# Check catalogue coverage on every platform that sells

> Tier: recipe. Operating recipe: real tool sequence, core rules, known traps.

Serving coverage per platform for the same catalogue, the retail sibling of the account inventory.

**Intent.** Which products serve where, the cross-platform commerce map.

## When to use

- Retail onboarding.
- Quarterly commerce reviews.

## When not to use

- No specific contraindication beyond the preconditions below.

## Sources

Required: any connected source

## Preconditions

- The account is ticked in the dashboard, confirmed via list_accounts.

## Inputs

- `window`: Analysis window. Default: last 30 days.

## Procedure

1. Read serving status per platform. — tools: `google_ads_get_shopping_products`, `meta_get_catalog_products`, `pinterest_get_catalog_inventory`, `tiktok_get_shop_catalog_diagnostics`
2. Cross by item and report platform gaps.

## Decision rules

- **When** A platform serves a fraction of the shared catalogue → **conclude** The gap is the growth lever: route to shopping-feed-health with the platform named.

## Evidence requirements

- Every figure carries its account, metric and window.
- Anything below a readable sample size is reported as unjudged, not as zero.

## Human approval boundary

- The readout changes nothing. Any change it motivates goes through Safe Writes: preview, human confirmation, then apply.

## Failure modes

- Item IDs drift across platforms: state the join rate before the coverage claim.

## Output

- **Readout**: The figures, with windows and accounts named.
- **Flags**: What deserves a deeper skill or a human decision.

## Related

- Skill: [shopping-feed-health](https://www.getmcpads.com/skills/shopping-feed-health.md)