The Scenario
You are the merchandising manager at a fashion retailer. Your 500 color-size variants for 80 parent products need to be in Klaviyo so the abandoned-cart flow can recommend the specific variant a customer left behind — not just the parent product. The variants are in an Excel workbook: parent item ID, variant title, SKU, price, and inventory quantity across five columns. The parent products were created in Klaviyo last week, but the variant creation job is still sitting on the backlog.
The bad version:
- Look up Klaviyo's catalog variant API and discover it requires the Klaviyo catalog item ID of the parent product in each request body — those IDs are not in the variant workbook.
- Open the parent products worksheet, use VLOOKUP to cross-reference item IDs into the variants worksheet, and find that three parent product names have trailing spaces causing lookup failures.
- Fix the lookups, format the 500 rows into the API's expected JSON structure, batch them into groups of 100, and submit — then find that three parent IDs were wrong and 60 variants failed without any visible error in the workbook.
The abandoned-cart flow is sitting idle while a data join problem holds up the catalog.
The Easy Way: One Prompt in SheetXAI
SheetXAI is an AI agent that lives inside your Excel workbook. It reads both worksheets, resolves the relationships, and calls Klaviyo's bulk variant creation endpoint — handling batching automatically.
Create a Klaviyo catalog variant for each row in this workbook — parent item ID in column A, variant title in column B, SKU in column C, price in column D, and inventory quantity in column E
What You Get
- Variants are submitted in batches of up to 100.
- Each returned variant ID is written back into column F on the corresponding row.
- Rows that fail surface with the row number and the Klaviyo error response.
What If the Data Is Not Quite Ready
Parent item IDs need to be joined from a separate worksheet
The "Variants" worksheet has product names in column A and variant details in columns B through E. The "Parent Products" worksheet has product names in column A and Klaviyo item IDs in column B. Join them on product name, then create a Klaviyo catalog variant for each row using the matched item ID, writing the new variant ID into column F
Inventory quantities are missing for 40 rows
Create Klaviyo catalog variants for all rows in this workbook; for rows where column E (inventory quantity) is blank, set inventory_quantity to 0 before submitting; write the returned variant ID into column F
The workbook needs to be processed by category
Create Klaviyo catalog variants for all rows grouped by the category value in column F — submit each category's variants as a separate batch job and write the returned variant IDs back into column G
Full creation with parent ID lookup and error log
Join the "Variants" worksheet with the "Parent Products" worksheet on product name, create Klaviyo catalog variants for all 500 rows using the matched parent item ID, write the returned variant ID into column F, write the error reason into column G for any failed rows, and output a summary showing variants created per parent product
The abandoned-cart flow gets the variant catalog it needs.
Try It
Get the 7-day free trial of SheetXAI and open the variant workbook your merchandising team maintains, then ask it to push all 500 variants into Klaviyo. Also check out how to create a product catalog from an Excel workbook if you still need to seed the parent products first.