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Friday Seller Tools – GTIN Batch Validate
x402
Friday Seller Tools – GTIN Batch Validate is a paid API for AI agents from friday-seller-tools-production.up.railway.app, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-15).
Validates a batch of GTINs (Global Trade Item Numbers) for correctness and marketplace eligibility across Amazon, Walmart, Shopify, and eBay.
Price / call$0.25
Success—
StatusUnknown
How this service works
Instant, low-cost Amazon, Walmart, Shopify, and eBay listing, upload-preparation, advertising, and image-brief deliverables.
Output
Returns a job_id and a 'queued' status immediately, indicating the batch GTIN validation job has been accepted for asynchronous processing. The agent can use the job_id to poll for results containing per-GTIN validity outcomes.
Example use cases
Pre-upload Amazon catalog GTIN check
“I'm about to bulk upload 200 products to Amazon and I need to validate all their GTINs first — can you run them through a batch GTIN check so I can catch any bad barcodes before the listing gets rejected?”
Walmart listing barcode verification
“Before I submit my new product listings to Walmart Marketplace, can you validate this list of UPC codes to make sure they're all correctly formatted and will pass Walmart's GTIN requirements?”
eBay catalog compliance check
“I inherited a messy product spreadsheet with a mix of UPCs and EANs and I'm not sure which ones are valid — can you batch validate all the GTINs so I know which products are safe to list on eBay?”
Technical details
Endpoint
POSThttps://friday-seller-tools-production.up.railway.app/v1/identifiers/gtin-batch-validateWhen to prefer
Choose this endpoint when you need to validate multiple GTINs/UPCs/EANs in a single call before bulk-uploading product listings to Amazon, Walmart, Shopify, or eBay. Prefer this over single-item validation when working with product catalogs of any meaningful size, and when you need asynchronous batch processing with a job_id for later result retrieval.
Side effects
- Invalid or malformed GTIN format in the batch payload — returns validation error
- Empty batch payload — returns 400 bad request
- Batch size exceeds allowed limit — returns error with size constraint details
- Network timeout on Railway-hosted service — returns 5xx error
- Payment not processed (x402 protocol failure) — returns 402 payment required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| codes | array |
Output
Schema · Response
{
"type": "json",
"example": {
"job_id": "example",
"status": "queued"
}
}Tags
x402
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