Yes Yes N/A
Grouped product N/A N/A Yes N/A
External/Affiliate product N/A N/A Yes N/A
Variable product Yes Yes Yes Yes
Bookable product2 N/A Yes Yes N/A
Simple subscription3 Yes Yes Yes N/A
Variable subscription3 Yes Yes Yes Yes

Product Data in Order Context

While every order contains one or more products as a line item, not all product data is included by default. Please compare the Order Data Structure or Line Item in an Order Data Structure with the Product Data Structure above for availability. If you need additional product data fields while working with an Order, consider adding a Find Product step to your Zap.

Variable Products

In WooCommerce, a product with variable attributes is constructed as multiple interconnected products. The parent product that connects everything and holds shared information, which you can edit in the WooCommerce dashboard, has a variable product type. For each variation, a separate product is created and stored as a product variation. This latter product holds selected attributes for the variable product. For example, an individual product variation has a price, SKU or stock level information for a particular attribute.

In the Zapier interface, you can see IDs of linked variations in the variations field for a variable product. On the other hand, the variable product ID is visible in the parent_id field for a product variation.

Please note, that you can’t edit a variation name directly in the WooCommerce dashboard. Instead, the name is automatically constructed with the used product attributes and the selected values.

Sending or Receiving a Variable Product

v2.6

Triggers are supported for variable products as well as their product variations. They do not behave differently from any other supported product type.

When using the Product created or Product updated trigger rules with a variable product, every individual variation will be sent as a separate task alongside the parent product task.

Actions are also supported for individual variations. I.e., you can create, update and search for a variable product, as well as its individual product variations.

Variable Products as Order Line Item

In Order Triggers, when a line item represents a variable product, WooCommerce combines field data from the parent and the selected variation. While the line_itemsproduct_id (and some other field sources) are the variable product, most of the information is selected from the used product variation. For example, the actual used product ID is visible in the line_itemsvariation_id.

For Order Actions or Searches, you can add a variable product to an order as long you know the ID or SKU of a variation and the product already exists in your WooCommerce store.

If you want to use Zapier to create an order in WooCommerce for a variable product, consider using the individual variation’s SKU rather than variation ID.

Notable Order Field Sources
Field Source
Line Items → Product Id Variable product
Line Items → Variation Id Product variation
Line Items → Name Product variation
Line Items → Price Product variation
Line Items → Sku Product variation
Line Items → Tax Class Variable product

Trigger Rules

A Trigger Rule defines an event (or multiple events) that will cause WooCommerce data to be sent to a Zapier Zap.

The following trigger rules are available to trigger your Zaps when product data in your WooCommerce store is added, changed or deleted.

Product created

Triggers when a product is created.

Triggers for every individual product variation in a variable product, and the parent product as well.

Product deleted

Triggers when a product is deleted (trashed).

Due to limitations in how WooCommerce handles deleted events, only the ID of the deleted resource is sent to Zapier when using this trigger rule. No other data fields are available.

Product restored

Triggers when an already trashed product is restored from the trash.

Product stock low

v2.6 Stock Management

Triggers when an existing product or product variation’s stock quantity reaches the low stock threshold.

Tip: Configuring the low stock threshold

The default low stock threshold for your store can be configured in WooCommerceSettingsProductsInventory then entering a value in the Low stock threshold field.

The low stock threshold can also be configured on a per-product basis by editing the product in WooCommerce, and then:

  • For regular products, go to the Product DataInventoryLow stock threshold field and enter a value in the Low stock threshold field and save the product.
  • For individual variations, go to the Product DataVariations tab and for each variation enter a value in the Low stock threshold field and save each variation.

Product stock status changed

v2.6 Stock Management

Product stock statuses in WooCommerce are an important aspect of product management in WooCommerce.

The standard product stock statuses in WooCommerce are:

  • In stock
  • On backorder
  • Out of stock

If your product has stock management enabled, then the stock status of your product will change automatically based on the stock quantity of your product.

Below is a full list of Product stock status changed trigger rules:

  • Product stock status changed (any status)
  • Product stock status changed to in stock
  • Product stock status changed to on backorder
  • Product stock status changed to out of stock

The Product stock status changed (any status) trigger rule will trigger every time an existing product changes status to any status.

If you are interested in specific product stock status change(s) only, you may wish to use a more specific Product stock changed to … trigger rule.

Product updated

Triggers when a product is updated/edited/changed/modified.

Triggers for every individual product variation in a variable product, and the parent product as well.

Actions and Searches

An action is an event a Zap performs after it is triggered. Actions allow you to create new or update existing WooCommerce data from a Zap.

Searches let you find existing WooCommerce data in a Zap, and then use it later in a subsequent step.

The following actions are available for use in your Zaps to create, update or find products.

Line-Item Enabled Data Fields: Downloads, Categories, Images, Attributes, Meta Data

To specify multiple values for these field(s), the values must be sent in a line-item aware format. Please see here for details on how the Line Itemizer can be used to achieve this.

Create Product

Creates a new product or product variation in WooCommerce.

Creating a Variable Product

v2.6

To create a variable product, set Type to variable or variable-subscription3, and specify one or more product Attributes with Variation set to true.

For example, to create a variable product with a custom Size attribute, you would specify something like the following:

  • Type: variable
  • AttributesName: Size
  • AttributesVariation: true
  • AttributesOptions: Small, Medium, Large

If you already have a store-wide global attribute named Size, you can use that instead of creating a new custom attribute:

  • Type: variable
  • AttributesName: pa_size (or whatever the slug of the global attribute is)
  • AttributesVariation: true
  • AttributesOptions: Small, Medium, Large

Once the Create Product action has been run, you can then create product variation(s) using a subsequent Create Product action(s).

Creating a Variation

v2.6

To create a product variation, you must already have its parent Variable Product or Variable Subscription Product3 created.

In the Create Product step, set Type to variation or subscription_variation3, and then in the Parent Id field, enter the ID of the parent variable product that the variation should belong to:

  • Type: variation
  • Parent Id123 (where 123 is the ID of the parent variable product)
  • AttributesName: Size
  • AttributesOption: Small

The above example will create a new variation with a Size of Small.

Create Input Fields

NAME TYPE DESCRIPTION
Name string Product name.
Slug string Product slug.
Date Created date-time The date the product was created, in the site’s timezone.
Type string Product type.
Status string Product status (post status).
Featured boolean Featured product.
Catalog Visibility string Catalog visibility.
Description string Product description.
Short Description string Product short description.
Sku string Stock Keeping Unit.
Global Unique Id string GTIN, UPC, EAN or ISBN.
Regular Price string Product regular price.
Sale Price string Product sale price.
Date on Sale from date-time Start date of sale price, in the site’s timezone.
Date on Sale to date-time End date of sale price, in the site’s timezone.
Virtual boolean If the product is virtual.
Downloadable boolean If the product is downloadable.
Downloads array List of downloadable files.
Only the child fields are visible in the Zapier UI.
Downloads → Id string File ID.
Downloads → Name string File name.
Downloads → File string File URL.
Download Limit integer Number of times downloadable files can be downloaded after purchase.
Download Expiry integer Number of days until access to downloadable files expires.
External Url string Product external URL. Only for external products.
Button Text string Product external button text. Only for external products.
Tax Status string Tax status.
Tax Class4 string Tax class.
Manage Stock boolean Stock management at product level.
Stock Quantity integer Stock quantity.
Stock Status string Controls the stock status of the product.
Backorders string If managing stock, this controls if backorders are allowed.
Low Stock Amount integer Low Stock amount for the product.
Sold Individually boolean Allow one item to be bought in a single order.
Weight string Product weight (kg).
Dimensions object Product dimensions.
Only the child fields are visible in the Zapier UI.
Dimensions → Length string Product length (cm).
Dimensions → Width string Product width (cm).
Dimensions → Height string Product height (cm).
Shipping Class string Shipping class slug.
Reviews Allowed boolean Allow reviews.
Post Password string Post password.
Upsell Ids array List of up-sell products IDs.
Cross Sell Ids array List of cross-sell products IDs.
Parent Id integer Product parent ID.
Purchase Note string Optional note to send the customer after purchase.
Categories array List of categories.
Only the child fields are visible in the Zapier UI.
Categories → Id integer Category ID.
Tags array List of tags.
Only the child fields are visible in the Zapier UI.
Tags → Id integer Tag ID.
Images array List of images.
Only the child fields are visible in the Zapier UI.
Images → Id integer Image ID.
Images → Src string Image URL.
Images → Name string Image name.
Images → Alt string Image alternative text.
Attributes array List of attributes.
Only the child fields are visible in the Zapier UI.
Attributes → Id integer Attribute ID.
Attributes → Name string Attribute name.
Attributes → Position integer Attribute position.
Attributes → Visible boolean Define if the attribute is visible on the “Additional information” tab in the product’s page.
Attributes → Variation boolean Define if the attribute can be used as variation.
Attributes → Options array List of available term names of the attribute.
Default Attributes array Defaults variation attributes.
Only the child fields are visible in the Zapier UI.
Default Attributes → Id integer Attribute ID.
Default Attributes → Name string Attribute name.
Default Attributes → Option string Selected attribute term name.
Menu Order integer Menu order, used to custom sort products.
Meta Data array Meta data.
Only the child fields are visible in the Zapier UI.
Meta Data → Key string Meta key.
Meta Data → Value any Meta value.

Update Product

Updates (modifies) an existing product or production variation in WooCommerce.

This action lets you change almost any aspect of an existing product. See the Update Product Data Fields section for a full list of fields that can be updated.

If you would like to update the product’s pricing or stock quantity, we recommend using the dedicated Update Product Price or Update Product Stock Quantity actions instead. These separate actions also support relative price and stock quantity adjustments.

An update action always requires a valid top-level ID to be specified. This ensures that your Zap knows which record to update. On the other hand, any non-top-level ID is optional. If you leave it empty, WooCommerce will create a new entry, such as a new Meta Data item.

To help identify the correct Resource ID, you can add a Find step before your update step. The result of your Find step will contain the Resource ID, which you can then use in the Update step.

Attributes and Images

When updating, you must specify all or none of the Attributes or Images fields. If any data is present inside Attributes or Images, it will override existing data.

For example, if you want to add an image, you must specify all existing images and the new one. Or if you want to remove an attribute, you must specify all the attributes you want to keep and leave out the ones you want to remove.

Updating a Product Variation

v2.6

To update a product variation, set the ID field to the individual variation’s ID.

Update Input Fields

NAME TYPE DESCRIPTION
Existing ID integer Unique identifier for the resource.
Required
Name string Product name.
Slug string Product slug.
Date Created date-time The date the product was created, in the site’s timezone.
Type string Product type.
Status string Product status (post status).
Featured boolean Featured product.
Catalog Visibility string Catalog visibility.
Description string Product description.
Short Description string Product short description.
Sku string Stock Keeping Unit.
Global Unique Id string GTIN, UPC, EAN or ISBN.
Regular Price string Product regular price.
Sale Price string Product sale price.
Date on Sale from date-time Start date of sale price, in the site’s timezone.
Date on Sale to date-time End date of sale price, in the site’s timezone.
Virtual boolean If the product is virtual.
Downloadable boolean If the product is downloadable.
Downloads array List of downloadable files.
Only the child fields are visible in the Zapier UI.
Downloads → Existing ID string File ID.
Leave empty to create a new downloads record. Otherwise, enter an existing ID.
Downloads → Name string File name.
Downloads → File string File URL.
Download Limit integer Number of times downloadable files can be downloaded after purchase.
Download Expiry integer Number of days until access to downloadable files expires.
External Url string Product external URL. Only for external products.
Button Text string Product external button text. Only for external products.
Tax Status string Tax status.
Tax Class4 string Tax class.
Manage Stock boolean Stock management at product level.
Stock Quantity integer Stock quantity.
Stock Status string Controls the stock status of the product.
Backorders string If managing stock, this controls if backorders are allowed.
Low Stock Amount integer Low Stock amount for the product.
Sold Individually boolean Allow one item to be bought in a single order.
Weight string Product weight (kg).
Dimensions object Product dimensions.
Only the child fields are visible in the Zapier UI.
Dimensions → Length string Product length (cm).
Dimensions → Width string Product width (cm).
Dimensions → Height string Product height (cm).
Shipping Class string Shipping class slug.
Reviews Allowed boolean Allow reviews.
Post Password string Post password.
Upsell Ids array List of up-sell products IDs.
Cross Sell Ids array List of cross-sell products IDs.
Parent Id integer Product parent ID.
Purchase Note string Optional note to send the customer after purchase.
Categories array List of categories.
Only the child fields are visible in the Zapier UI.
Categories → Existing ID integer Category ID.
Leave empty to create a new categories record. Otherwise, enter an existing ID.
Tags array List of tags.
Only the child fields are visible in the Zapier UI.
Tags → Existing ID integer Tag ID.
Leave empty to create a new tags record. Otherwise, enter an existing ID.
Images array List of images.
Only the child fields are visible in the Zapier UI.
Images → Existing ID integer Image ID.
Leave empty to create a new images record. Otherwise, enter an existing ID.
Images → Src string Image URL.
Images → Name string Image name.
Images → Alt string Image alternative text.
Attributes array List of attributes.
Only the child fields are visible in the Zapier UI.
Attributes → Existing ID integer Attribute ID.
Leave empty to create a new attributes record. Otherwise, enter an existing ID.
Attributes → Name string Attribute name.
Attributes → Position integer Attribute position.
Attributes → Visible boolean Define if the attribute is visible on the “Additional information” tab in the product’s page.
Attributes → Variation boolean Define if the attribute can be used as variation.
Attributes → Options array List of available term names of the attribute.
Default Attributes array Defaults variation attributes.
Only the child fields are visible in the Zapier UI.
Default Attributes → Existing ID integer Attribute ID.
Leave empty to create a new default attributes record. Otherwise, enter an existing ID.
Default Attributes → Name string Attribute name.
Default Attributes → Option string Selected attribute term name.
Menu Order integer Menu order, used to custom sort products.
Meta Data array Meta data.
Only the child fields are visible in the Zapier UI.
Meta Data → Existing ID integer Meta ID.
Leave empty to create a new meta data record. Otherwise, enter an existing ID.
Meta Data → Key string Meta key.
Meta Data → Value any Meta value.

Update Product Price

v2.6

Modifies an existing product or product variation’s regular price or sale price in WooCommerce.

This action targets a specific product or product variation by SKU or ID. It also supports the calculation of new (relative) prices by increasing or decreasing the prices by the specified amount or percentage.

It also allows users to set a product’s sale price relative to the product’s regular price.

You can use ID or SKU to identify a which existing product to update in this action.

The following adjustment types are available for use in this action:

  • Set Regular Price To
  • Increase Regular Price By (fixed amount or percentage)
  • Decrease Regular Price By (fixed amount or percentage)
  • Set Sale Price To
  • Increase Sale Price By (fixed amount or percentage)
  • Decrease Sale Price By (fixed amount or percentage)
  • Set Sale Price to Regular Price Decreased By (fixed amount or percentage)

This action returns a subset of the product data fields. See the Update Product Price Data Fields section for more information.

Update Product Price Data Fields

NAME TYPE DESCRIPTION
Product or Variation Identifier string Select how to find the existing product or variation to update
Required
Product Value string Input the SKU or ID of the product or variation to update
Required
Adjustment Type string Choose how and what to modify the product’s price
Required
Price Value string Enter a value to set, increase, or decrease the current price (fixed or %)
Required

NAME TYPE DESCRIPTION
Id integer Unique identifier for the resource
Sku string Unique identifier
Price string Current product price
Regular Price string Product regular price
Sale Price string Product sale price
On Sale boolean Shows if the product is on sale

Update Product Stock Quantity

v2.5 Stock Management

Modifies an existing product or product variation’s stock quantity in WooCommerce.

This action targets a specific product or product variation by SKU or ID. It also supports the calculation of new (relative) stock quantity by increasing or reducing the current stock quantity by the specified amount.

You can use ID or SKU to identify a which existing product to update in this action.

The following adjustment types are available for use in this action:

  • Set Stock Quantity To
  • Increase Stock Quantity By
  • Reduce Stock Quantity By

This action returns a subset of the product data fields. See the Update Product Stock Quantity Data Fields section for more information.

When this action runs, it will automatically set the relevant product’s Stock Status to In Stock or Out of Stock depending on the new stock quantity. If the product has backorders enabled, then the Stock Status will be set to On Backorder when the quantity goes to zero or negative

Update Product Stock Quantity Data Fields

NAME TYPE DESCRIPTION
Product or Variation Identifier string Select how to find the existing product or variation to update
Required
Product Value string Input the SKU or ID of the product or variation to update
Required
Adjustment Type string Choose how to modify the product’s stock quantity
Required
Adjustment Value integer Enter a numeric value to set, increase, or reduce the current stock quantity
Required

NAME TYPE DESCRIPTION
Id integer Unique identifier for the resource
Sku string Unique identifier
Stock Quantity integer Stock quantity
Stock Status string Controls the stock status of the product

Find Product

v2.6

Searches for an existing product or product variation in WooCommerce. Optionally create one if none are found.

All available search fields can be viewed here. We recommend using the following search fields:

  • SKU: Searches for the specified product SKU.
  • Product ID: Searches for the specified (numeric) product or variation ID.
  • Search: Searches the Product Name and Product Description fields for the specified string/term/phrase.

By default, a Find Product step will search across all product types, including product variations. If you only want to find top-level products (i.e. not variations), then you can use the Parent Id search field and set it to 0 (zero).

Please see here for some suggestions on how to find WooCommerce products from WooCommerce Order Line Items.

Searches return the first result found

Each search has a default sort order, so when defining your Search step, you can use the Order and Orderby fields to choose (for example) whether the most recent result or the oldest result is returned from your search.

Search Input Fields

NAME TYPE DESCRIPTION
Product Id string Limit search by ID.
Search string Limit results to those matching a string.
Modified After string Limit response to resources modified after a given ISO8601 compliant date.
Modified Before string Limit response to resources modified before a given ISO8601 compliant date.
Order string Order sort attribute ascending or descending.
Orderby string Sort collection by object attribute.
Parent array Limit result set to those of particular parent IDs.
Slug string Limit result set to products with a specific slug.
Status string Limit result set to products assigned a specific status.
Type string Limit result set to products assigned a specific type.
Sku string Limit result set to products with specific SKU(s). Use commas to separate.
Featured boolean Limit result set to featured products.
Category string Limit result set to products assigned a specific category ID.
Tag string Limit result set to products assigned a specific tag ID.
Shipping Class string Limit result set to products assigned a specific shipping class ID.
Attribute string Limit result set to products with a specific attribute. Use the taxonomy name/attribute slug.
Attribute Term string Limit result set to products with a specific attribute term ID (required an assigned attribute).
Tax Class4 string Limit result set to products with a specific tax class.
On Sale boolean Limit result set to products on sale.
Min Price string Limit result set to products based on a minimum price.
Max Price string Limit result set to products based on a maximum price.
Include Meta array Limit meta_data to specific keys.
Exclude Meta array Ensure meta_data excludes specific keys.
Stock Status string Limit result set to products with specified stock status.
Search Sku string Limit results to those with a SKU that partial matches a string.

Product Data

NAME TYPE DESCRIPTION
Id integer Unique identifier for the resource.
Name string Product name.
Slug string Product slug.
Permalink string Product URL.
Date Created date-time The date the product was created, in the site’s timezone.
Date Modified date-time The date the product was last modified, in the site’s timezone.
Type string Product type.
Status string Product status (post status).
Featured boolean Featured product.
Catalog Visibility string Catalog visibility.
Description string Product description.
Short Description string Product short description.
Sku string Stock Keeping Unit.
Global Unique Id string GTIN, UPC, EAN or ISBN.
Price string Current product price.
Regular Price string Product regular price.
Sale Price string Product sale price.
Date on Sale from date-time Start date of sale price, in the site’s timezone.
Date on Sale to date-time End date of sale price, in the site’s timezone.
Price Html string Price formatted in HTML.
On Sale boolean Shows if the product is on sale.
Purchasable boolean Shows if the product can be bought.
Total Sales integer Amount of sales.
Virtual boolean If the product is virtual.
Downloadable boolean If the product is downloadable.
Downloads array List of downloadable files.
Downloads → Id string File ID.
Downloads → Name string File name.
Downloads → File string File URL.
Download Limit integer Number of times downloadable files can be downloaded after purchase.
Download Expiry integer Number of days until access to downloadable files expires.
External Url string Product external URL. Only for external products.
Button Text string Product external button text. Only for external products.
Tax Status string Tax status.
Tax Class string Tax class.
Manage Stock boolean Stock management at product level.
Stock Quantity integer Stock quantity.
Stock Status string Controls the stock status of the product.
Backorders string If managing stock, this controls if backorders are allowed.
Backorders Allowed boolean Shows if backorders are allowed.
Backordered boolean Shows if the product is on backordered.
Low Stock Amount integer Low Stock amount for the product.
Sold Individually boolean Allow one item to be bought in a single order.
Weight string Product weight (kg).
Dimensions object Product dimensions.
Dimensions → Length string Product length (cm).
Dimensions → Width string Product width (cm).
Dimensions → Height string Product height (cm).
Shipping Required boolean Shows if the product need to be shipped.
Shipping Taxable boolean Shows whether or not the product shipping is taxable.
Shipping Class string Shipping class slug.
Shipping Class Id string Shipping class ID.
Reviews Allowed boolean Allow reviews.
Post Password string Post password.
Average Rating string Reviews average rating.
Rating Count integer Amount of reviews that the product have.
Related Ids array List of related products IDs.
Upsell Ids array List of up-sell products IDs.
Cross Sell Ids array List of cross-sell products IDs.
Parent Id integer Product parent ID.
Purchase Note string Optional note to send the customer after purchase.
Categories array List of categories.
Categories → Id integer Category ID.
Categories → Name string Category name.
Categories → Slug string Category slug.
Tags array List of tags.
Tags → Id integer Tag ID.
Tags → Name string Tag name.
Tags → Slug string Tag slug.
Images array List of images.
Images → Id integer Image ID.
Images → Date Created date-time The date the image was created, in the site’s timezone.
Images → Date Modified date-time The date the image was last modified, in the site’s timezone.
Images → Src string Image URL.
Images → Name string Image name.
Images → Alt string Image alternative text.
Has Options boolean Shows if the product needs to be configured before it can be bought.
Attributes array List of attributes.
Attributes → Id integer Attribute ID.
Attributes → Name string Attribute name.
Attributes → Position integer Attribute position.
Attributes → Visible boolean Define if the attribute is visible on the “Additional information” tab in the product’s page.
Attributes → Variation boolean Define if the attribute can be used as variation.
Attributes → Options array List of available term names of the attribute.
Default Attributes array Defaults variation attributes.
Default Attributes → Id integer Attribute ID.
Default Attributes → Name string Attribute name.
Default Attributes → Option string Selected attribute term name.
Variations array List of variations IDs.
Grouped Products array List of grouped products ID.
Menu Order integer Menu order, used to custom sort products.
Meta Data array Meta data.
Meta Data → Id integer Meta ID.
Meta Data → Key string Meta key.
Meta Data → Value any Meta value.
Data Fields May Differ in Your WooCommerce Store

WooCommerce Zapier utilises WooCommerce’s REST API. Data field names, descriptions, and values can vary from one WooCommerce store to another.

Your store’s data, fields, and trigger rules may differ from this documentation due to any of the following:

  • WordPress versions and the locale/language used.
  • Your WooCommerce versions and the features enabled.
  • Your active WordPress plugins and WooCommerce extensions.
  • Any custom code that overrides or changes how the WooCommerce/WordPress REST API operates.

Note: The field definitions are generated using the following settings:

  • WordPress v6.6 with the en_US locale.
  • WooCommerce v9.2 with tax and coupon functionality enabled.
  • The WooCommerce Bookings, WooCommerce Memberships, and WooCommerce Subscriptions plugins were active.

  1. Not all product data is available in an Order Context as a line item. 

  2. Only available if the WooCommerce Bookings plugin is installed. 

  3. Only available if the WooCommerce Subscriptions plugin is installed. 

  4. All Tax Class fields require using the “slug” version of the WooCommerce tax class. See How Can I Use the Tax Class Field for more details.