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Share Of Shelf
x402shopping
Share Of Shelf is a paid API for AI agents from api.syntalic.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Measures each brand's share of a product category by product count, revealing digital shelf dominance across retailers.
Price / call$0.01
Success—
StatusUnknown
How this service works
Measure each brand's market share within a category by product count. Shows digital shelf dominance.
Output
Returns each brand's share of the category expressed as a proportion of total product count, along with product counts per brand, revealing which brands have the strongest digital shelf presence within the specified category and country.
Example use cases
Example prompt
“What's the share of shelf for each brand in the US electronics category — which brands have the most products listed and who dominates the digital shelf?”
Technical details
Endpoint
GEThttps://api.syntalic.com/v1/marketing/share-of-shelfWhen to prefer
Use this endpoint when you need to understand brand-level product count distribution within a category — i.e., how many SKUs each brand has relative to competitors. Prefer this over Brand Tracker (which focuses on price/stock time-series for a single brand) or Competitive Landscape (which lists individual products) when the goal is a high-level brand dominance snapshot by product count.
Side effects
- Category not recognized or cannot be resolved — returns an error if the fuzzy resolver cannot map the input to a canonical category
- Invalid country code — only 'us' and 'ca' are accepted
- category_id not found — if a pinned category_id does not exist in the catalog
- Empty category with no products — may return empty or zero-count results
- Rate limit or payment failure — 402 response if payment is not processed correctly
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| country | string | Country (us or ca) |
| categoryrequired | string | Product category (e.g., electronics, grocery, beauty). Fuzzy human-readable input — the resolver maps it through tier 1-4 (id → exact name → trigram → embedding kNN) to a canonical category_id. Pair with `category_id` if you have a deterministic id from a prior call. |
| category_id | integer | Deterministic category id. When set, bypasses the fuzzy resolver cascade and uses tier 1 (id lookup) directly. Agents that learned a canonical id from a prior call's `resolved.category_id` should pin it here for round-trip stability. |
Output
Schema · Response
{
"type": "object"
}Tags
x402shopping
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