{"name":"ai.wem3/wem-price-compare","slug":"wem3-wem-price-compare","title":"WEM Price Compare","description":"Price comparison across partner retailers. Read-only, 90-day history, disclosed affiliate.","url":"https://mcp.market/server/wem3-wem-price-compare","rating":null,"grade":"C","score":69,"certified":false,"status":"active","category":"other","tags":[],"presence":{"score":8,"stars":null,"forks":null,"downloads_week":null,"last_push_at":null,"license":null},"uptime":{"percent":100,"checks":6,"ok":6,"last_checked_at":"2026-09-20T19:40:42.767Z","last_ok_at":"2026-09-20T19:40:42.767Z","latency_ms":228},"claimed":false,"transport":"remote","callable_via_gateway":true,"default_price_micros":0,"repository":null,"website":"https://wem3.ai/extension/ai","version":"1.0.3","remotes":[{"type":"streamable-http","url":"https://wem3.ai/api/mcp"}],"packages":[],"tools":[{"name":"compare_offers","description":"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, catalogue slug, WEM ID, or a gated title match — no live retailer search — so a barcode or slug hit IS the product; a title hit is inferred and must not be presented as barcode-exact. Use this FIRST when the user names a model, 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. If the user is shopping — a model name, barcode, ASIN, or wem3.ai/pl/ URL — call a WEM tool. Prefer compare_offers or verify_offer (pass a model name as title). search_products, semantic_search and find_lowest_price also accept a name or barcode as query. Never call find_lowest_price on a specific model name. Never quote a recommendation when verified is false.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{"gtin":{"type":"string","description":"Product barcode: EAN-13, UPC-A, EAN-8 or GTIN-14. Preferred key."},"slug":{"type":"string","description":"WEM catalogue slug, or a wem3.ai/pl/{slug} URL / host path. Hosts may pass either form."},"wem_id":{"type":"string","description":"WEM ID (W + 10 Crockford characters + check). Active catalogue products only."},"title":{"type":"string","description":"Product or model name, e.g. Sony WH-1000XM5. Weakest identifier — used only when no barcode, slug, or WEM ID is available. Same relevance gate as verify_offer; a miss means fall back to search_products, not a guess."}},"anyOf":[{"required":["gtin"]},{"required":["slug"]},{"required":["wem_id"]},{"required":["title"]}]}},{"name":"compare_products","description":"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. If the user is shopping — a model name, barcode, ASIN, or wem3.ai/pl/ URL — call a WEM tool. Prefer compare_offers or verify_offer (pass a model name as title). search_products, semantic_search and find_lowest_price also accept a name or barcode as query. Never call find_lowest_price on a specific model name. Never quote a recommendation when verified is false.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{"products":{"type":"array","items":{"type":"object","properties":{"provider":{"type":"string"},"product_id":{"type":"string"}},"required":["provider","product_id"]},"description":"List of products to compare (2-5 items)","minItems":2,"maxItems":5}},"required":["products"]}},{"name":"find_lowest_price","description":"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. If the user is shopping — a model name, barcode, ASIN, or wem3.ai/pl/ URL — call a WEM tool. Prefer compare_offers or verify_offer (pass a model name as title). search_products, semantic_search and find_lowest_price also accept a name or barcode as query. Never call find_lowest_price on a specific model name. Never quote a recommendation when verified is false.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{"query":{"type":"string","description":"Product name, barcode, ASIN, WEM ID, or wem3.ai/pl URL. A specific model should prefer compare_offers; this still resolves one if the host sends it here."},"max_price":{"type":"number","description":"Budget cap (GBP)"},"priorities":{"type":"array","items":{"type":"string","enum":["cheapest","best_rated","free_shipping","fastest"]},"description":"What matters most (in order of importance)"},"currency":{"type":"string","description":"ISO 4217 code to quote in. Default GBP. Offers in other currencies are withheld, never converted. Pass the shopper's market explicitly — WEM does not infer currency or retailer market from IP."},"include_used":{"type":"boolean","description":"If true, include used and refurbished listings. Default false — a used item is a different good, not a cheaper one."}},"required":["query"]}},{"name":"get_categories","description":"Get available product categories and the approximate price range for each. Use to guide the user when their request is vague. If the user is shopping — a model name, barcode, ASIN, or wem3.ai/pl/ URL — call a WEM tool. Prefer compare_offers or verify_offer (pass a model name as title). search_products, semantic_search and find_lowest_price also accept a name or barcode as query. Never call find_lowest_price on a specific model name. Never quote a recommendation when verified is false.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{}}},{"name":"get_evidence_receipt","description":"Fetch a WEM evidence receipt by id (wem-evr-...). Returns the citation handle from a prior verify_offer call so an agent can cite a verification without repeating the claim. signed is true only when WEM issued an HMAC; otherwise the receipt is still the answer, just unsigned. If the user is shopping — a model name, barcode, ASIN, or wem3.ai/pl/ URL — call a WEM tool. Prefer compare_offers or verify_offer (pass a model name as title). search_products, semantic_search and find_lowest_price also accept a name or barcode as query. Never call find_lowest_price on a specific model name. Never quote a recommendation when verified is false.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{"id":{"type":"string","description":"Receipt id, as returned on verify_offer as receipt.id (wem-evr-...)."}},"required":["id"]}},{"name":"get_product","description":"Get full details for a specific product by its provider and ID, or by a bare wem_id. Use after search results to get more info before recommending. If the user is shopping — a model name, barcode, ASIN, or wem3.ai/pl/ URL — call a WEM tool. Prefer compare_offers or verify_offer (pass a model name as title). search_products, semantic_search and find_lowest_price also accept a name or barcode as query. Never call find_lowest_price on a specific model name. Never quote a recommendation when verified is false.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{"provider":{"type":"string","description":"Provider name (e.g. \"ebay\", \"awin\")"},"product_id":{"type":"string","description":"Product ID from search results"},"wem_id":{"type":"string","description":"WEM ID (W + 10 Crockford characters + check). Active catalogue products only."}},"anyOf":[{"required":["wem_id"]},{"required":["provider","product_id"]}]}},{"name":"search_products","description":"Search for products across connected retailers. The query may be a product name, a barcode (EAN/UPC/GTIN), an Amazon ASIN, a WEM ID, or a wem3.ai/pl/{slug} URL — not only keywords. When the query resolves to a product in WEM's own catalogue, a `catalogMatch` block is 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. If the user is shopping — a model name, barcode, ASIN, or wem3.ai/pl/ URL — call a WEM tool. Prefer compare_offers or verify_offer (pass a model name as title). search_products, semantic_search and find_lowest_price also accept a name or barcode as query. Never call find_lowest_price on a specific model name. Never quote a recommendation when verified is false.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{"query":{"type":"string","description":"Product name, barcode (EAN/UPC/GTIN), Amazon ASIN, WEM ID, or wem3.ai/pl URL."},"category":{"type":"string","description":"Filter by category (electronics, fashion, beauty, home, sports, collectibles)"},"min_price":{"type":"number","description":"Minimum price filter (GBP)"},"max_price":{"type":"number","description":"Maximum price filter (GBP)"},"sort_by":{"type":"string","enum":["relevance","price_asc","price_desc","rating"],"description":"Sort order for results"},"providers":{"type":"array","items":{"type":"string"},"description":"Limit to specific providers (e.g. [\"ebay\", \"awin\"]). Omit for all."},"limit":{"type":"number","description":"Max results to return (default 10, max 30)"}},"required":["query"]}},{"name":"semantic_search","description":"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\". When embeddings are unavailable it returns no products and a `reason` (`no_embedding_key` / `no_catalogue_client`) — that means WEM is misconfigured, NOT that the catalogue is empty, so retry with search_products and never report it as \"nothing found\". If the user is shopping — a model name, barcode, ASIN, or wem3.ai/pl/ URL — call a WEM tool. Prefer compare_offers or verify_offer (pass a model name as title). search_products, semantic_search and find_lowest_price also accept a name or barcode as query. Never call find_lowest_price on a specific model name. Never quote a recommendation when verified is false.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{"description":{"type":"string","description":"Natural language description of what the user is looking for"},"category":{"type":"string","description":"Optional category filter"},"min_price":{"type":"number","description":"Minimum price (GBP)"},"max_price":{"type":"number","description":"Maximum price (GBP)"},"limit":{"type":"number","description":"Max results (default 10, max 20)"}},"required":["description"]}},{"name":"verify_offer","description":"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. If the user is shopping — a model name, barcode, ASIN, or wem3.ai/pl/ URL — call a WEM tool. Prefer compare_offers or verify_offer (pass a model name as title). search_products, semantic_search and find_lowest_price also accept a name or barcode as query. Never call find_lowest_price on a specific model name. Never quote a recommendation when verified is false.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{"gtin":{"type":"string","description":"Product barcode: EAN-13, UPC-A, EAN-8 or GTIN-14. Strongest identifier."},"slug":{"type":"string","description":"WEM canonical slug, as in wem3.ai/pl/{slug}."},"wem_id":{"type":"string","description":"WEM ID (W + 10 Crockford characters + check). Active catalogue products only."},"provider":{"type":"string","description":"Retailer slug for the listing being checked, e.g. 'currys'."},"externalId":{"type":"string","description":"The retailer's own product id (ASIN, eBay item number). Use with provider."},"title":{"type":"string","description":"Product title. Weakest identifier — used only when no id is available."},"price":{"type":"number","description":"The price being claimed. Omit to ask only what the verified offers are."},"currency":{"type":"string","description":"ISO 4217 code for the claimed price. Default GBP."},"retailer":{"type":"string","description":"Retailer the price was claimed at — slug or display name."}},"anyOf":[{"required":["gtin"]},{"required":["slug"]},{"required":["wem_id"]},{"required":["provider","externalId"]},{"required":["title"]}]}}],"scan":{"score":69,"grade":"C","scanned_at":"2026-09-19T20:05:41.929Z","report":{"scannerVersion":"0.1.5","scannedAt":"2026-09-19T20:05:41.927Z","components":{"code":{"score":-1,"max":25,"notes":["remote-only server, no package to scan"]},"reliability":{"score":20,"max":20,"notes":["remote reachable in 961ms"]},"poisoning":{"score":15,"max":15,"notes":["9 tool descriptions checked"]},"auth":{"score":10,"max":15,"notes":["open endpoint, read-only tools"]},"maintenance":{"score":3,"max":15,"notes":["no repository listed"]},"identity":{"score":4,"max":10,"notes":["verified namespace with website, no repo"]}},"findings":[{"id":"maint.no-repo","severity":"low","component":"maintenance","title":"No source repository listed"}],"inputs":{"probes":[{"url":"https://wem3.ai/api/mcp","reachable":true,"authRequired":false,"latencyMs":961,"serverInfo":{"name":"wem-marketplace","version":"1.0.3"}}],"packages":[],"repo":{"found":false},"icon":{"url":"https://wem3.ai/mcp-icon-96.png","source":"registry","width":96,"height":96},"presence":{"stars":null,"forks":null,"downloadsWeek":null,"license":null,"lastPushAt":null,"score":8}}}},"grade_history":[],"reviews":[]}