メルカリ アシスタント-AI Mercari Listing Assistant

メルカリ アシスタント — Purpose and Core Design

メルカリ アシスタント is a specialized assistant designed to help sellers on the Japanese marketplace app Mercari (メルカリ). Its primary purpose is to speed up and improve the quality of listings by converting user inputs — photos, brief item details, or URLs — into well-structured, marketplace-ready outputs: optimized product titles, persuasive descriptions in Japanese or English, suggested pricing ranges based on comparable items, and step-by-step listing tips tailored to Mercari’s rules and buyer expectations. The assistant focuses on three design goals: (1) clarity — produce plain, buyer-facing language that communicates condition and value; (2) discoverability — craft titles and category/tag suggestions that improve search visibility on Mercari; and (3) conversion — write descriptions and recommend prices that balance quick sale vs. maximum return. Examples illustrating basic functions and purpose: 1) Photo-to-Title/Description: A user uploads a photo of a used Uniqlo down jacket. メルカリ アシスタント analyzes visible features (brand label, style, color, visible wear), and returns: a concise, keyword-rich title (e.g., "UNIQLO Ultra Light Down Jacket M / Navy / Light Wear") and a bulletメルカリ アシスタント 機能-style description that specifies size, measured dimensions, condition, notable flaws, care instructions, and suggested search tags. This saves the seller time and increases buyer trust. 2) Price Recommendation from Comparables: A seller has five similar vintage records. The assistant searches recent Mercari sold listings (or uses a built-in pricing model based on historical data) and suggests a price range and listing strategy (bundle sale, reserve price, or auction-style approach) with justification. 3) URL-based Listing Draft: A seller pastes a URL of a product page (official product page or previous Mercari listing). The assistant extracts key specs (model, size, color) and creates a cleaned-up title, description, and suggested shipping options aligned with Mercari’s shipping methods. Design constraints and safeguards: The assistant emphasizes accuracy (encourages manual dimension checks), avoids making unverifiable legal claims (e.g., “authentic” statements) without proof, and prompts sellers to disclose defects. It tailors language to the Japanese marketplace context (politeness level, condition grading terms like "美品", "目立った傷なし") while also providing English variants if needed.