UK Income Tax and Salary
io.github.theluckystrike/uk-income-tax-salary-mcptheluckystrikestreamable-httpv1.0.0Scanned
UK income tax and take-home pay 2025/26 and 2026/27: Scottish bands, NI, student loans, 60% trap.
4 tools: 1 change things and 3 only read.
- Reads private data · 1
- Reads text others write · 0
- Can send data out · 0
- No findings
Anlyon alternative
1 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.
Import an OpenAPI spec →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 1Claude Code: ask
calculate_uk_take_homeCalculates UK take-home pay for an employee in tax year 2025/26 or 2026/27 from HMRC's published rates: income tax by band (England, Wales and NI, or the six Scottish bands incl.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 UK take-home pay for an employee in tax year 2025/26 or 2026/27 from HMRC's published rates: income tax by band (England, Wales and NI, or the six Scottish bands incl. the 2026/27 Scottish starter and basic bands), employee Class 1 National Insurance (8% / 2%), student loan repayments (Plan 1, 2, 4, 5 and Postgraduate, with 2026/27 thresholds), and pension by salary sacrifice or relief at source. Applies the Personal Allowance taper above £100,000 (£1 per £2, the 60% trap) and reads tax codes such as 1257L, S1257L, K475, BR and D0. Returns net pay a year, a month and a week. Figures copied from gov.uk and HMRC in Oct 2026.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
- title: UK take-home pay
Only reads 3Show 3 read-only tools
compare_salariesCompares 1 to 5 UK gross salaries after income tax, National Insurance, student loan and pension for 2025/26 or 2026/27, with the same region, tax code and options for each.No findings
Why it is in this group
- The name "compare_salaries" says "compare": a word for reading.
Description, as the server wrote it Compares 1 to 5 UK gross salaries after income tax, National Insurance, student loan and pension for 2025/26 or 2026/27, with the same region, tax code and options for each. Shows net pay a year, month and week, effective and marginal rates, and how much of each pay rise you keep compared with the first salary. Shows when a rise lands in the £100,000 to £125,140 Personal Allowance taper (60% in England, 69.5% in Scotland in 2026/27 with NI). Uses HMRC 2025/26 and 2026/27 rates fetched in Oct 2026.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
- title: Compare UK salaries after tax
get_uk_tax_bandsReturns the official UK income tax bands for 2025/26 or 2026/27, for England, Wales and Northern Ireland or for Scotland (starter 19%, basic 20%, intermediate 21%, higher 42%, adva…Reads private dataNo findings
Why it is in this group
- The name "get_uk_tax_bands" says "get": a word for reading.
What it can reach
- private-dataThe description's first sentence says "return" and "table": it reads databases.
Description, as the server wrote it Returns the official UK income tax bands for 2025/26 or 2026/27, for England, Wales and Northern Ireland or for Scotland (starter 19%, basic 20%, intermediate 21%, higher 42%, advanced 45%, top 48%), both as taxable-income bands from HMRC's employer tables and as gross-salary bands with the standard £12,570 allowance. Also returns the £100,000 allowance taper, Class 1 NI thresholds and employee rates by category letter, and student loan thresholds for each plan. A figure that is not published is marked unannounced, never guessed. Copied from gov.uk and HMRC in Oct 2026.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
- title: UK income tax bands and thresholds
marginal_rate_at_incomeReturns the true UK marginal rate on the next pounds of salary in 2025/26 or 2026/27: income tax band rate, employee NI and student loan together, plus the Personal Allowance taper…No findings
Why it is in this group
- The description's first verb is "return": a word for reading.
Description, as the server wrote it Returns the true UK marginal rate on the next pounds of salary in 2025/26 or 2026/27: income tax band rate, employee NI and student loan together, plus the Personal Allowance taper between £100,000 and £125,140 that makes it 60% plus NI in England, Wales and NI and 67.5% plus NI in Scotland's advanced band. Handles salary sacrifice, relief at source, Scottish bands and tax codes. Measured as the change in deductions over the next `step` pounds (default £100). Rates from gov.uk and HMRC, fetched Oct 2026.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
- title: UK marginal tax rate at a salary
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 untrusted-input or outbound.
- Reads private data1
- 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.
Install
Pinned to version 1.0.0. Values in angle brackets are yours to fill in.
claude mcp add --transport http uk-income-tax-salary https://uk-income-tax-salary-mcp.lipmichal.workers.dev/mcpclaude mcp add --transport http uk-income-tax-salary https://uk-income-tax-salary-mcp.lipmichal.workers.dev/mcpRun 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.
{
"permissions": {
"allow": [
"mcp__uk-income-tax-salary__get_uk_tax_bands",
"mcp__uk-income-tax-salary__compare_salaries",
"mcp__uk-income-tax-salary__marginal_rate_at_income"
],
"ask": [
"mcp__uk-income-tax-salary__calculate_uk_take_home"
],
"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 uk-income-tax-salary. Review it before you use it.
Capability tags behind 1 rule
- mcp__uk-income-tax-salary__get_uk_tax_bands private-data
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/uk-income-tax-salary-mcp/verify?hash=aaf12c2b2755ac1c41e7721b190327553c52ccf91b85ef4cea8cafd3ba5e7e21" | jq -e '.changed == false'Pinned hash aaf12c2b2755, 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/uk-income-tax-salary-mcp/changes.xmlAn Atom feed. Works in any feed reader or Slack's RSS app.
Badge
[](https://anlyon.dev/servers/io.github.theluckystrike/uk-income-tax-salary-mcp)Source: MCP Registry · repository. Synced Oct 30, 2026, 01:17 UTC.