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Car Loan Interest Deduction Calculator

io.github.theluckystrike/car-loan-interest-deduction-calculator-mcptheluckystrikestreamable-httpv1.0.0Scanned

2025-2028 car loan interest deduction, SALT cap, child tax credit and 2026 tax brackets (IRS).

4 tools: 3 change things and 1 only read.

Tools: 0 delete, 0 irreversible, 3 write, 1 read.
  • Reads private data · 0
  • Reads text others write · 0
  • Can send data out · 0
  • No findings

Anlyon alternative

3 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.

4 tools

Changes things 3Claude Code: ask
  • calculate_car_loan_interest_deductionCalculates the 2025-2028 federal deduction for car loan interest created by the One Big Beautiful Bill Act (P.L.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Calculates the 2025-2028 federal deduction for car loan interest created by the One Big Beautiful Bill Act (P.L. 119-21, IRC 163(h)(4)) the way IRS Schedule 1-A Part IV does: up to $10,000 of qualified passenger vehicle loan interest, then $200 off for each $1,000 or part of $1,000 of MAGI over $100,000 ($200,000 married filing jointly), so it reaches $0 at $149,001 ($249,001 joint). Checks the eligibility tests: loan originated after Dec 31 2024, new vehicle, final assembly in the US, personal use, car/minivan/van/SUV/pickup/motorcycle under 14,000 lb GVWR, first lien, not a lease. Available whether or not you itemize. Rules copied from the 2025 Schedule 1-A, Form 1040 instructions and IRS Notice 2025-57.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • title: Car loan interest deduction (2025-2028)
  • calculate_child_tax_creditCalculates the child tax credit as Schedule 8812 does after the One Big Beautiful Bill Act: $2,200 per qualifying child under 17 for 2025 and 2026, $500 per other dependent, reduce…No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Calculates the child tax credit as Schedule 8812 does after the One Big Beautiful Bill Act: $2,200 per qualifying child under 17 for 2025 and 2026, $500 per other dependent, reduced by 5% of MAGI over $400,000 joint / $200,000 others (excess rounded up to the next $1,000), limited by tax liability, with the refundable additional child tax credit of up to $1,700 per child at 15% of earned income over $2,500. Amounts from the 2025 Schedule 8812 and Rev. Proc. 2025-32.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • title: Child tax credit (2025-2026)
  • calculate_salt_deductionCalculates the deductible state and local tax (SALT) on Schedule A under the One Big Beautiful Bill Act cap (IRC 164(b)(6)-(7)): $40,000 for 2025 and $40,400 for 2026 ($20,000 / $2…No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Calculates the deductible state and local tax (SALT) on Schedule A under the One Big Beautiful Bill Act cap (IRC 164(b)(6)-(7)): $40,000 for 2025 and $40,400 for 2026 ($20,000 / $20,200 married filing separately), rising 1% a year through 2029, reduced by 30% of MAGI over $500,000 (2025) or $505,000 (2026) but never below $10,000, then back to a flat $10,000 in 2030. Uses the IRS State and Local Tax Deduction Worksheet. Optionally compares itemizing with the standard deduction. Amounts copied from the 2025 Schedule A instructions, the 2026 draft Schedule A and the statute.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • title: SALT deduction cap (2025-2030)
Only reads 1Show 1 read-only tool
  • get_tax_brackets_and_standard_deductionReturns the official 2025 and 2026 federal income tax brackets and standard deductions after the One Big Beautiful Bill Act: 2026 standard deduction $16,100 single, $32,200 joint, …No findings

    Why it is in this group

    • The name "get_tax_brackets_and_standard_deduction" says "get": a word for reading.
    Description, as the server wrote it
    Returns the official 2025 and 2026 federal income tax brackets and standard deductions after the One Big Beautiful Bill Act: 2026 standard deduction $16,100 single, $32,200 joint, $24,150 head of household (Rev. Proc. 2025-32), 2025 $15,750 / $31,500 / $23,625, plus the additional amount for age 65 or blind. Optionally computes the tax and marginal rate on a taxable income. Says plainly that 2027 amounts are not yet published (checked against the Internal Revenue Bulletin and irs-drop on 2026-11-02).

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • title: 2025 and 2026 federal 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.

No check matched anything in these tool definitions. That is not a safety guarantee.

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 car-loan-interest-deduction-calculator https://car-loan-interest-deduction-calculator-mcp.lipmichal.workers.dev/mcp
claude mcp add --transport http car-loan-interest-deduction-calculator https://car-loan-interest-deduction-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__car-loan-interest-deduction-calculator__get_tax_brackets_and_standard_deduction"
    ],
    "ask": [
      "mcp__car-loan-interest-deduction-calculator__calculate_car_loan_interest_deduction",
      "mcp__car-loan-interest-deduction-calculator__calculate_salt_deduction",
      "mcp__car-loan-interest-deduction-calculator__calculate_child_tax_credit"
    ],
    "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 car-loan-interest-deduction-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/car-loan-interest-deduction-calculator-mcp/verify?hash=d49950da7615d8e6e422cf11c031dd50f1557be401f9f0048f0c0899c9bc7afd" | jq -e '.changed == false'

Pinned hash d49950da7615, from Nov 2, 2026, 03:18 UTC.

Watch

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

https://anlyon.dev/servers/io.github.theluckystrike/car-loan-interest-deduction-calculator-mcp/changes.xml

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Source: MCP Registry · repository. Synced Nov 2, 2026, 03:18 UTC.