How do I determine the grade of my coin?

You can use the `calculate_sheldon_grade` tool. Provide details regarding the wear percentage, luster, strike quality, and surface marks to receive a Sheldon scale grade.

Does this tool account for precious metal prices?

Yes. When using `estimate_coin_value`, you provide the current spot price, and the tool will calculate both the numismatic value and the melt value.

Can I get technical details about specific coins?

Yes, the `get_coin_metadata` tool provides technical specifications such as metal content and weight for supported US coin types.

Numismatic Grading & Value Estimator MCP Connector for Claude

A+

Calculate Sheldon grades and market values for US coins.

3 tools Official Updated Oct 1, 2026 Official Vinkius Partner

More Details Connect to Claude

This MCP server provides professional-grade numismatic analysis for US coinage. Use calculate_sheldon_grade to determine a coin's numerical grade and adjectival label based on physical condition like wear and luster. Use estimate_coin_value to calculate market value and melt value using current spot prices. You can also use get_coin_metadata to retrieve technical specifications like metal content and weight for specific denominations.

coinsnumismaticsgradingus-coinsvaluation

Connect to Claude

Subscribe on Vinkius, then add this connector to Claude.ai or Claude Code.

① Claude.ai (web app)

Go to Settings → Connectors → Add custom connector
Paste the MCP endpoint URL below

https://edge.vinkius.com/vk_preview_EUd1O3i8an1Wc7pr93e0je9qlww9nQY6ZT8aOZ3K/mcp

② Claude Code (terminal)

claude mcp add --transport http numismatic-grading-value-estimator https://edge.vinkius.com/vk_preview_EUd1O3i8an1Wc7pr93e0je9qlww9nQY6ZT8aOZ3K/mcp

③ Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "numismatic-grading-value-estimator": {
      "url": "https://edge.vinkius.com/vk_preview_EUd1O3i8an1Wc7pr93e0je9qlww9nQY6ZT8aOZ3K/mcp"
    }
  }
}

Get full access on Vinkius

The preview token above works for testing. Powered by Vinkius.