Uncontested Niche Finder

Uncontested Niche Finder

This skill finds products in deep sub-categories of a chosen Mercado Livre (Brasil) category — sub-categories deeper than the third level — that have no platinum seller at all among their listings. These are genuinely platinum-free niches a seller can enter without fighting a dominant incumbent. Given 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.

A truly uncontested niche is a whole deep sub-category with zero platinum sellers — not merely the non-platinum listings inside a sub-category that still has platinum sellers elsewhere. Dropping individual platinum-held listings is not enough: if any platinum seller is active in the sub-category, that niche is contested, so the skill keeps only the deep sub-categories that have no platinum seller present. If keeping only platinum-free sub-categories would leave too few results, the skill may also show non-platinum listings from sub- categories that still have platinum sellers — but it labels those plainly as non-platinum listings (platinum sellers still present in the category) 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 platinum seller?" for a category the seller names.

Prerequisites

• JoomPulse MCP access is configured for the current agent environment.
• The user provides one category, as a name or a category identifier.
• The available JoomPulse tools can resolve a category, walk its deep

sub-categories, and list the active product listings within them.

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) only. Other marketplaces are out of scope.
• Sales and revenue are JoomPulse estimates derived from historical listing

data — not real transactions. Disclose this in every output. By contrast, price, rating, and review count are real Mercado Livre history — say so, it is a strength of the report.

• 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.

Workflow

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, matching on the category name. If several categories match, briefly list the candidates (name and level) and ask which one is meant.

1. Find every sub-category deeper than the third level that sits under the

chosen category. 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.

1. If the chosen category is itself at or above the third level and has no

descendants below 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 platinum-free deep sub-categories

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

sub-categories. 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.

1. Decide which deep sub-categories are genuinely uncontested. A deep sub-

category is uncontested only when it has no platinum seller at all among its listings. Group the listings by their deep sub-category, check each group for any platinum seller, and keep only the sub-categories with zero platinum sellers. Do not merely drop the platinum-held listings from a sub-category that still has platinum sellers — that sub-category is contested and its other listings are not uncontested.

1. From the platinum-free 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 by default). If nothing has estimated sales, fall back to listing the active listings in the platinum-free sub-categories and say so. These are the uncontested niches.

1. If keeping only platinum-free sub-categories leaves too few results, you

may additionally include the non-platinum listings from sub-categories that still have platinum sellers — but present them in a clearly separate, labelled group, "non-platinum listings (platinum sellers still present in the category)", and do not call them uncontested. Always lead with the genuinely platinum-free niches.

1. If every deep sub-category has at least one platinum seller (none are

platinum-free), report that the deep sub-categories are already contested by platinum sellers, suggest a sibling category, and — if helpful — offer the non-platinum 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.

Niche table — 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

Put the JoomPulse 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. You may translate the column headers into the seller's language.

If you also include the fallback group (non-platinum listings from sub- categories that still have platinum sellers, used only when the platinum-free set is too small), put it in a clearly separate, labelled section titled "non-platinum listings (platinum sellers still present in the category)". Use the same columns, but do not call these rows uncontested — be explicit that platinum sellers are still active in those sub-categories.

Disclaimer (every report):

> ⚠️ 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.

Visualization

When the client can render inline visuals, present metric cards and, when the data supports it, the appropriate chart; otherwise present a short text version of the cards. The product table always renders as markdown — never inside a widget — so the competition signal stays legible. Render a chart only when the data supports it, and skip it otherwise.

Cards — three summary cards:

• Produtos encontrados — the count of uncontested niche rows in the table

(non-platinum, in deep sub-categories).

• 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 weekly revenue, 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.

Otherwise (no inline visuals): render the three cards as a short text block, one line each, and — only when there are four or more products — a tiny text list of the top niches by estimated weekly revenue. Never block on visuals; if inline rendering is unavailable or fails, fall straight through to the markdown output. Round numbers and use pt-BR formatting (for example R$ 1.234, 1.234 vendas).

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 no sub-levels deeper

than the third level, say so and offer to run on a broader category.

• No platinum-free sub-categories: if every deep sub-category has at least

one platinum seller, report that the deep sub-categories are already contested by platinum sellers and suggest a sibling category. You may still offer the non-platinum listings, but only under the labelled "non-platinum listings (platinum sellers still present in the category)" group — never as uncontested.

• Too few platinum-free niches: if the genuinely platinum-free sub-categories

yield too few results, you may add the non-platinum listings from sub- categories that still have platinum sellers, in the separate labelled group above — always lead with the platinum-free niches and never relabel the fallback group as uncontested.

• No funded listings: if no listing has estimated sales, list the active

listings in the platinum-free 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".

• Many deep sub-categories: when the deep category set is large, gather the

listings in batches and merge the results before ranking.

• 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.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: joomcode
• Source: joomcode/joompulse-skills
• License: MIT
• Homepage: https://joompulse.com/mcp-connector

Install and usage instructions live in the source repository linked above.