Yes, Calculator is free to use.

How do I install Calculator?

Calculator supports both local and remote installation. For local use, install it via npm (npx) and add the configuration to your AI app. For remote access, add the server URL to your MCP configuration.

What credentials does Calculator need?

Calculator requires the following credentials or environment variables: CALC_MAX_EXPRESSION_LENGTH, CALC_EVALUATION_TIMEOUT_MS, CALC_MAX_RESULT_LENGTH, MCP_LOG_LEVEL, MCP_HTTP_HOST, MCP_HTTP_PORT, MCP_HTTP_ENDPOINT_PATH, MCP_AUTH_MODE. You can find setup instructions on the server detail page.

What AI apps work with Calculator?

Calculator uses the Model Context Protocol (MCP) and works with any MCP-compatible AI app, including Claude, ChatGPT / Codex, Gemini, Copilot, Cursor, and more.

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Calculator MCP Server

by Cyanheads

Developer ToolsLow Risk10.0MCP RegistryLocalRemote

Free

Server data from the Official MCP Registry

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

About

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

Remote endpoints: streamable-http: https://calculator.caseyjhand.com/mcp

Security Report

10.0

Low Risk10.0Low Risk

Valid MCP server (1 strong, 1 medium validity signals). No known CVEs in dependencies. Package registry verified. Imported from the Official MCP Registry. Trust signals: 3 highly-trusted packages.

1 tool verified · Open access · 1 issue found

Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.

Permissions Required

This plugin requests these system permissions. Most are normal for its category.

file_system

Check that this permission is expected for this type of plugin.

HTTP Network Access

Connects to external APIs or services over the internet.

What You'll Need

Set these up before or after installing:

Maximum allowed expression string length.Optional

Environment variable: CALC_MAX_EXPRESSION_LENGTH

Maximum evaluation time in milliseconds.Optional

Environment variable: CALC_EVALUATION_TIMEOUT_MS

Maximum result string length in characters.Optional

Environment variable: CALC_MAX_RESULT_LENGTH

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

Environment variable: MCP_LOG_LEVEL

The hostname for the HTTP server.Optional

Environment variable: MCP_HTTP_HOST

The port to run the HTTP server on.Optional

Environment variable: MCP_HTTP_PORT

The endpoint path for the MCP server.Optional

Environment variable: MCP_HTTP_ENDPOINT_PATH

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

Environment variable: MCP_AUTH_MODE

How to Install & Connect

Available as Local & Remote

This plugin can run on your machine or connect to a hosted endpoint. during install.

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Calculator MCP Server

About

Security Report

Findings (1)

Permissions Required

What You'll Need

How to Install & Connect

Reviews

No reviews yet

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