AgentReady

The state of product identifiers (GTIN, MPN and SKU)

7 of 75 audited stores publish no GTIN, MPN or SKU on any product we sampled.

Identifiers are how an agent knows that your listing and someone else's are the same item: they merge reviews, compare prices and match a shopper's exact request. Without one, a product is a description an agent has to take on trust.

113 stores audited, last refreshed October 2026.

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What we found

  • 7 of 75 audited stores publish no GTIN, MPN or SKU on any product we sampled.

  • 6 more publish identifiers on some sampled products only.

  • Indian food and beverage stores fail this most often: 3 of 17, or 18%.

  • Indian fashion stores are the exception: none of the 12 we audited fail it.

  • 29% of Custom or headless stores fail this against 8% of Shopify stores.

  • Stores that fail this check average 77 out of 100 overall, against 90 for the stores that pass it.

  • 38 more stores could not be checked at all, usually because the site refused our visit.

By platform

Stores grouped by the platform we detected.

GroupAuditedFailPartlyFail rate
Shopify66568%
Custom or headless72029%
Adobe Commerce (Magento)2000%

By benchmark

Each list links to its full ranking.

GroupAuditedFailPartlyFail rate
Indian beauty and personal care23134%
Indian food and beverage173218%
Indian electronics and gadgets132115%
Indian fashion12000%
Indian home and kitchen101010%

Worst on this check: Indian food and beverage (3 of 17). Best: Indian fashion (0 of 12).

Which stores fail it

All 7 are on a published benchmark list. Each links to its full report and the exact fix.

Why it matters, and how to fix it

Why AI agents care

Identifiers let agents match your product to the same item elsewhere, merge reviews, and compare prices with confidence.

The fix

  • Any platform: Add the barcode (GTIN/UPC/EAN) or manufacturer part number to each product and variant.
  • Shopify: Products > each variant > Barcode (ISBN, UPC, GTIN, etc.).

Questions

How many online stores publish GTIN, MPN or SKU product identifiers?
7 of 75 audited stores publish no GTIN, MPN or SKU on any product we sampled. A further 6 publish identifiers on some sampled products only.
Why does this matter for AI shopping agents?
Identifiers let agents match your product to the same item elsewhere, merge reviews, and compare prices with confidence.
How do I fix product identifiers on my store?
Add the barcode (GTIN/UPC/EAN) or manufacturer part number to each product and variant.
How do I fix it on Shopify?
Products > each variant > Barcode (ISBN, UPC, GTIN, etc.).
How was this measured?
113 well-known stores were audited from our servers with the same check every AgentReady audit runs, most recently on October 11, 2026. 75 of them returned a result for this check.

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How we measured

  • Every store on our public benchmark lists got the same audit as AgentReady's free check. This page counts one of its 16 checks across all of them.
  • 75 of 113 stores returned a result for this check; 38 could not be checked and are left out of every number above.
  • Audits ran from our servers in Singapore. Real AI agents visit from their companies' own networks, so firewall results are a strong signal, not proof.
  • Lists are chosen by hand and refreshed monthly. Last run October 11, 2026.
  • Run one of these stores and want it removed or re-checked? Email dev.prathapk@gmail.com.

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