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calculator-mcp-server
CommunityMCP server by cyanheads · updated · ★ 2 · 136 downloads a week
Evaluate, simplify, and differentiate mathematical expressions. calculator-mcp-server is a community project by cyanheads, not verified by a company domain.
Last commit 14 days ago
Apache-2.0: permissive, fine for commercial use
Clear description, published package or server URL, original repository
No risky patterns in the files we checked
What you need
| Setting | Needed | What it is |
|---|---|---|
CALC_Environment variable | Optional | Maximum allowed expression string length. Default: 1000 |
CALC_Environment variable | Optional | Maximum evaluation time in milliseconds. Default: 5000 |
CALC_Environment variable | Optional | Maximum result string length in characters. Default: 100000 |
MCP_Environment variable | Optional | Sets the minimum log level for output (e.g., 'debug', 'info', 'warning'). Default: info |
From the publisher's entry in the official MCP Registry. Required settings are already in the install config below as placeholders.
Install calculator-mcp-server
Built from the published package, never by AIclaude mcp add calculator-mcp-server -- npx -y @cyanheads/calculator-mcp-serverRun in your terminal. Add --scope user to use it in every project.
{
"mcpServers": {
"calculator-mcp-server": {
"command": "npx",
"args": [
"-y",
"@cyanheads/calculator-mcp-server"
]
}
}
}Settings, Developer, Edit config. Paste into claude_desktop_config.json and restart.
Step-by-step: install calculator-mcp-server in Claude Desktop
{
"mcpServers": {
"calculator-mcp-server": {
"command": "npx",
"args": [
"-y",
"@cyanheads/calculator-mcp-server"
]
}
}
}Add to ~/.cursor/mcp.json (all projects) or .cursor/mcp.json (this project).
{
"servers": {
"calculator-mcp-server": {
"command": "npx",
"args": [
"-y",
"@cyanheads/calculator-mcp-server"
]
}
}
}Add to .vscode/mcp.json. VS Code uses "servers", not "mcpServers".
codex mcp add calculator-mcp-server -- npx -y @cyanheads/calculator-mcp-server{
"mcpServers": {
"calculator-mcp-server": {
"command": "npx",
"args": [
"-y",
"@cyanheads/calculator-mcp-server"
]
}
}
}Add to ~/.gemini/config/mcp_config.json (all projects) or .agents/mcp_config.json (this project).
Step-by-step: install calculator-mcp-server in Antigravity CLI
gemini mcp add calculator-mcp-server npx -y @cyanheads/calculator-mcp-serverGemini CLI was replaced by Antigravity CLI in June 2026 and remains only for enterprise licences and paid API keys.
MCP servers run with your permissions and can read what you give them access to. Some need an API key: check the README and add it under env in the calculator-mcp-server block.
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Security check
ANo download-and-run commands, hidden instructions or signs of sending keys out were found.
Checked automatically: README.md, package.json. This looks for known risky patterns and is not a full audit. How grades work
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calculator-mcp-server: common questions
How do I install calculator-mcp-server?
In Claude Code run claude mcp add calculator-mcp-server -- npx -y @cyanheads/calculator-mcp-server. For Claude Desktop, Cursor and VS Code, paste the config shown above and restart. See the install guides.
Is calculator-mcp-server the official server?
calculator-mcp-server is a community project by cyanheads, not verified by a company domain.
Is calculator-mcp-server free?
The code is published under the Apache-2.0 licence. The service it connects to may have its own pricing.
Is calculator-mcp-server safe to use?
It scores 75 of 100. Grades: maintenance A, licence A, quality C. Security check: grade A, no risky patterns found in the files checked. Review the code before you install. How grades work.
What are alternatives to calculator-mcp-server?
Similar MCP servers: Jay Code, Apple Health, codescene-mcp-server, IBGE Brasil MCP.
Does calculator-mcp-server work with ChatGPT?
Yes. Add its server URL in ChatGPT as a custom connector. See MCP in ChatGPT.