io.github.cyanheads/calculator-mcp-server

io.github.cyanheads/calculator-mcp-server·v0.1.20·Other

Quality Score

/100

Calculator MCP server — evaluate, simplify, and differentiate math expressions.

Repository →Remote endpoint →

§01 Install

Remote endpoint

Streamable HTTP / SSE endpoint. Add to any MCP client that supports remote servers.

https://calculator.caseyjhand.com/mcp

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "calculator-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/calculator-mcp-server"
      ],
      "env": {
        "CALC_MAX_EXPRESSION_LENGTH": "1000",
        "CALC_EVALUATION_TIMEOUT_MS": "5000",
        "CALC_MAX_RESULT_LENGTH": "100000",
        "MCP_LOG_LEVEL": "info",
        "MCP_HTTP_HOST": "127.0.0.1",
        "MCP_HTTP_PORT": "3010",
        "MCP_HTTP_ENDPOINT_PATH": "/mcp",
        "MCP_AUTH_MODE": "none"
      }
    }
  }
}

Cursor (.cursor/mcp.json)

{
  "mcpServers": {
    "calculator-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/calculator-mcp-server"
      ],
      "env": {
        "CALC_MAX_EXPRESSION_LENGTH": "1000",
        "CALC_EVALUATION_TIMEOUT_MS": "5000",
        "CALC_MAX_RESULT_LENGTH": "100000",
        "MCP_LOG_LEVEL": "info",
        "MCP_HTTP_HOST": "127.0.0.1",
        "MCP_HTTP_PORT": "3010",
        "MCP_HTTP_ENDPOINT_PATH": "/mcp",
        "MCP_AUTH_MODE": "none"
      }
    }
  }
}

Cline (cline_mcp_settings.json)

npx -y @cyanheads/calculator-mcp-server

§02 Environment variables

CALC_MAX_EXPRESSION_LENGTH

Maximum allowed expression string length.

CALC_EVALUATION_TIMEOUT_MS

Maximum evaluation time in milliseconds.

CALC_MAX_RESULT_LENGTH

Maximum result string length in characters.

MCP_LOG_LEVEL

Sets the minimum log level for output (e.g., 'debug', 'info', 'warn').

CALC_MAX_EXPRESSION_LENGTH

Maximum allowed expression string length.

CALC_EVALUATION_TIMEOUT_MS

Maximum evaluation time in milliseconds.

CALC_MAX_RESULT_LENGTH

Maximum result string length in characters.

MCP_HTTP_HOST

The hostname for the HTTP server.

MCP_HTTP_PORT

The port to run the HTTP server on.

MCP_HTTP_ENDPOINT_PATH

The endpoint path for the MCP server.

MCP_AUTH_MODE

Authentication mode to use: 'none', 'jwt', or 'oauth'.

MCP_LOG_LEVEL

Sets the minimum log level for output (e.g., 'debug', 'info', 'warn').

§03 MCP Quality Score · methodology

freshness

completeness

installability

documentation

stability

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