SERVER

Calculator MCP Server

Rank #4,435

io.github.cyanheads/calculator-mcp-server

Evaluate, simplify, and differentiate mathematical expressions.

33 versions

1 GitHub stars

by cyanheads (135 servers)View repository ↗Claim this server

First listed

Mar 29, 2026

Last publish date

Sep 19, 2026

OVERVIEW

Calculator MCP Server is a Model Context Protocol (MCP) server published by cyanheads. It ranks #4,435 of 132,608 servers tracked on MCP Toplist, and its repository has 1 GitHub stars. Calculator MCP Server is listed across 4 registries — Official MCP, PulseMCP, Smithery and Glama, with 33 tracked versions. It was first listed on Mar 29, 2026 and most recently updated on Sep 19, 2026.

STANDING

#4,435of 132,608 tracked serversTop 5%

Ranks ahead of 128,173 of 132,608 servers on MCP Toplist.

CONNECT

Use Calculator MCP Server

No setupRuns out of the box

No credentials or required configuration declared — add it to your MCP client and go.

Remote · HTTP

claude mcp add --transport http calculator-mcp-server https://calculator.caseyjhand.com/mcp

npm package

claude mcp add calculator-mcp-server -e "CALC_MAX_EXPRESSION_LENGTH=<your CALC_MAX_EXPRESSION_LENGTH>" -e "CALC_EVALUATION_TIMEOUT_MS=<your CALC_EVALUATION_TIMEOUT_MS>" -e "CALC_MAX_RESULT_LENGTH=<your CALC_MAX_RESULT_LENGTH>" -e "MCP_LOG_LEVEL=<your MCP_LOG_LEVEL>" -- npx -y @cyanheads/calculator-mcp-server run start:stdio

Replace each placeholder with your own value before saving.

npm package

claude mcp add calculator-mcp-server -e "CALC_MAX_EXPRESSION_LENGTH=<your CALC_MAX_EXPRESSION_LENGTH>" -e "CALC_EVALUATION_TIMEOUT_MS=<your CALC_EVALUATION_TIMEOUT_MS>" -e "CALC_MAX_RESULT_LENGTH=<your CALC_MAX_RESULT_LENGTH>" -e "MCP_HTTP_HOST=<your MCP_HTTP_HOST>" -e "MCP_HTTP_PORT=<your MCP_HTTP_PORT>" -e "MCP_HTTP_ENDPOINT_PATH=<your MCP_HTTP_ENDPOINT_PATH>" -e "MCP_AUTH_MODE=<your MCP_AUTH_MODE>" -e "MCP_LOG_LEVEL=<your MCP_LOG_LEVEL>" -- npx -y @cyanheads/calculator-mcp-server run start:http

Replace each placeholder with your own value before saving.

Remote · HTTP

[mcp_servers.calculator-mcp-server]
url = "https://calculator.caseyjhand.com/mcp"

Add to ~/.codex/config.toml.

npm package

[mcp_servers.calculator-mcp-server]
command = "npx"
args = ["-y", "@cyanheads/calculator-mcp-server", "run", "start:stdio"]

[mcp_servers.calculator-mcp-server.env]
CALC_MAX_EXPRESSION_LENGTH = "<your CALC_MAX_EXPRESSION_LENGTH>"
CALC_EVALUATION_TIMEOUT_MS = "<your CALC_EVALUATION_TIMEOUT_MS>"
CALC_MAX_RESULT_LENGTH = "<your CALC_MAX_RESULT_LENGTH>"
MCP_LOG_LEVEL = "<your MCP_LOG_LEVEL>"

Add to ~/.codex/config.toml. Replace each placeholder with your own value before saving.

npm package

[mcp_servers.calculator-mcp-server]
command = "npx"
args = ["-y", "@cyanheads/calculator-mcp-server", "run", "start:http"]

[mcp_servers.calculator-mcp-server.env]
CALC_MAX_EXPRESSION_LENGTH = "<your CALC_MAX_EXPRESSION_LENGTH>"
CALC_EVALUATION_TIMEOUT_MS = "<your CALC_EVALUATION_TIMEOUT_MS>"
CALC_MAX_RESULT_LENGTH = "<your CALC_MAX_RESULT_LENGTH>"
MCP_HTTP_HOST = "<your MCP_HTTP_HOST>"
MCP_HTTP_PORT = "<your MCP_HTTP_PORT>"
MCP_HTTP_ENDPOINT_PATH = "<your MCP_HTTP_ENDPOINT_PATH>"
MCP_AUTH_MODE = "<your MCP_AUTH_MODE>"
MCP_LOG_LEVEL = "<your MCP_LOG_LEVEL>"

Add to ~/.codex/config.toml. Replace each placeholder with your own value before saving.

Remote · HTTP

https://calculator.caseyjhand.com/mcp

Settings → Connectors → “Add custom connector”, then paste this URL.

npm package

{
  "mcpServers": {
    "calculator-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/calculator-mcp-server",
        "run",
        "start:stdio"
      ],
      "env": {
        "CALC_MAX_EXPRESSION_LENGTH": "<your CALC_MAX_EXPRESSION_LENGTH>",
        "CALC_EVALUATION_TIMEOUT_MS": "<your CALC_EVALUATION_TIMEOUT_MS>",
        "CALC_MAX_RESULT_LENGTH": "<your CALC_MAX_RESULT_LENGTH>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Add to claude_desktop_config.json (Settings → Developer → Edit Config). Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "calculator-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/calculator-mcp-server",
        "run",
        "start:http"
      ],
      "env": {
        "CALC_MAX_EXPRESSION_LENGTH": "<your CALC_MAX_EXPRESSION_LENGTH>",
        "CALC_EVALUATION_TIMEOUT_MS": "<your CALC_EVALUATION_TIMEOUT_MS>",
        "CALC_MAX_RESULT_LENGTH": "<your CALC_MAX_RESULT_LENGTH>",
        "MCP_HTTP_HOST": "<your MCP_HTTP_HOST>",
        "MCP_HTTP_PORT": "<your MCP_HTTP_PORT>",
        "MCP_HTTP_ENDPOINT_PATH": "<your MCP_HTTP_ENDPOINT_PATH>",
        "MCP_AUTH_MODE": "<your MCP_AUTH_MODE>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Add to claude_desktop_config.json (Settings → Developer → Edit Config). Replace each placeholder with your own value before saving.

Remote · HTTP

{
  "mcpServers": {
    "calculator-mcp-server": {
      "url": "https://calculator.caseyjhand.com/mcp"
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project).

npm package

{
  "mcpServers": {
    "calculator-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/calculator-mcp-server",
        "run",
        "start:stdio"
      ],
      "env": {
        "CALC_MAX_EXPRESSION_LENGTH": "<your CALC_MAX_EXPRESSION_LENGTH>",
        "CALC_EVALUATION_TIMEOUT_MS": "<your CALC_EVALUATION_TIMEOUT_MS>",
        "CALC_MAX_RESULT_LENGTH": "<your CALC_MAX_RESULT_LENGTH>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project). Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "calculator-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/calculator-mcp-server",
        "run",
        "start:http"
      ],
      "env": {
        "CALC_MAX_EXPRESSION_LENGTH": "<your CALC_MAX_EXPRESSION_LENGTH>",
        "CALC_EVALUATION_TIMEOUT_MS": "<your CALC_EVALUATION_TIMEOUT_MS>",
        "CALC_MAX_RESULT_LENGTH": "<your CALC_MAX_RESULT_LENGTH>",
        "MCP_HTTP_HOST": "<your MCP_HTTP_HOST>",
        "MCP_HTTP_PORT": "<your MCP_HTTP_PORT>",
        "MCP_HTTP_ENDPOINT_PATH": "<your MCP_HTTP_ENDPOINT_PATH>",
        "MCP_AUTH_MODE": "<your MCP_AUTH_MODE>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project). Replace each placeholder with your own value before saving.

Remote · HTTP

{
  "servers": {
    "calculator-mcp-server": {
      "type": "http",
      "url": "https://calculator.caseyjhand.com/mcp"
    }
  }
}

Save as .vscode/mcp.json in your workspace.

npm package

{
  "servers": {
    "calculator-mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/calculator-mcp-server",
        "run",
        "start:stdio"
      ],
      "env": {
        "CALC_MAX_EXPRESSION_LENGTH": "<your CALC_MAX_EXPRESSION_LENGTH>",
        "CALC_EVALUATION_TIMEOUT_MS": "<your CALC_EVALUATION_TIMEOUT_MS>",
        "CALC_MAX_RESULT_LENGTH": "<your CALC_MAX_RESULT_LENGTH>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Save as .vscode/mcp.json in your workspace. Replace each placeholder with your own value before saving.

npm package

{
  "servers": {
    "calculator-mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/calculator-mcp-server",
        "run",
        "start:http"
      ],
      "env": {
        "CALC_MAX_EXPRESSION_LENGTH": "<your CALC_MAX_EXPRESSION_LENGTH>",
        "CALC_EVALUATION_TIMEOUT_MS": "<your CALC_EVALUATION_TIMEOUT_MS>",
        "CALC_MAX_RESULT_LENGTH": "<your CALC_MAX_RESULT_LENGTH>",
        "MCP_HTTP_HOST": "<your MCP_HTTP_HOST>",
        "MCP_HTTP_PORT": "<your MCP_HTTP_PORT>",
        "MCP_HTTP_ENDPOINT_PATH": "<your MCP_HTTP_ENDPOINT_PATH>",
        "MCP_AUTH_MODE": "<your MCP_AUTH_MODE>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Save as .vscode/mcp.json in your workspace. Replace each placeholder with your own value before saving.

Remote · HTTP

{
  "mcpServers": {
    "calculator-mcp-server": {
      "serverUrl": "https://calculator.caseyjhand.com/mcp"
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

npm package

{
  "mcpServers": {
    "calculator-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/calculator-mcp-server",
        "run",
        "start:stdio"
      ],
      "env": {
        "CALC_MAX_EXPRESSION_LENGTH": "<your CALC_MAX_EXPRESSION_LENGTH>",
        "CALC_EVALUATION_TIMEOUT_MS": "<your CALC_EVALUATION_TIMEOUT_MS>",
        "CALC_MAX_RESULT_LENGTH": "<your CALC_MAX_RESULT_LENGTH>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json. Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "calculator-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/calculator-mcp-server",
        "run",
        "start:http"
      ],
      "env": {
        "CALC_MAX_EXPRESSION_LENGTH": "<your CALC_MAX_EXPRESSION_LENGTH>",
        "CALC_EVALUATION_TIMEOUT_MS": "<your CALC_EVALUATION_TIMEOUT_MS>",
        "CALC_MAX_RESULT_LENGTH": "<your CALC_MAX_RESULT_LENGTH>",
        "MCP_HTTP_HOST": "<your MCP_HTTP_HOST>",
        "MCP_HTTP_PORT": "<your MCP_HTTP_PORT>",
        "MCP_HTTP_ENDPOINT_PATH": "<your MCP_HTTP_ENDPOINT_PATH>",
        "MCP_AUTH_MODE": "<your MCP_AUTH_MODE>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json. Replace each placeholder with your own value before saving.

Remote · HTTP

{
  "mcpServers": {
    "calculator-mcp-server": {
      "url": "https://calculator.caseyjhand.com/mcp"
    }
  }
}

npm package

{
  "mcpServers": {
    "calculator-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/calculator-mcp-server",
        "run",
        "start:stdio"
      ],
      "env": {
        "CALC_MAX_EXPRESSION_LENGTH": "<your CALC_MAX_EXPRESSION_LENGTH>",
        "CALC_EVALUATION_TIMEOUT_MS": "<your CALC_EVALUATION_TIMEOUT_MS>",
        "CALC_MAX_RESULT_LENGTH": "<your CALC_MAX_RESULT_LENGTH>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "calculator-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/calculator-mcp-server",
        "run",
        "start:http"
      ],
      "env": {
        "CALC_MAX_EXPRESSION_LENGTH": "<your CALC_MAX_EXPRESSION_LENGTH>",
        "CALC_EVALUATION_TIMEOUT_MS": "<your CALC_EVALUATION_TIMEOUT_MS>",
        "CALC_MAX_RESULT_LENGTH": "<your CALC_MAX_RESULT_LENGTH>",
        "MCP_HTTP_HOST": "<your MCP_HTTP_HOST>",
        "MCP_HTTP_PORT": "<your MCP_HTTP_PORT>",
        "MCP_HTTP_ENDPOINT_PATH": "<your MCP_HTTP_ENDPOINT_PATH>",
        "MCP_AUTH_MODE": "<your MCP_AUTH_MODE>",
        "MCP_LOG_LEVEL": "<your MCP_LOG_LEVEL>"
      }
    }
  }
}

Replace each placeholder with your own value before saving.

BADGE

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Markdown

[![MCP Toplist](https://mcptoplist.com/badge/io.github.cyanheads%2Fcalculator-mcp-server.svg)](https://mcptoplist.com/server/io.github.cyanheads%2Fcalculator-mcp-server)

HTML

<a href="https://mcptoplist.com/server/io.github.cyanheads%2Fcalculator-mcp-server"><img src="https://mcptoplist.com/badge/io.github.cyanheads%2Fcalculator-mcp-server.svg" alt="MCP Toplist: Top 5% of 132,608" /></a>

Variants: append ?metric=score or ?metric=stars to the image URL.

REGISTRIES

Listed on 4 registries

ORGANIZATION

cyanheads

Organization

cyanheads

Servers in org

135

Versions across org

2271

Other servers by cyanheads

View all cyanheads servers →

VERSIONS

Available versions (33)

Version	Published
0.4.3	Sep 19, 2026
0.4.2	Sep 13, 2026
0.4.1	Aug 22, 2026
0.4.0	Jul 2, 2026
0.3.5	Jun 20, 2026
0.3.4	Jun 15, 2026
0.3.3	Jun 15, 2026
0.3.2	Jun 4, 2026
0.3.1	Jun 2, 2026
0.3.0	May 31, 2026
0.2.0	May 31, 2026
0.1.26	May 30, 2026
0.1.25	May 29, 2026
0.1.24	May 23, 2026
0.1.23	May 23, 2026
0.1.22	May 16, 2026
0.1.21	May 5, 2026
0.1.20	Apr 29, 2026
0.1.19	Apr 29, 2026
0.1.18	Apr 29, 2026
0.1.17	Apr 28, 2026
0.1.16	Apr 28, 2026
0.1.15	Apr 28, 2026
0.1.14	Apr 28, 2026
0.1.13	Apr 27, 2026
0.1.12	Apr 27, 2026
0.1.11	Apr 24, 2026
0.1.10	Apr 21, 2026
0.1.9	Apr 15, 2026
0.1.8	Mar 30, 2026
0.1.7	Mar 30, 2026
0.1.6	Mar 30, 2026
0.1.0	Nov 25, 2024

FAQ

Frequently asked questions

Who maintains Calculator MCP Server?: Calculator MCP Server is maintained by cyanheads, which publishes 135 MCP servers (2271 total versions) tracked on MCP Toplist.
Is Calculator MCP Server listed on the Official MCP Registry?: Yes — Calculator MCP Server is listed on the Official MCP Registry, alongside PulseMCP, Smithery and Glama.
How many versions does Calculator MCP Server have?: MCP Toplist tracks 33 versions of Calculator MCP Server, most recently published on Sep 19, 2026.
Where can I find the source code for Calculator MCP Server?: The source code for Calculator MCP Server is hosted at github.com/cyanheads/calculator-mcp-server.

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