Signal
Product identity and canonical URL
Whether each product has one stable canonical URL matching the feed link plus real manufacturer identifiers, so an agent can match your item to the same product across competing stores.
Per-platform status
Where a platform documents relevant behavior, its status and source are shown. Undocumented platforms show "unknown" - honest unknowns, never invented.
| Platform | Status | Notes | Source |
|---|---|---|---|
| ChatGPT | Unknown | Not documented by this platform. | - |
| Gemini / Google AI Mode | Unknown | Not documented by this platform. | - |
| Perplexity | Unknown | Not documented by this platform. | - |
| Copilot | Unknown | Not documented by this platform. | - |
| Claude | Unknown | Not documented by this platform. | - |
Evidence and sources
This signal is typed spec-fact (Very high confidence).
- Merchant listing structured data (opens in new tab) · 2026-07-08
- Product data specification (opens in new tab) · 2026-07-08
How to act on this
Give each product one canonical URL that resolves to the purchasable page and matches the feed link, and populate gtin/brand/mpn wherever a real identifier exists (never invent one).
Related checklist items
Handbook chapters