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Crystal Suppliers MCP

Official registry Search and web

Search verified crystal bracelets and source beads, accessories, and raw materials.

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http crystal-suppliers-mcp 'https://ktcrystals.com/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "crystal-suppliers-mcp": {
            "type": "http",
            "url": "https://ktcrystals.com/mcp"
        }
    }
}
OCI package ghcr.io/ziyuant222/crystal-suppliers-mcp:0.1.0
Claude Code 
claude mcp add crystal-suppliers-mcp -- docker run -i --rm ghcr.io/ziyuant222/crystal-suppliers-mcp:0.1.0
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "crystal-suppliers-mcp": {
            "command": "docker",
            "args": [
                "run",
                "-i",
                "--rm",
                "ghcr.io/ziyuant222/crystal-suppliers-mcp:0.1.0"
            ]
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. Crystal Suppliers MCP
  2. Install and connect
  3. Tools
  4. Coverage contract
  5. Development

Crystal Suppliers MCP

Crystal Suppliers MCP is a read-only procurement server for KT Crystals. It searches a verified catalog of 104 crystal bracelet SKUs and provides traceable sourcing checklists for loose beads, crystal accessories, and raw crystal materials.

The service does not invent price, MOQ, inventory, lead time, treatment, origin, certification, or shipping claims. Commercial fields remain requires_manual_confirmation.

Install and connect

Run directly from the repository:

{
  "mcpServers": {
    "crystal-suppliers": {
      "command": "node",
      "args": ["/absolute/path/to/crystal-suppliers-mcp/src/index.mjs"]
    }
  }
}

Run the OCI image over stdio:

{
  "mcpServers": {
    "crystal-suppliers": {
      "command": "docker",
      "args": [
        "run",
        "--rm",
        "-i",
        "ghcr.io/ziyuant222/crystal-suppliers-mcp:0.1.0"
      ]
    }
  }
}

Start Streamable HTTP:

docker run --rm -p 3000:3000 \
  ghcr.io/ziyuant222/crystal-suppliers-mcp:0.1.0 --http

The endpoint is then http://localhost:3000/mcp, with health status at http://localhost:3000/health.

Tools

ToolPurpose
crystal_search_productsSearch real bracelet SKUs by SKU, name, material, or theme.
crystal_get_productRetrieve one verified bracelet and related catalog products.
crystal_list_materialsList normalized materials and verified bracelet SKU counts.
crystal_get_sourcing_guidanceGet supplier-verification checks for bracelets, beads, accessories, or raw materials.
crystal_build_procurement_shortlistKeep verified bracelet results separate from adjacent advisory categories.
crystal_prepare_inquiryValidate supplied SKUs and draft an inquiry without sending or storing it.

Coverage contract

  • verified_catalog: grounded in the current 104-SKU bracelet catalog.
  • advisory_only: sourcing guidance only; no verified SKU coverage for the requested category.
  • mixed: verified bracelet candidates plus separately labeled advisory categories.

Inquiry drafting is local and stateless. It does not send email, submit a form, write to a database, or retain buyer details.

Development

npm ci
npm test
npm run start:http

The server supports Node.js 22 or newer and implements MCP over both stdio and stateless Streamable HTTP.

Frequently asked questions

What is Crystal Suppliers MCP?

Search verified crystal bracelets and source beads, accessories, and raw materials.

How do I install Crystal Suppliers MCP?

It runs as a remote server. In Claude Code: claude mcp add --transport http crystal-suppliers-mcp 'https://ktcrystals.com/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Crystal Suppliers MCP need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is Crystal Suppliers MCP open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains Crystal Suppliers MCP?

It is published by ziyuant222. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.