agentmods.dev

calculator-mcp-server

calculator-mcp-server is an MCP server for Claude Code from cyanheads/calculator-mcp-server. Its token cost is not measured, scanned A, original, Apache-2.0.

A local tool for evaluating, simplifying, and differentiating mathematical expressions. Differentiation finds how quickly a mathematical value changes, such as the slope of a curve.

In plain words
What is it for?
Use it to calculate expression results, simplify formulas, and find derivatives.
Why use it?
It lets an agent perform these calculations locally instead of relying on manual arithmetic or an external calculation service.

MCP server for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the calculator-mcp-server plugin — 32 skills, 1 MCP server shipped together

not rated 1repo 19d ago A scan tokens not measured original Apache-2.0

Good fit Use it to calculate expression results, simplify formulas, and find derivatives.

Compare 6 mcp servers from other repositories ↓
Install with agentmods
npx agentmods add mcp/cyanheads/calculator-mcp-server/calculator-mcp-server
View source ↗ cyanheads/calculator-mcp-server npmjs.com
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/cyanheads/calculator-mcp-server

Made for: Claude Code.

Or install calculator-mcp-server, the plugin that ships this one along with the rest of its 32 skills, 1 MCP server.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for calculator-mcp-server

README.md
[![agentmods](https://agentmods.dev/badge/mcp/cyanheads/calculator-mcp-server/calculator-mcp-server/github.svg)](https://agentmods.dev/mcp/cyanheads/calculator-mcp-server/calculator-mcp-server)
Your own site
<a href="https://agentmods.dev/mcp/cyanheads/calculator-mcp-server/calculator-mcp-server"><img src="https://agentmods.dev/badge/mcp/cyanheads/calculator-mcp-server/calculator-mcp-server/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for calculator-mcp-server

Your own site · 80×15
<a href="https://agentmods.dev/mcp/cyanheads/calculator-mcp-server/calculator-mcp-server"><img src="https://agentmods.dev/badge/mcp/cyanheads/calculator-mcp-server/calculator-mcp-server.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

calculator-mcp-server scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

server.json · 15 lines

What it actually says

{
  "calculator-mcp-server": {
    "command": "npx",
    "args": [
      "-y",
      "@cyanheads/calculator-mcp-server"
    ],
    "env": {
      "CALC_MAX_EXPRESSION_LENGTH": "1000",
      "CALC_EVALUATION_TIMEOUT_MS": "5000",
      "CALC_MAX_RESULT_LENGTH": "100000",
      "MCP_LOG_LEVEL": "info"
    }
  }
}
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 10d ago First seen · 15 lines scan A b884d0205ee4

Subscribe to this mod's changes

calculator-mcp-server is an MCP server published in the GitHub repository cyanheads/calculator-mcp-server (1 stars, last pushed 19d ago), licensed Apache-2.0. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Scientificcalculatorllm-toolsmathmathjsmcpmcp-server
Related

Other mcp servers, from other repositories

pubcrawl

PubMed & Europe PMC literature search, US/UK drug labelling, and clinical trials for AI assistants. Runs locally from the @pharmatools/pubcrawl npm package. Needs 1 environment variable to run.

nickjlamb/pubcrawl · not measured

pubchem-mcp-server

Search PubChem compounds, properties, safety data, bioactivity, and cross-references. Runs locally from the @cyanheads/pubchem-mcp-server npm package. Needs 1 environment variable to run.

cyanheads/pubchem-mcp-server · not measured

mathlas

A tool FOR an AI (no API key, no LLM): search existing math over a 3.7M-doc index + airtight numeric/Lean verification + mathlib search (Loogle/LeanSearch) + OEIS/PSLQ identification + needs guarantees scaffolds, served over MCP. Runs locally from the mathlas-mcp Python package. Needs 2 environment variables to run.

Archerkattri/mathlas · not measured

brapi-mcp-server

Collaborative BrAPI v2.1 MCP workspace — studies, germplasm, genotypes across Breedbase, T3, more. Runs locally from the @cyanheads/brapi-mcp-server npm package. Needs 4 environment variables to run.

cyanheads/brapi-mcp-server · not measured

pycodemath

Token-efficient exact math for AI agents: symbolic engine, ODE suite, optimizer and an optimized-code generator (SymPy + NumPy). Runs locally from the pycodemath Python package.

cybersora9/pycodemath · not measured

hea-bench

An open, interpretable calculator of high-entropy-alloy and high-entropy-oxide thermodynamic and geometric descriptors plus the canonical empirical phase-prediction rules. Runs locally from the hea-bench Python package.

dfieser/hea-bench · not measured