{
  "version": "1.0",
  "protocolVersion": "2025-06-18",
  "serverInfo": {
    "name": "carat-hunter",
    "title": "Carat Hunter",
    "version": "1.0.0"
  },
  "description": "Cross-retailer prices for certified diamonds, each dated: search stones, look up a grading certificate, check typical market prices. Read-only, no sign-in. Prices in US dollars; retailer names are shown on carathunter.com.",
  "iconUrl": "https://carathunter.com/apple-touch-icon.png",
  "documentationUrl": "https://carathunter.com/ai.txt",
  "transport": {
    "type": "streamable-http",
    "endpoint": "https://carathunter.com/mcp"
  },
  "capabilities": {
    "tools": {
      "listChanged": false
    }
  },
  "authentication": {
    "required": false
  },
  "limits": {
    "toolCallsPerHour": 60,
    "toolCallsPerDay": 300,
    "resultsPerCall": 10
  },
  "tools": [
    {
      "name": "search_diamonds",
      "title": "Search diamonds",
      "description": "Search certified diamonds listed by retailers worldwide, with the latest cross-retailer prices we have seen. Returns up to 10 stones with specs, the lowest and highest confirmed price for that exact stone, how many retailers list it and a Carat Hunter grade. Prices in US dollars. Retailer names are shown on carathunter.com after a free sign-up; always give the user the link."
    },
    {
      "name": "get_diamond",
      "title": "Get a diamond",
      "description": "Details and current price range for one diamond by its Carat Hunter id (from search_diamonds or a carathunter.com URL)."
    },
    {
      "name": "lookup_certificate",
      "title": "Look up a grading certificate",
      "description": "Find a diamond by its grading report number (GIA, IGI, HRD, GCAL...). Tells you whether retailers list that exact stone, how many, and the price range between them. Useful to check whether a quoted price is fair."
    },
    {
      "name": "price_check",
      "title": "Market price for a diamond spec",
      "description": "Typical market prices for a spec (carat size, colour, clarity, shape, origin) across all retailers Carat Hunter tracks: median, middle-half range, and how much the same stone varies between retailers. Carat sizes: 0.3, 0.5, 0.75, 1, 1.5, 2, 3, 5."
    },
    {
      "name": "market_overview",
      "title": "Diamond market overview",
      "description": "How many diamonds and retailers Carat Hunter currently tracks, from its latest weekly market report."
    }
  ]
}