Uncontested Niche Finder

This skill finds products in deep sub-categories of a chosen category — on Mercado Livre (Brasil) or Shopee Brasil — where the whole deep sub-category has no dominant incumbent among its listings. On Mercado Livre the incumbent test is no platinum seller at all; on Shopee, which has no seller medals, it is no Official store (Shopee Mall) seller at all. Given a marketplace and a category by name or identifier, it surfaces the active listings in those deep niches, and ranks them by estimated traction so the strongest uncontested opportunities surface first. On Mercado Livre each row links to its JoomPulse page; on Shopee each row links to the item on Shopee.

A truly uncontested niche is a whole deep sub-category with zero incumbents of that kind — not merely the listings without one inside a sub-category that still has them elsewhere. Dropping individual incumbent-held listings is not enough: if any platinum seller (Mercado Livre) or any Official store (Shopee) is active in the sub-category, that niche is contested, so the skill keeps only the deep sub-categories with none present. If keeping only those would leave too few results, the skill may also show the non-incumbent listings from sub-categories that still have one — but it labels those plainly as non-platinum listings (platinum sellers still present in the category) on Mercado Livre, or listings outside an Official store (Official stores still present in the category) on Shopee, and does not call them uncontested.

This is different from broad assortment work. To size up one product and the products that compete with it, use the ml-product-analysis skill. To find the fast-growing deep categories under a category (rather than the products inside them), use the growing-leaf-category-tracker skill. This skill answers "where can I enter without facing a dominant incumbent?" for a category the seller names, on the marketplace they choose.

Prerequisites

• JoomPulse MCP access is configured for the current agent environment.
• The user provides a marketplace — Mercado Livre (Brasil) or Shopee Brasil — and one category, as a name or a category identifier.
• The available JoomPulse tools can resolve a category on either marketplace, reach the levels below it, and list the active product listings within them, with the standing of the seller behind each listing — the seller medal on Mercado Livre, the shop tier on Shopee.
• On Shopee, category analytics stop at three levels, so the deep set is built from the deeper category path the items themselves carry; the competition signal for a deep niche comes from the view of the sellers in a category, pinned to one category at a time.

If JoomPulse MCP access is unavailable, stop and explain that the skill requires JoomPulse MCP setup before it can find uncontested niches.

Scope

• Mercado Livre (Brasil) and Shopee Brasil, one at a time. Other marketplaces are out of scope.
• Sales and revenue are JoomPulse estimates — not real transactions. Disclose this in every output. By contrast, price, rating, and review count are real history from the marketplace — say so, it is a strength of the report. The estimates are built differently on each marketplace: on Mercado Livre from historical listing data, on Shopee from the marketplace's own rounded sold counters refined with review movement. Use the matching disclaimer.
• Read-only. The skill does not sign in as the seller or modify any listing.
• Language: detect the seller's language and respond in it. Default to pt-BR.
• Keep the workflow invisible. The seller wants the niches, not a play-by- play. If one approach does not return data, switch to another quietly; only if every approach fails do you say one short, friendly sentence. Never fill gaps from general knowledge.

Shopee data — what differs from Mercado Livre

• Estimates come from Shopee's own rounded sold counters, refined with review movement. Treat small gaps between items as noise and never rank on a difference of a few units. Price, rating and review count are real.
• Coverage is not a census: only items with at least one lifetime sale are tracked, so any count is a lower bound and an absent item is not evidence it does not sell.
• History starts May 2026 — there is no long-run trend and no seasonal read.
• Category analytics stop at three levels; the item view reaches deeper. Say which you used.
• No seller medals — Shopee has three mutually exclusive shop tiers: Official store, Preferred (Indicado) and Common. There is no ladder; inventing Shopee medals is fabrication.
• No catalogue and no buy-box, and an item belongs to one shop.
• No fulfilment programme, no free-shipping flag and no listing tier — show — rather than guessing.
• Concentration is measured differently and thresholds do not transfer between marketplaces.
• Item titles mix Portuguese, English and Chinese — search both languages.

Workflow

Step 0 — Decide the marketplace

JoomPulse covers two separate marketplaces: Mercado Livre (Brasil) and Shopee Brasil. They are independent datasets with different coverage, history and mechanics. Decide which one the request belongs to before reading any data:

• The seller said so. "Shopee" means Shopee; "Mercado Livre", "MeLi" or "ML" means Mercado Livre.
• An identifier gives it away. An identifier beginning MLB is Mercado Livre; a bare 10–11 digit number is a Shopee item or shop. A mercadolivre.com.br link is Mercado Livre, a shopee.com.br link is Shopee. If an identifier is not found on the marketplace you assumed, check the other one before telling the seller it does not exist.
• The request only makes sense on one of them — buy-box, catalogue position, seller medals, a fulfilment programme or search keywords are Mercado Livre only.
• Otherwise ask — one short question, mentioning that both are available. Never guess and never default.

Never mix data from the two marketplaces in one query, one table or one total. They are separate pipelines with different grains and estimate methods; a combined figure is simply wrong. If the seller wants both, run the analysis twice and report the two side by side, comparing direction and orders of magnitude — never exact numbers.

Step 1 — Resolve the category and find its deep sub-levels

1. Ask the user for a category (a name or a category identifier). If given a name, use JoomPulse to resolve it to a category on the chosen marketplace, matching on the category name. If several categories match, briefly list the candidates (name and level) and ask which one is meant.
2. Build the set of levels deeper than the third under the chosen category.
   • Mercado Livre: use JoomPulse to walk down the category tree from the chosen branch and collect the descendant categories below the third level. Keep that set of deep category identifiers for the next step.
   • Shopee: deep niches do exist, but only through the item view — Shopee's category analytics stop at three levels, while the items themselves carry a category path several levels deeper, and populated fourth-level leaves are real. So build the deep set from the items' own deeper category path rather than the category tree, and always say which level you worked at.
3. If the chosen category is itself at or above the third level and has nothing deeper beneath it, tell the user there are no deep sub-levels for it and offer to run on a broader category.

Step 2 — Keep only the uncontested deep sub-categories

1. Use JoomPulse to list the active product listings in those deep sub-categories.

   • Mercado Livre: for each listing collect name, category, seller, listing type, seller medal, logistics (frete grátis), price, estimated weekly sales and revenue, rating, review count, time on air, and — where available — how many sellers compete on the listing.
   • Shopee: collect name, the deeper category path the item itself carries, shop, shop tier (Official store / Preferred (Indicado) / Common), price, estimated sales and revenue over the last 30 days, rating, review count, the date the item was created — this is what time on air is computed from — and the date it was last seen. There is no listing-status filter on Shopee, so how recently an item was last seen is what tells you whether it is still live; check it and never present a stale row as a live opportunity. Free shipping and listing tier have no Shopee equivalent. The competition signal — how many sellers are in the niche — comes from the view of the sellers in a category, pinned to one deep category at a time.

2. Decide which deep sub-categories are genuinely uncontested. Group the listings by their deep sub-category and check each group for the incumbent that matters on that marketplace:

   • Mercado Livre: a deep sub-category is uncontested only when it has no platinum seller at all among its listings. Keep only the sub-categories with zero platinum sellers.
   • Shopee: there are no medals and no ladder, so the platinum wording does not carry across. A deep niche is uncontested only when it has no Official store (Shopee Mall) seller at all — the three shop tiers are mutually exclusive (Official store / Preferred (Indicado) / Common). Keep only the niches with zero Official stores.

   Do not merely drop the incumbent-held listings from a sub-category that still has one — that sub-category is contested and its other listings are not uncontested.

3. From the uncontested sub-categories, keep the listings that are real, funded niches — those with estimated sales above zero — and rank them so the strongest uncontested opportunities lead: by estimated weekly revenue on Mercado Livre, by estimated 30-day revenue on Shopee. If nothing has estimated sales, fall back to listing the active listings in those sub-categories and say so. These are the uncontested niches.

4. If keeping only the uncontested sub-categories leaves too few results, you may additionally include the non-incumbent listings from sub-categories that still have one — but present them in a clearly separate, labelled group, "non-platinum listings (platinum sellers still present in the category)" on Mercado Livre or "listings outside an Official store (Official stores still present in the category)" on Shopee, and do not call them uncontested. Always lead with the genuinely uncontested niches.

5. If every deep sub-category has at least one incumbent, report that the deep sub-categories are already contested — by platinum sellers on Mercado Livre, by Official stores on Shopee — suggest a sibling category, and — if helpful — offer the non-incumbent listings under the labelled non-uncontested group described above.

Output

Respond in the seller's language. Present the result with no commentary about how it was produced. The product table always renders as markdown so it reads cleanly in any client.

Lead with a short intro line naming the marketplace and the category — and on Shopee, the category level you actually worked at.

Niche table (Mercado Livre) — one row per uncontested niche product (from the platinum-free deep sub-categories), with these columns:

• Product / listing identifier (rendered as a JoomPulse link for the product)
• Name
• Category
• Seller
• Price
• Estimated sales (weekly)
• Estimated revenue (weekly)
• Number of sellers — the competition signal, so "uncontested" is legible (show — when it is not available)
• Rating
• Reviews
• Time on air
• Free shipping (frete grátis)
• Listing type
• Seller medal — gold, silver, or no medal (never platinum; uncontested rows come only from platinum-free sub-categories per Step 2)
• A JoomPulse link for the product

Niche table (Shopee) — the same shape, with the marketplace's own columns:

• Item identifier, linked to the item on Shopee — there is no JoomPulse dashboard link for Shopee rows, so never invent one
• Name
• Category — the deeper path the item itself carries; say which level it is
• Shop
• Price
• Estimated sales (30 days)
• Estimated revenue (30 days)
• Number of sellers in the niche — the competition signal (show — when it is not available)
• Rating
• Reviews
• Time on air (days) — computed from the date the item was created
• Shop tier — Official store / Preferred (Indicado) / Common; uncontested rows carry only Preferred (Indicado) or Common, never Official store
• Free shipping and listing type have no Shopee equivalent: either drop these columns or show — in them. Never map a shop tier onto a seller medal.

The sales columns are not the same window on the two marketplaces: Mercado Livre reports weekly figures, Shopee reports 30-day figures only — label the Shopee columns as 30 days and never present a 30-day figure under a weekly heading.

Put the marketplace link on the product identifier in each row. When a cell is empty, show — rather than guessing. Below the table, briefly state what "uncontested niche" means here: sub-categories deeper than the third level that have no platinum seller at all among their listings on Mercado Livre, or no Official store (Shopee Mall) seller at all on Shopee. You may translate the column headers into the seller's language.

On Shopee, state this next to the verdict itself, not only in the guardrails: only items with at least one lifetime sale are tracked, so an Official store whose items have never sold is invisible in the data — an "uncontested" verdict can therefore be false. Present it as the best available read, not as proof that no Official store is in the niche.

If you also include the fallback group (listings without the incumbent, taken from sub-categories that still have one, used only when the uncontested set is too small), put it in a clearly separate, labelled section — titled "non-platinum listings (platinum sellers still present in the category)" on Mercado Livre, or "listings outside an Official store (Official stores still present in the category)" on Shopee. Use the same columns, but do not call these rows uncontested — be explicit that the incumbent is still active in those sub-categories.

Disclaimer (every report) — use the variant for the marketplace you queried.

Mercado Livre:

⚠️ Sales and revenue are JoomPulse estimates based on historical listing data — they are not actual transactions. Price, rating, and reviews are real Mercado Livre history. / Vendas e receita são estimativas do JoomPulse com base no histórico de anúncios — não são transações reais. Preço, classificação e avaliações são histórico real do Mercado Livre.

Shopee:

⚠️ Sales and revenue are JoomPulse estimates built from Shopee's own rounded sold counters — they are not actual transactions, and small gaps between items are noise. Only items with at least one lifetime sale are tracked, so this list is a lower bound. Price, rating, and reviews are real Shopee history. / Vendas e receita são estimativas do JoomPulse a partir dos contadores arredondados da própria Shopee — não são transações reais, e diferenças pequenas entre itens são ruído. Só itens com pelo menos uma venda no histórico são rastreados, então esta lista é um piso. Preço, classificação e avaliações são histórico real da Shopee.

Visualization

Render the visuals every time the data supports them. As soon as the analysis is done, present the cards and charts described below as a self-contained visual panel — an artifact where the client renders artifacts, an inline widget where it renders widgets. Do not ask permission first, do not describe the panel instead of drawing it, and do not offer it as an optional extra: the cards and charts are part of the answer, not a follow-up.

• Order: the cards first, then the charts, then the written read.
• The data table always stays markdown in the response text, never inside the panel — the panel carries cards and charts only.
• The estimate disclaimer always stays in the response text as well.
• Skip an individual chart when its own data threshold is not met (each threshold is stated below): a chart nobody can read is worse than no chart. Skipping one chart never means skipping the panel.
• Only the cards and charts specified below. Do not invent extra ones, and do not promote a categorical value to a bar — a chip or plain text is the honest rendering for it.
• If no visual surface is available at all, fall back to the markdown table plus the same figures written as text cards. Never block on visuals, and never leave the answer without its numbers.

The panel contains:

Cards — three summary cards:

• Produtos encontrados — the count of uncontested niche rows in the table (from the deep sub-categories with no incumbent).
• Subnichos cobertos — the count of distinct deep sub-categories actually represented in the results.
• Ticket médio — the average price across the listed rows, in pt-BR currency formatting (for example R$ 1.234).

Chart — a horizontal bar of the top niche products by estimated revenue — weekly on Mercado Livre, 30-day on Shopee, and label the axis with the window you used — strongest uncontested niches first, each bar labelled with a short product name. Skip the bar entirely when there are fewer than four products — show only the cards and the table.

Round numbers and use pt-BR formatting (for example R$ 1.234, 1.234 vendas). If you show Mercado Livre seller medals as coloured chips, keep the standard palette; on Shopee there are no medals, so write the shop tier as plain text and never colour it as a rung on a ladder.

Notes & Guardrails

The seller should never see a system or stack error — only a friendly next step.

• No deep sub-categories: if the chosen category has nothing deeper than the third level, say so and offer to run on a broader category. On Shopee, reach the deeper levels through the item view before concluding there are none.
• No uncontested sub-categories: if every deep sub-category has at least one platinum seller (Mercado Livre) or one Official store (Shopee), report that the deep sub-categories are already contested and suggest a sibling category. You may still offer the non-incumbent listings, but only under the labelled fallback group — never as uncontested.
• Shopee coverage limits the verdict: only items with at least one lifetime sale are tracked, so an Official store whose items have not sold does not appear at all and an "uncontested" verdict can be false. Say this in the output itself, every time. Likewise, there is no listing-status filter — judge whether an item is still live by how recently it was last seen.
• Too few uncontested niches: if the genuinely uncontested sub-categories yield too few results, you may add the non-incumbent listings from sub- categories that still have one, in the separate labelled group above — always lead with the uncontested niches and never relabel the fallback group as uncontested.
• No funded listings: if no listing has estimated sales, list the active listings in the uncontested sub-categories instead and say the niche has little measured traction.
• Unknown flags: when a logistics flag such as frete grátis is unknown, show it as unknown — do not assume "no". On Shopee, free shipping and the listing tier are always —: an absent attribute, not a missing value, and never a "Não".
• Many deep sub-categories: when the deep category set is large, gather the listings in batches and merge the results before ranking. On Shopee the competition signal is pinned to one category at a time, so collect it per niche and merge.
• Market data temporarily unavailable: retry once quietly; if it is still down, say market data is temporarily unavailable. Never paste internal error text, HTTP codes, or field names to the seller.
• Never silently limit coverage — if you cover only some of the deep sub-categories, say so, and on Shopee say which category level you used.