Moissanite Tools MCP Server

by fitiny Your server? Claim it

answering

Moissanite Tools is answering right now. Last checked 13 min ago. It exposes 6 tools. Last commit 28 Aug 2026.

FITINY jewellery tools: density-corrected carat/mm, GIA grades, ISO 8653 ring sizes

Uptime history 26 days of history · worst day 90%

26 days agonow

91.2%

Uptime 24h

83 of 91 checks

Tools

read from the server

146 ms

Response time

average over 24h

Stars

last commit 28 Aug 2026

Moissanite Tools does not always answer

Over the last week it answered 97.7% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 13 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add moissanite-tools --transport http https://mcp.fitiny.com/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "moissanite-tools": {
      "url": "https://mcp.fitiny.com/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.moissanite-tools]
url = "https://mcp.fitiny.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "moissanite-tools": {
      "url": "https://mcp.fitiny.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "moissanite-tools": {
      "url": "https://mcp.fitiny.com/mcp"
    }
  }
}

This endpoint answered with an authorization challenge. The server is running, but it did not say what kind of credentials it expects.

Available tools 6

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

carat

carat_to_mm

Diameter in millimetres for a given carat weight. Round brilliant cut. Density-corrected per stone - a diamond chart is wrong for moissanite by ~9%.

mm_to_carat

Carat weight for a given diameter in millimetres. Round brilliant cut.

grading

grading_scale

GIA colour (D-K) or clarity (FL-SI) scale as used for moissanite, or published optical constants for moissanite / diamond / cubic zirconia.

necklace

necklace_length

Where a necklace of a given length sits, with the trade name (choker, princess, matinee...).

ring

ring_size_convert

Convert a ring size between US, UK, EU (ISO 8653) and inner diameter in mm. A US 6 is a UK M, not a UK 6.

stud

stud_appearance

How a round stud of a given stone diameter reads on the ear.

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.fitiny.com/mcp	streamable-http	needs auth	251 ms	13 min ago

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Moissanite Tools — questions

Answers built from our own checks of this server.

What can Moissanite Tools do?

It exposes 6 tools, read directly from the server on our last check. Among them: carat_to_mm, grading_scale, mm_to_carat, necklace_length, ring_size_convert, stud_appearance. 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 Moissanite Tools working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 83 of 91 checks got a reply (91.2%), average response time 146 ms. The bar chart above shows every period we have measured.

How do I connect Moissanite Tools?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address. You will need your own credentials: it refuses anonymous clients.

Does Moissanite Tools need an API key?

Yes. Every time we knock, Moissanite Tools answers with an authorization challenge instead of its tool list — that is how we know it is running and gated rather than broken. Bring your own credentials and it will talk.

How fast is Moissanite Tools?

It answers our handshake in 146 ms on average, which is faster than 87% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Moissanite Tools open source?

Yes — it is published under the MIT licence, written in JavaScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.