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Paycheck Calculator

io.github.theluckystrike/paycheck-calculator-mcptheluckystrikestreamable-httpv1.0.0Scanned

Take-home pay for 2025-2026: IRS brackets, FICA wage base and state income tax for 50 states + DC.

5 tools: 1 do something that can't be undone, 3 change things and 1 only read.

Tools: 0 delete, 1 irreversible, 3 write, 1 read.
  • Reads private data · 0
  • Reads text others write · 0
  • Can send data out · 0
  • 4 findings

Anlyon alternative

4 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

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Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

5 tools

Can't be undone 1Claude Code: ask
  • calculate_take_home_payCalculates take-home (net) pay for a US employee in any of the 50 states or DC for tax year 2025 or 2026: federal income tax from the IRS Rev.1 finding

    Why it is in this group

    • The name "calculate_take_home_pay" says "pay": a word that usually means money moves, which cannot be taken back.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "calculate_take_home_pay" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "calculate_take_home_pay" says "pay": a word that usually means money moves, which cannot be taken back.

      What this check looks for
    Description, as the server wrote it
    Calculates take-home (net) pay for a US employee in any of the 50 states or DC for tax year 2025 or 2026: federal income tax from the IRS Rev. Proc. 2024-40 / 2025-32 bracket tables with the One Big Beautiful Bill Act standard deduction ($15,750 single for 2025, $16,100 for 2026), Social Security with the wage base ($176,100 in 2025, $184,500 in 2026), Medicare plus the 0.9% Additional Medicare tax, and state income tax. State tax is exact from each state's 2026 schedule for CA, NY, NJ, IL, PA, GA, NC; other states return a labeled effective-rate estimate (method: "estimate"). Handles pre-tax 401(k) (not FICA-exempt) and payroll HSA (FICA-exempt), and Pennsylvania/New Jersey rules that tax 401(k) or HSA money. Returns per-period and annual figures. Local taxes (NYC etc.) are out of scope. Figures copied from irs.gov and state revenue sites in Oct 2026.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • title: Paycheck calculator: take-home pay
Changes things 3Claude Code: ask
  • compare_states_take_homeRuns the same gross pay through 2 to 10 states (or DC) and ranks them by annual take-home pay for tax year 2025 or 2026, showing state income tax, the method for each state (exact …1 finding

    Why it is in this group

    • The name "compare_states_take_home" says "compare": a word for reading.
    • The description's first verb is "run": a word for a change.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "compare_states_take_home" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "compare_states_take_home" says "compare": a word for reading.

      What this check looks for
    Description, as the server wrote it
    Runs the same gross pay through 2 to 10 states (or DC) and ranks them by annual take-home pay for tax year 2025 or 2026, showing state income tax, the method for each state (exact 2026 schedule for CA, NY, NJ, IL, PA, GA, NC; labeled estimate elsewhere; no wage income tax in AK, FL, NV, NH, SD, TN, TX, WA, WY) and how far each trails the best. Federal tax and FICA use the IRS 2025/2026 tables and wage base. Use it for relocation and remote-work offers.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • title: Compare take-home pay across states
  • hourly_to_salaryConverts an hourly wage to weekly, monthly and annual gross pay, with optional weekly overtime hours at a multiplier (1.5 by default).1 finding

    Why it is in this group

    • The description's first verb is "convert": a word for a change.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "hourly_to_salary" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The description's first verb is "convert": a word for a change.

      What this check looks for
    Description, as the server wrote it
    Converts an hourly wage to weekly, monthly and annual gross pay, with optional weekly overtime hours at a multiplier (1.5 by default). Defaults: 40 hours a week, 52 weeks. Gross pay only; use calculate_take_home_pay for net.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • title: Hourly rate to annual salary
  • salary_to_hourlyConverts an annual salary to an hourly rate and to weekly, biweekly (26), semimonthly (24) and monthly gross pay.1 finding

    Why it is in this group

    • The description's first verb is "convert": a word for a change.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "salary_to_hourly" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The description's first verb is "convert": a word for a change.

      What this check looks for
    Description, as the server wrote it
    Converts an annual salary to an hourly rate and to weekly, biweekly (26), semimonthly (24) and monthly gross pay. Defaults: 40 hours a week, 52 weeks (2,080 hours). Gross pay only; use calculate_take_home_pay for net.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • title: Salary to hourly rate
Only reads 1Show 1 read-only tool
  • get_federal_tax_bracketsReturns the exact federal income tax brackets (rate, lower and upper bound, tax on lower brackets) and standard deduction for tax year 2025 or 2026 and a filing status, from IRS Re…No findings

    Why it is in this group

    • The name "get_federal_tax_brackets" says "get": a word for reading.
    Description, as the server wrote it
    Returns the exact federal income tax brackets (rate, lower and upper bound, tax on lower brackets) and standard deduction for tax year 2025 or 2026 and a filing status, from IRS Rev. Proc. 2024-40 and Rev. Proc. 2025-32, including the One Big Beautiful Bill Act (P.L. 119-21) standard deduction increase for 2025 ($15,750 / $31,500 / $23,625). Also returns the Social Security wage base and Medicare thresholds for that year.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • title: Federal income tax brackets and standard deduction

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or untrusted-input or outbound.

Reads private data0
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write0
Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out0
Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Findings

Matches of fixed checks, with the text they matched.

4 warn
  • Warncalculate_take_home_pay

    The server marks "calculate_take_home_pay" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "calculate_take_home_pay" says "pay": a word that usually means money moves, which cannot be taken back.

    What this check looks for
  • Warncompare_states_take_home

    The server marks "compare_states_take_home" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "compare_states_take_home" says "compare": a word for reading.

    What this check looks for
  • Warnsalary_to_hourly

    The server marks "salary_to_hourly" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The description's first verb is "convert": a word for a change.

    What this check looks for
  • Warnhourly_to_salary

    The server marks "hourly_to_salary" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The description's first verb is "convert": a word for a change.

    What this check looks for

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http paycheck-calculator https://paycheck-calculator-mcp.lipmichal.workers.dev/mcp
claude mcp add --transport http paycheck-calculator https://paycheck-calculator-mcp.lipmichal.workers.dev/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__paycheck-calculator__get_federal_tax_brackets"
    ],
    "ask": [
      "mcp__paycheck-calculator__calculate_take_home_pay",
      "mcp__paycheck-calculator__compare_states_take_home",
      "mcp__paycheck-calculator__salary_to_hourly",
      "mcp__paycheck-calculator__hourly_to_salary"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as paycheck-calculator. Review it before you use it.

Pin

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/io.github.theluckystrike/paycheck-calculator-mcp/verify?hash=4475fdc75e91a1458996a987d76290b276d67a73ad4831d6efe20380bf53e67e" | jq -e '.changed == false'

Pinned hash 4475fdc75e91, from Oct 30, 2026, 01:18 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/io.github.theluckystrike/paycheck-calculator-mcp/changes.xml

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Source: MCP Registry · repository. Synced Oct 30, 2026, 01:17 UTC.