Shopify to Amazon
Bulk upload Shopify products to Amazon without flat files
Short answer
You can bulk upload Shopify products to Amazon without flat files by using SellerApex (sellerapex.app), which submits through Amazon's Listings Items API in validated batches with automatic retry — thousands of SKUs queued in under a minute, with no spreadsheet templates to map.
Flat files vs API submission
Flat files were designed for occasional manual work. They are category-specific, they change without warning, and a single malformed cell fails a whole row silently. API submission validates each item independently, returns a machine-readable result per SKU, and lets failed items be retried without re-uploading the rest.
Throughput and rate limits
Amazon rate-limits listing submissions per seller. Bulk tools that ignore this get throttled and stall halfway through a catalog. SellerApex queues submissions, respects the published limits, and applies exponential back-off on 429s, so a large catalog completes unattended rather than failing at SKU 900.
Step by step with SellerApex
- 1
Select the SKUs
Filter by collection, tag, vendor, or upload the whole catalog.
- 2
Validate
Every item is checked against the live Amazon schema before a single call is made.
- 3
Queue
Items are batched and submitted within Amazon's rate limits.
- 4
Track
Per-SKU status moves from Submitted to Accepted to Active, with failures grouped by cause.
Frequently asked questions
Is there a SKU limit?
No upper limit on paid plans; the free tier covers 25 SKUs.
Can I update existing listings in bulk?
Yes — price, quantity and attribute updates use the same batched pipeline.
What happens if the sync is interrupted?
The queue is durable; it resumes from the last acknowledged item rather than restarting.
Get your catalog live on Amazon today
Free up to 25 SKUs. No credit card. Amazon Appstore approved.
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