Where to sell an item on 12 US marketplaces: eligibility, fees, profit, target price, payout timing.
Scored across 5 tools
list_marketplaces is clearly distinct, but advise_marketplaces bundles eligibility, per-marketplace fees/profit, picks, and the profit-goal price — overlapping calculate_fees, compare_marketplaces, and find_target_price. The descriptions do draw lines (single-item fee math vs. cross-marketplace ranking vs. price solving), but an agent could reasonably reach for advise_marketplaces when it wanted one of the narrower tools.
All five names are snake_case verb_noun pairs (advise_, calculate_, compare_, find_, list_) with the marketplace domain object implied consistently. No style or verb-form deviations.
Five tools for a focused fee-calculation domain, each covering a distinct question (what's supported, what are the fees, which marketplace ranks best, what price hits my goal, where should I sell). No filler or redundant tools.
The lifecycle is well covered: discovery, fee itemization, ranking, price target, and full eligibility advice with sources. Gaps are minor — no batch/multi-item evaluation, and shipping cost or tax inputs aren't surfaced as separate operations, but core seller workflows are reachable.
Answer "where should I sell this?" for one item. For each US marketplace: whether it accepts the item under its published policies (prohibited and restricted items, condition rules, approval-only categories), the fees and profit at the expected price, the lowest price that meets an optional profit goal, and when the seller gets paid. Every rule cites the official page. Returns picks (highest profit, best margin, fastest payout), ranked marketplaces, ones needing approval, and excluded ones with reasons. Doesn't model demand or the price buyers will pay.
Inputs: condition (required), item_type (required), goal, detail, +13 more.
Calculate the seller fees, net payout, profit, margin and ROI for selling one item at a given price on one US marketplace, itemized fee by fee from the marketplace's official fee schedule. For Amazon FBA and Walmart WFS, include package dimensions to add fulfillment fees.
Inputs: sale_price (required), marketplace (required), detail, options, +8 more.
Rank every supported US marketplace (or a chosen subset) by the profit the seller keeps when selling one item at the same price. Returns the best marketplace, each marketplace's fees, payout and margin, and any marketplaces skipped or rejected with the reason.
Inputs: sale_price (required), detail, package, item_cost, +7 more.
Find the lowest list price on each US marketplace that reaches a goal: a profit in USD, a profit margin percent, or an ROI percent. Results are sorted from cheapest required price; marketplaces where the goal can't be reached are listed with the reason.
Inputs: target (required), detail, package, item_cost, +7 more.
List the supported US marketplaces with their valid categories, options, whether package dimensions are needed, the official fee pages used as sources and the date each was verified. Call this first to find valid category and option values.
Inputs: no named parameters.
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
Loading tool schema changelog…
Exact US seller fees, payout and profit for eBay, Poshmark, Mercari, Etsy, Amazon and 7 more.
E-commerce margin calculator: GO/RISKY/NO-GO verdict for Amazon, Etsy, eBay, Shopify, TikTok Shop.
eBay, Vinted, Poshmark, Reverb and Shopify prices plus a price compare. Pay per call, x402 USDC.
True net profit and breakeven price for eBay, Etsy, Poshmark, Mercari, Depop, Whatnot, TikTok Shop.
Add one secure layer between your agents and this server.