ai.wem3/wem-price-compare

Description and use

Price comparison across partner retailers. Read-only, 90-day history, disclosed affiliate.

Compatible agents

• Claude Desktop
• Claude Code
• Hermes
• Codex CLI

Capabilities

WEM price comparison: Cross-retailer offers for one product, cheapest first, with the 90-day price low and WEM's tracked outbound links.

compare_offers: Exact multi-retailer offers for one product from WEM's own catalogue, cheapest first, with a 90-day price-history low. Identity is resolved by barcode or catalogue slug — no text matching — so every offer IS the product, and the lookup spends no retailer API quota. Use this FIRST when you have a barcode (EAN/UPC/GTIN) or a wem3.ai/pl/{slug} URL; fall back to search_products when the product is not in the catalogue yet.

compare_products: Compare 2-5 products side by side. Returns a structured comparison of price, rating, shipping, and key features. Use when the user is deciding between options.

find_lowest_price: Find the single lowest-priced product matching the stated constraints. Ranks on price, adjusted for the priorities the caller states (rating, shipping) — never on WEM commission. Use when the user wants a recommendation rather than a list. Candidates are filtered to plausible matches for the query first, so a cheap accessory cannot be returned as the cheapest way to buy the product itself; recommendation may be null with a reason when nothing matched confidently, and that must be reported as "no confident match" rather than softened into a suggestion. recommendation.verified marks an offer whose identity WEM has resolved rather than inferred.

get_categories: Get available product categories and the approximate price range for each. Use to guide the user when their request is vague.

get_product: Get full details for a specific product by its provider and ID. Use after search results to get more info before recommending.

search_products: Search for products across all connected marketplaces (eBay, Amazon, Awin merchants, etc.) using keywords. Returns a list of matching products with prices, images, and affiliate links. Suited to specific keyword searches like "airpods pro" or "nike running shoes". When the query names a product in WEM's own catalogue, a catalogMatch block is also returned: its offers are identity-resolved rather than title-matched, so prefer them and cite its prices over anything in products. Weak matches are withheld and tallied by reason in filtered — report that count rather than implying the search was exhaustive.

semantic_search: Search for products using natural language descriptions. Uses AI embeddings for semantic understanding — handles vague requests like "comfortable shoes for standing all day" or "gift for a 10 year old who likes science". Falls back to keyword search when vector data is unavailable.

verify_offer: Check a price claim before repeating it. Given a product and a price someone has asserted at a named retailer, returns whether that price is live in WEM's verified catalogue and whether anything cheaper exists. Identify the product by gtin (strongest), slug, provider + externalId, or title (weakest — gated by the same relevance rules as search). Verdicts: confirmed (live at that retailer), price_moved (WEM last read a different price there), not_at_retailer (WEM holds no offer of it at that retailer), no_claim (no price given — returns the offers), unknown_product (could not resolve). unknown_product means the claim could NOT be checked; it never means the claim is false, and must not be reported as one. Every result carries lastConfirmedAt so the answer's freshness is visible. Use this before quoting any price you did not get from WEM.

streamable-http: Transport declared by the upstream MCP registry.

Limitations and review notes

Discovered metadata only; install commands are stored for review but never executed by AtlasRepo.