MCP.Market

Calcuris MCP server

by tresor4k·io.github.tresor4k/calcuris-mcp·v0.1.1
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Tax calculators for US, UK, Canada, Australia: income tax, property tax, stamp duty.

A88/100grade A
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Safety scan
A88/100

full report

Adoption
Growing

0 stars97 downloads/wk

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If you have run it, two minutes of your experience saves the next person an afternoon.

Calcuris tools (7)

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

  • au_income_tax

    Computes Australian resident income tax (2025-26 ATO brackets) plus Medicare levy, Medicare levy

  • au_stamp_duty

    Computes Australian state/territory stamp duty on a property purchase, including first-home-buyer

  • ca_income_tax

    Computes Canadian federal + provincial/territorial income tax, CPP/QPP (+ CPP2/QPP2), EI/QPIP, and net

  • uk_dividend_tax

    Computes UK dividend tax using HMRC's stacking method (dividends sit on top of other income), including

  • us_income_tax

    Computes US federal income tax (2026 IRS brackets, post-OBBBA) plus an estimated state income tax,

  • us_paycheck

    Computes US take-home pay per pay period: federal withholding, Social Security, Medicare (+ Additional

  • us_property_tax

    Estimates annual/monthly US property tax from a home value and either a custom rate or a state's real

Public scan report

scanner v0.1.9 · 2026-09-26 · same rubric, same numbers if you re-run it

no findings
  • Code scan19 source files scanned25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitylocal package, no credentials required12/15
  • Maintenancelast push 75 days ago12/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
Overall 88/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Calcuris compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
88/100
higher than 75% of 48,243 servers
Tools
7
the typical server has 7
Tools that change things
0%
typical: 0%. Fewer write tools means less an agent can break
Downloads a week
97
more than 62% of 12,306 servers with a package

What its tools let an agent do: 7 read

Install Calcuris in Claude Code, Cursor or VS Code

Runs npx -y calcuris-mcp on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add calcuris-mcp -- npx -y calcuris-mcp
Add to Cursor

What the publisher says

From the Calcuris repository's README, as published. We do not edit it. Read it on GitHub

calcuris-mcp

An MCP (Model Context Protocol) server that exposes the tax engines behind Calcuris — real 2026 US income tax & paycheck math, US state property tax, Canadian federal + provincial income tax, Australian income tax & stamp duty, and UK dividend tax. No API key, no network calls: every number is computed locally from data sourced from the IRS, Tax Foundation, CRA/Revenu Québec, the ATO and state revenue offices, and HMRC.

Quick Start

Run directly with npx — no install required.

Claude Desktop / Claude Code

Add to your MCP config (claudedesktopconfig.json or .mcp.json):

{
  "mcpServers": {
    "calcuris": {
      "command": "npx",
      "args": ["-y", "calcuris-mcp"]
    }
  }
}

Cursor

Add to .cursor/mcp.json:

{
  "mcpServers": {
    "calcuris": {
      "command": "npx",
      "args": ["-y", "calcuris-mcp"]
    }
  }
}

Tools

Every response includes a source note and a reference_url pointing to the live calculator on calcuris.com that uses the same engine.

Each tool's inputSchema documents every field (types, enums, defaults) and is discoverable via tools/list — see the source in src/index.ts for the full parameter set.

Data sources & freshness

All engines target tax year 2026 (UK: 2026/27, with 2025/26 comparison built in). Rates and brackets are sourced from:

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Calcuris: common questions

Is Calcuris MCP server safe?
Yes, by our scan: it is graded A (88/100). Read the Calcuris safety report
How do I install Calcuris?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Calcuris need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Calcuris maintained?
The last commit was 115 days ago (2026-07-13). The latest release is v0.1.1.
How does Calcuris compare with other MCP servers?
safety score 88/100 (higher than 75% of 48,243 servers); tools 7 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.

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