At a glance
Listings Failing Feedonomics Validation is the share of listings that fail Feedonomics feed validation before they ever reach Mercari. It is a cross-platform card comparing your Feedonomics feed against your intended Mercari catalogue, so the gap lives in the feed tool, not on Mercari. A failed listing simply never publishes.
Calculation
Vortex IQ compares the listings rejected by Feedonomics validation against the total listings submitted to the feed over the window, then expresses the rejections as a percentage. Failures come from feed-side rules such as missing required attributes, malformed values, or category-mapping problems, all caught before a listing is sent on to Mercari. Because this measures the feed tool rather than Mercari itself, a high rate here can sit alongside a healthy-looking live catalogue, since the failed items simply never appeared.Worked example
A representative reading of Listings Failing Feedonomics Validation for a typical Mercari reseller. On 24 Mar 26 the card reads 8.2%, above the 5% line. Of roughly 600 listings pushed through the feed that week, around 49 were rejected. Drilling in, most failures cluster on a missing brand attribute and a handful on an invalid condition value that does not map to Mercari’s grading. The reading tells you those 49 items never published and are silently absent from Mercari, costing you sales you never saw fail. The action is to fix the feed rules: backfill the brand attribute and correct the condition mapping so ‘Good’ and ‘Like New’ translate cleanly. Cross-referencemer_xc_catalogue_drift_vs_bc to see whether the same data quality gaps are also causing drift on items that did publish, and mer_listings_active to confirm the live count is lower than your catalogue intent. Vortex Mind traces upstream causes such as a feed-template change that dropped a required field, and Ask Viq answers plain-English questions like “what was the top validation failure reason this week”.
Sibling cards merchants should reference together
Reconciling against Mercari
Where to look in Mercari’s own dashboard: Mercari only knows about listings that successfully reached it, so a failed feed item leaves no trace in the Mercari dashboard. The validation failures live in your Feedonomics feed logs, where each rejected row carries the rule it broke. The comparison here is your Feedonomics feed versus your intended Mercari catalogue, which means the Mercari dashboard alone will not show the gap because the missing items never arrived. Why the Vortex IQ value may legitimately differ:
Cross-connector reconciliation: Because this compares Feedonomics against your Mercari intent, fixes belong in the feed configuration, not in Mercari. For divergence investigations, use Vortex Mind.