# Carat Hunter

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

- name: com.carathunter/diamond-prices
- version: 1.0.1
- connection class: unknown (unknown)
- trust: 61/100 flags: no-repository
- quality: 85/100 (good)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/com.carathunter%2Fdiamond-prices
- tools: https://api.protogrid.dev/v1/servers/com.carathunter%2Fdiamond-prices/tools

**Not classified yet.** The remote endpoints have not been probed successfully, or the listing has nothing to connect to.

## Connection (mcpServers)

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


## Trust

- hygiene: 80
- liveness: 28
- freshness: 100
- provenance: 55
- drivers: +dns-namespace +website -unreachable(1 failures) +updated-21d-ago -no-repository
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 85/100 (good)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-06-18; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 86 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 5 of 5 tools declare readOnlyHint or destructiveHint
- fail `tools.directory_hints`: no tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: get_diamond (destructiveHint, idempotentHint); search_diamonds (destructiveHint, idempotentHint); market_overview (destructiveHint, idempotentHint); …
- pass `tools.token_cost`: about 763 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 100 (weight 15)

- pass `stability.changes`: 2 tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 5, about 763 tokens to load them all
- tool set hash: 75f113a3c677ea370e7c4a812576d398
- tools last changed: 2026-09-29T04:33:18.843Z
- badge: [![protogrid quality](https://protogrid.dev/badge/com.carathunter/diamond-prices.svg)](https://protogrid.dev/servers/com.carathunter/diamond-prices)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-09-29 `get_diamond` changed (description)
  - before: Details and live price range for one diamond by its Carat Hunter id (from search_diamonds or a carathunter.com URL).
  - after: Details and current price range for one diamond by its Carat Hunter id (from search_diamonds or a carathunter.com URL).
- 2026-09-29 `search_diamonds` changed (description)
  - before: 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.
  - after: 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.

Full history: https://api.protogrid.dev/v1/servers/com.carathunter%2Fdiamond-prices/changes

## Remotes

- https://carathunter.com/mcp (streamable-http, auth none, reachable false, uptime30d 0.9484536)

## Packages

_none_

## Tools (5)

- `get_diamond`: Details and current price range for one diamond by its Carat Hunter id (from search_diamonds or a carathunter.com URL).
- `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. Useful to check whether a quoted price is fair.
- `market_overview`: How many diamonds and retailers Carat Hunter currently tracks, from its latest weekly market report.
- `price_check`: 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.
- `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, 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.