Carat Hunter
REMOTE · CARATHUNTER.COM · SCANNED SEP 28
Live prices for one certified diamond across 100+ retailers: search, cert lookup, market prices.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security80
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability72
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 504 tokens (~100/item across 5 items; 5 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management10
- Stability observed for 3 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage69
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 6% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 5 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities60
- Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28. See how to fix → Fail
How do I install the Carat Hunter MCP server?
Carat Hunter is a hosted endpoint at https://carathunter.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · carathunter.com
claude mcp add --transport http com-carathunter-diamond-prices 'https://carathunter.com/mcp'
{
"mcpServers": {
"com-carathunter-diamond-prices": {
"url": "https://carathunter.com/mcp"
}
}
} {
"servers": {
"com-carathunter-diamond-prices": {
"type": "http",
"url": "https://carathunter.com/mcp"
}
}
} [mcp_servers.com-carathunter-diamond-prices] url = "https://carathunter.com/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"com-carathunter-diamond-prices": {
"type": "remote",
"url": "https://carathunter.com/mcp",
"enabled": true
}
}
} openclaw mcp add com-carathunter-diamond-prices --url 'https://carathunter.com/mcp' --transport streamable-http
mcp_servers:
com-carathunter-diamond-prices:
url: "https://carathunter.com/mcp" {
"McpServers": {
"com-carathunter-diamond-prices": {
"Transport": "http",
"Url": "https://carathunter.com/mcp"
}
}
} assistant mcp add com-carathunter-diamond-prices -t streamable-http -u 'https://carathunter.com/mcp'
{
"mcpServers": {
"com-carathunter-diamond-prices": {
"type": "http",
"url": "https://carathunter.com/mcp"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 28 Sept 26 +7
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 26 Sept 26 +1
- Stability: unverified → 0.03 ▲ functional
- 25 Sept 26 62
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 28 Sept 2026 · Probed https://carathunter.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=carathunter.com | CN=WE1,O=Google Trust Services,C=US | 12 Aug 2026 | 10 Nov 2026 | ECDSA 256 | ECDSA-SHA256 | 3c015499672c92fd13e23a4279ccdc63 |
| SANs: carathunter.com, *.carathunter.com | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of carathunter.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| carathunter.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=63072000; includeSubDomains; preload |
| x-content-type-options | nosniff |
| x-frame-options | DENY |
| referrer-policy | strict-origin-when-cross-origin |
| permissions-policy | camera=(), microphone=(), geolocation=() |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://carathunter.com/mcp | Verified | 200 | |
| http (plaintext) | http://carathunter.com/mcp | HTTPS enforced | 301 | https://carathunter.com/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
get_diamond Get a diamond ~44
Details and live price range for one diamond by its Carat Hunter id (from search_diamonds or a carathunter.com URL).
| Name | Type | Req | Description |
|---|---|---|---|
| id | integer | yes | – |
No output schema declared.
No examples provided.
lookup_certificate Look up a grading certificate ~67
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 | Type | Req | Description |
|---|---|---|---|
| certificate_number | string | yes | – |
No output schema declared.
No examples provided.
market_overview Diamond market overview ~27
How many diamonds and retailers Carat Hunter currently tracks, from its latest weekly market report.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
price_check Market price for a diamond spec ~123
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 | Type | Req | Description |
|---|---|---|---|
| carat | number | yes | – |
| clarity | string | yes | – |
| colour | string | yes | – |
| origin | string | yes | – |
| shape | string | yes | – |
No output schema declared.
No examples provided.
search_diamonds Search diamonds ~174
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.
| Name | Type | Req | Description |
|---|---|---|---|
| clarity | array | – | – |
| colour | array | – | e.g. ["E","F","G"] |
| max_carat | number | – | – |
| max_price_usd | number | – | – |
| min_carat | number | – | – |
| min_price_usd | number | – | – |
| origin | string | – | – |
| page | integer | – | – |
| shape | string | – | – |
| sort | string | – | – |
No output schema declared.
No examples provided.
What is the Carat Hunter MCP server?
Carat Hunter is an MCP server listed in the public MCP registry as com.carathunter/diamond-prices. Live prices for one certified diamond across 100+ retailers: search, cert lookup, market prices. This page covers its hosted endpoint (https://carathunter.com/mcp).
Is the Carat Hunter MCP server safe to use?
Carat Hunter scores 70 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Carat Hunter MCP server expose?
Carat Hunter exposes 5 tools: search_diamonds, get_diamond, lookup_certificate, price_check, market_overview. Their descriptions and schemas cost roughly 435 tokens of context every time the server is loaded.
Does the Carat Hunter MCP server require authentication?
No. We connected to Carat Hunter without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Carat Hunter MCP server still maintained?
Carat Hunter is still listed as active in the MCP registry. We last reached this channel on 28 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.