Carat Hunter MCP Server

by carathunter Your server? Claim it

answering

Carat Hunter is answering right now. Last checked 1 min ago. It exposes 5 tools.

Latest prices for one certified diamond across 100+ retailers: search, cert lookup, market prices.

Uptime history 38 days of history · worst day 98%

38 days agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

1137 ms

Response time

average over 24h

open, no key

Access

streamable-http

What changed 7

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 29 September 2026. No other catalogue keeps this.

23 Oct a tool description was rewritten price_check

22 Oct 4 tool descriptions were rewritten get_diamond, lookup_certificate, price_check and 1 more

29 Sep 2 tool descriptions were rewritten get_diamond, search_diamonds

Nothing serious here today

Today is the operative word: we check Carat Hunter every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 1 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add diamond-prices --transport http https://carathunter.com/mcp

Settings → Connectors → Add custom connector, then paste this address

https://carathunter.com/mcp

~/.codex/config.toml

[mcp_servers.diamond-prices]
url = "https://carathunter.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "diamond-prices": {
      "url": "https://carathunter.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "diamond-prices": {
      "type": "http",
      "url": "https://carathunter.com/mcp"
    }
  }
}

Available tools 5

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

diamond

get_diamond

Details and the latest confirmed price range for one diamond, with the date we last saw it, by its Carat Hunter id (from search_diamonds or a carathunter.com URL).

diamonds

search_diamonds

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 with the date we last saw them, 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.

lookup

lookup_certificate

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 as of the date we last saw it. Useful to check whether a quoted price is fair.

market

market_overview

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

price

price_check

Typical listed prices for a spec (carat size, colour, clarity, shape, origin) across all retailers Carat Hunter tracks, with the day they were measured: 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.

Endpoints

URL	Transport	State	Latency	Checked
https://carathunter.com/mcp	streamable-http	answering	1197 ms	1 min ago

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Carat Hunter — questions

Answers built from our own checks of this server.

What can Carat Hunter do?

It exposes 5 tools, read directly from the server on our last check. Among them: get_diamond, lookup_certificate, market_overview, price_check, search_diamonds. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Carat Hunter working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 1137 ms. The bar chart above shows every period we have measured.

How do I connect Carat Hunter?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Carat Hunter need an API key?

No. Carat Hunter completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 5 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Carat Hunter?

It answers our handshake in 1137 ms on average, which is faster than 4% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.