Signals Database

Signals Database

The structured catalog of the signals that shape which store, product, or offer an AI shopping agent selects. Every record is evidence-typed (spec-fact, reported, or hypothesis) with a confidence level and, where a platform documents its behavior, honest per-platform status.

The whole database is also published in machine-legible form: /signals.json (structured) and /signals.md (Markdown catalog).

Platform coverage matrix

Signals as rows, shopping surfaces as columns. A cell is filled only where a platform documents its own behavior (69 of 195); everything else readsunknown, which is the honest default and not a gap waiting to be filled in.

The shape of what is filled says more than the count. Google and OpenAI document feed and structured-data requirements in detail, so the signals about being eligible are well covered. Almost nothing is documented about how any engine ranks one eligible product against another. Microsoft documents a feed, Anthropic publishes a reference implementation that contains no ranking logic, and Perplexity documents the product data its Merchant Program expects and little else. The blank half of this table is the subject of this site.

This view is generated from the signal records; fixing a cell means fixing a signal, never this table.