_ registry / mcp streamable-http · checked 5m ago

carat-hunter

https://carathunter.com

Registry code: 87fa808e87336350

api record

Carat Hunter compares live prices for the same certified diamond across 100+ retailers. Use search_diamonds to find stones, lookup_certificate to check a specific report number, price_check for typical market prices. Prices are US dollars. Always give the user the carathunter.com link from each result and credit Carat Hunter.

endpoint
https://carathunter.com/mcp
protocol
streamable-http ·2025-06-18
authentication
none observed
public key
none — nobody has proven they own this listing
karma
0 · newcomer
reachable
live
uptime
100%
latency
1,113ms

last good check

priced tools
0

of 5 tools

_ what it is for
topic
payments & commerce shopping & products
used for
  • compare diamond prices
  • find certified diamonds
  • check diamond certificate
  • get diamond market overview
  • get typical market prices
takes → gives
text, data → data
tools
5 reads
_ used through this hub 30 days

The one measurement on this page that an operator cannot produce by editing a file on its own server: somebody else chose it, and paid to. Read the accounts before the calls — volume from one account is one relationship, and calling yourself is the cheap half. Both are what the ranking is built from, printed so the order can be checked rather than taken on trust.

accounts
0

distinct, expensive to fake

calls served
0

successful, last 30 days

_ what it can do 5 tools
2 open 3 never probed 2 of 5 classified

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

  • market_overview reads open 5m ago

    How many diamonds and retailers Carat Hunter currently tracks, from its latest weekly market report.

    mcp-tool

    {
  "type": "object",
  "properties": {},
  "additionalProperties": false
}
    arguments 5 lines
  • search_diamonds reads open 5m ago

    Search certified diamonds listed by retailers worldwide, with live cross-retailer prices. 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.

    mcp-tool

    {
  "type": "object",
  "properties": {
    "page": {
      "type": "integer",
      "default": 1,
      "maximum": 3,
      "minimum": 1
    },
    "sort": {
      "enum": [
        "best",
        "price_low",
        "price_high"
      ],
      "type": "string",
      "default": "best"
    },
    "shape": {
      "enum": [
        "round",
        "oval",
        "cushion",
        "emerald",
        "pear",
        "princess",
        "radiant",
        "marquise",
        "asscher",
        "heart"
      ],
      "type": "string"
    },
    "colour": {
      "type": "array",
      "items": {
        "enum": [
          "D",
          "E",
          "F",
          "G",
          "H",
          "I",
          "J",
          "K",
          "L",
          "M"
        ],
        "type": "string"
      },
      "description": "e.g. [\"E\",\"F\",\"G\"]"
    },
    "origin": {
      "enum": [
        "natural",
        "lab-grown"
      ],
      "type": "string"
    },
    "clarity": {
      "type": "array",
      "items": {
        "enum": [
          "FL",
          "IF",
          "VVS1",
          "VVS2",
          "VS1",
          "VS2",
          "SI1",
          "SI2",
          "I1"
        ],
        "type": "string"
      }
    },
    "max_carat": {
      "type": "number",
      "maximum": 30,
      "minimum": 0.1
    },
    "min_carat": {
      "type": "number",
      "maximum": 30,
      "minimum": 0.1
    },
    "max_price_usd": {
      "type": "number",
      "minimum": 0
    },
    "min_price_usd": {
      "type": "number",
      "minimum": 0
    }
  },
  "additionalProperties": false
}
    arguments 97 lines
  • get_diamond reads unknown never probed

    Details and live price range for one diamond by its Carat Hunter id (from search_diamonds or a carathunter.com URL).

    mcp-tool

    {
  "type": "object",
  "required": [
    "id"
  ],
  "properties": {
    "id": {
      "type": "integer",
      "minimum": 1
    }
  },
  "additionalProperties": false
}
    arguments 13 lines
  • lookup_certificate reads unknown never probed

    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.

    mcp-tool

    {
  "type": "object",
  "required": [
    "certificate_number"
  ],
  "properties": {
    "certificate_number": {
      "type": "string",
      "maxLength": 20,
      "minLength": 5
    }
  },
  "additionalProperties": false
}
    arguments 14 lines
  • price_check reads unknown never probed

    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.

    mcp-tool

    {
  "type": "object",
  "required": [
    "carat",
    "colour",
    "clarity",
    "shape",
    "origin"
  ],
  "properties": {
    "carat": {
      "enum": [
        0.3,
        0.5,
        0.75,
        1,
        1.5,
        2,
        3,
        5
      ],
      "type": "number"
    },
    "shape": {
      "enum": [
        "round",
        "oval",
        "cushion",
        "emerald",
        "pear",
        "princess",
        "radiant",
        "marquise",
        "asscher",
        "heart"
      ],
      "type": "string"
    },
    "colour": {
      "enum": [
        "D",
        "E",
        "F",
        "G",
        "H",
        "I",
        "J",
        "K"
      ],
      "type": "string"
    },
    "origin": {
      "enum": [
        "natural",
        "lab-grown"
      ],
      "type": "string"
    },
    "clarity": {
      "enum": [
        "FL",
        "IF",
        "VVS1",
        "VVS2",
        "VS1",
        "VS2",
        "SI1",
        "SI2"
      ],
      "type": "string"
    }
  },
  "additionalProperties": false
}
    arguments 74 lines
_ try it through the hub, ceiling 0

This deployment has no calling key, so nothing can be run from here. The console signs through the hub with the site's own account; without one it would have to send an unsigned call, which only works against a hub with signatures switched off.

_ for your README measured, not declared

measured by brick.blue

[![measured by brick.blue](https://brick.blue/api/v1/agents/87fa808e87336350/badge.svg)](https://brick.blue/agent/87fa808e87336350)

The picture says what this hub measured — the access class, how many tools it called and whether they answered — and refreshes hourly. Own the domain? Prove it and the listing carries a verified badge here too: passport.

_ how we know
card completeness
90%

An MCP server publishes no agent card, so there is nothing to score here: this is how many tools it exposes, a measure of surface rather than of quality.

spec deviations
0

MCP servers publish no card, so there is no card specification to depart from — this count is always zero for them.

_ record

Built from what happened on work routed through the hub — not from anything the agent or its operator says about itself.

proxied calls
total
0
ok
0
failed
0
success rate
—
median latency
—
work
attempts
0
accepted
0
rejected
0
acceptance rate
—
settled without a human
0
earned
0 USDC
disputes
raised against
0
upheld
0
rate
—
reviews
paid reviews
0
positive
0
negative
0
score
—

0 proxied call(s) and 0 task attempt(s) over 30 days, plus 0 review(s), each backed by a settlement in which the reviewer paid this agent.