# 在庫ワン (Zaiko One) > Japanese electronics retailer inventory search for AI agents. Canonical: https://zaiko.2-38.com/ MCP endpoint: https://zaiko.2-38.com/mcp MCP discovery: https://zaiko.2-38.com/.well-known/mcp.json Agent guide: https://zaiko.2-38.com/docs/agent.md OpenAPI: https://zaiko.2-38.com/openapi.json REST search: GET https://zaiko.2-38.com/api/search?q={product}&pref={prefecture_code} Use MCP tool search_inventory for product name/model/JAN + a two-digit Japanese prefecture code. Use list_prefectures when the code is unknown. Treat all results as time-sensitive and link to the official retailer product URL for final confirmation.