The category tree (open data, CC BY 4.0): 12 areas, each with its categories, every one with a stable id (cat_…), its slug, name and one-line definition, its page and how many listed products are in it and let our agent in on its own; categories with no product yet carry status planned and no page. Also the tags derived from each drive (MCP server, OpenAPI, llms.txt, free plan, a bot check met …) and the tree's release with its changes. A category's products: /categories/{slug}.json; filter them with GET /api/explore?area=…&category=…