How do I connect Calc MCP Server to Claude?

The listing records `claude mcp add -s user calc-mcp -- npx -y @coo-quack/calc-mcp@2.1.0` as its setup step. Run it, then follow the repository's instructions for the client configuration; the listing names Claude Desktop, Claude Code, Cursor as compatible clients.

Is Calc MCP Server free?

The listed licence is MIT. Check the upstream terms for permitted use and commercial requirements; a public repository does not by itself mean the software is free or open source. Connected APIs and hosted services may have separate charges.

What can Calc MCP Server do?

Calc MCP Server documents 21 tools to the agent, including base, base64, char_info. The descriptions above come from project documentation. A live handshake does not test individual tool behavior.

Calc MCP

Unclaimed

by coo-quack

MCP server with 21 tools for things AI is bad at — math, hashing, encoding, date arithmetic, and more.

Install

$claude mcp add -s user calc-mcp -- npx -y @coo-quack/calc-mcp@2.1.0

Set up this server

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This server needs project-specific setup. Follow the project instructions; no reusable public launch command is available yet.

Project instructions

ai-toolsbuncalculatormcpmcp-servertypescript

Is this your MCP server?

This listing was auto-indexed from the public record. Claim it to edit the page, set compatibility and unlock growth tools. Takes under two minutes.

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Security profile

Claimed and verified servers get a weekly static scan that shows what the code can reach: external services, environment variables, shell commands, agent configuration folders, plus any dependencies with known advisories. Claim this listing to get one. How the security profile works

21 of 21 tools

Documented tools (21)

From project documentation. A server handshake does not verify each tool’s description or behavior.

base

Number base conversion (2–36)

base64

Encode / decode

char_info

Unicode code point, block, category

color

HEX ↔ RGB ↔ HSL (alpha channel supported)

convert

8 categories, 146 unit names: length, weight, temperature, area (tsubo, tatami), volume, speed, data, time

count

Characters (grapheme-aware), words, lines, bytes

cron_parse

Human-readable cron + next runs (weekday/month names supported)

date

Diff, add/subtract, weekday, wareki

datetime

Current time, timezone conversion, UNIX timestamps

diff

Line diff, Levenshtein distance

encode

URL, HTML entity, Unicode escape

format_validate

Validate JSON, CSV, XML, YAML

hash

MD5, SHA-1, SHA-256, SHA-512, CRC32, HMAC

ip

IPv4/IPv6 info, CIDR contains check, range calculation

jwt_decode

Decode header + payload (no verification)

luhn

Validate / generate check digits

math

Evaluate expressions, statistics

random

UUID v4/v7, ULID, passwords (readable, custom charset), random number, shuffle

regex

Test, match, matchAll, replace

semver

Compare, validate, parse, range satisfaction

url_parse

Protocol, host, path, params, hash

Tool change history

Compared across complete checks of the same configuration. Tools were listed, not invoked. Input-schema changes are not measured here.

No complete tool checks yet.

FAQ

Questions about Calc MCP Server

How do I connect Calc MCP Server to Claude?: The listing records `claude mcp add -s user calc-mcp -- npx -y @coo-quack/calc-mcp@2.1.0` as its setup step. Run it, then follow the repository's instructions for the client configuration; the listing names Claude Desktop, Claude Code, Cursor as compatible clients.
Is Calc MCP Server free?: The listed licence is MIT. Check the upstream terms for permitted use and commercial requirements; a public repository does not by itself mean the software is free or open source. Connected APIs and hosted services may have separate charges.
What can Calc MCP Server do?: Calc MCP Server documents 21 tools to the agent, including base, base64, char_info. The descriptions above come from project documentation. A live handshake does not test individual tool behavior.