Install Calculator in Claude Code
This server doesn't publish a package to a registry, so follow the install steps in its README. Once it runs, register it with Claude Code:
claude mcp add calculator -- <command to start the server>Frequently asked questions
What does the Calculator MCP server do?
This server enables LLMs to use calculator for precise numerical calculations.
Is the Calculator MCP server free?
Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.
Does Calculator run locally or remotely?
Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.
How do I add Calculator to Claude Code?
Follow the install steps in the project's README at https://github.com/githejie/mcp-server-calculator, then register it with "claude mcp add".
More other tools & integrations MCP servers
View allOpenFate Bazi
openfate-ai/openfate-mcp
OpenFate Bazi MCP with True Solar Time, Four Pillars, Da Yun, and branch interactions.
Godot Enhanced
wgt19861219/godot-mcp-enhanced
Enhanced Godot 4.5-4.7 MCP: headless+editor+bridge, secure GDScript sandbox, closed-loop AI dev.
Asana
roychri/mcp-server-asana
Interact with the Asana API.
any-chat-completions
pyroprompts/any-chat-completions-mcp
Chat with any OpenAI SDK-compatible Chat Completions API, such as Perplexity, Groq and xAI.
Aftereffects
kumoproductions/mcp-aftereffects
MCP server for Adobe After Effects — comp/layer introspection, undo-grouped ops, frame rendering.
Funnel
chris-schra/mcp-funnel
MCP proxy that aggregates multiple servers with tool filtering and customization