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TapTax MCP Server

TapTax MCP Server

by udohsolomon
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Remote

TapTax MCP server

TapTax is Making Tax Digital (MTD) software for UK sole traders and landlords. This repository holds the public connection details for the TapTax MCP server, plus ready-made plugins for Claude Code and Cursor. The server itself is hosted by TapTax; there is nothing to install or run.

Ask in plain English: how much tax you owe so far this year, which transactions still need reviewing, log this receipt, invoice a client, or get your quarterly update ready. The 37 public tools work with no account: the tax estimate, PAYE tax code checker, MTD eligibility and deadlines, and every calculator at taptax.co.uk/tax-calculator.

Connect

Claude

Add TapTax from the Claude connector directory, or add a custom connector with the server URL above.

Claude Code

Install the plugin from this repository:

/plugin marketplace add udohsolomon/taptax-mcp
/plugin install taptax@taptax

Or add just the server:

claude mcp add --transport http taptax https://api.taptax.co.uk/mcp

Then run /mcp, choose taptax and Authenticate to use your own records.

Cursor

Install the TapTax plugin from the Cursor Marketplace, or add the server to ~/.cursor/mcp.json:

{
  "mcpServers": {
    "taptax": { "url": "https://api.taptax.co.uk/mcp" }
  }
}

VS Code

code --add-mcp '{"name":"taptax","type":"http","url":"https://api.taptax.co.uk/mcp"}'

Any other MCP client

Point it at https://api.taptax.co.uk/mcp over Streamable HTTP. The account tools answer an unauthenticated call with HTTP 401 and a WWW-Authenticate header naming the protected resource metadata, so clients that support MCP authorization start the sign-in themselves.

Related MCP server: zCloak Xero Accounting MCP

Tools

Public (no account)

Tool

What it does

estimate_self_employed_tax

Estimate self-employed tax

check_tax_code

Check a PAYE tax code

check_mtd_status

Check if Making Tax Digital applies

get_mtd_deadlines

Making Tax Digital deadlines

calculate_take_home_pay

Calculate take-home pay

calculate_gross_salary_for_take_home

Work out the salary for a take-home figure

calculate_salary_sacrifice

Calculate salary sacrifice savings

calculate_pro_rata_salary

Calculate a pro rata salary

convert_hourly_rate_to_salary

Convert an hourly rate to a salary

convert_salary_to_hourly_rate

Convert a salary to an hourly rate

calculate_student_loan_repayment

Calculate student loan repayments

calculate_child_benefit_charge

Calculate the High Income Child Benefit Charge

calculate_tax_on_multiple_incomes

Calculate tax on several incomes

calculate_pension_tax_relief

Calculate pension tax relief

calculate_dividend_tax

Calculate dividend tax

compare_salary_and_dividends

Compare salary and dividends

compare_limited_company_and_sole_trader

Compare a limited company and sole trader

calculate_corporation_tax

Calculate corporation tax

calculate_contractor_day_rate

Calculate contractor day rate income

compare_inside_and_outside_ir35

Compare inside and outside IR35

calculate_cis_deduction

Calculate a CIS deduction

plan_quarterly_tax_set_aside

Plan how much tax to set aside

calculate_mileage_allowance

Calculate the mileage allowance

estimate_self_assessment_penalties

Estimate Self Assessment penalties

calculate_vat

Add or remove VAT

check_vat_registration

Check VAT registration and the Flat Rate Scheme

check_vat_reverse_charge

Check the construction VAT reverse charge

calculate_markup

Calculate a price from a markup

calculate_profit_margin

Calculate a profit margin

calculate_invoice_due_date

Calculate an invoice due date

calculate_late_payment_interest

Calculate late payment interest on an invoice

calculate_capital_gains_tax

Calculate Capital Gains Tax

calculate_rental_income_tax

Calculate tax on rental income

calculate_savings_interest_tax

Calculate tax on savings interest

calculate_stamp_duty

Calculate Stamp Duty

prepare_business_document

Prepare an invoice, quote or receipt to download

generate_invoice_numbers

Generate invoice numbers

Your TapTax account

Tool

What it does

Access

get_tax_position

Get my tax position

read

list_transactions

List my transactions

read

get_mileage_summary

Get my mileage

read

add_transaction

Add income or an expense

read and change

update_transaction

Update or review a transaction

read and change

log_mileage_trip

Log a business trip

read and change

list_invoices

List my invoices

read

create_invoice

Create an invoice

read and change

send_invoice

Show an invoice ready to send

read and change

mark_invoice_paid

Mark an invoice paid

read and change

prepare_quarterly_update

Prepare my quarterly update

read

You sign in on taptax.co.uk and choose read-only or read-and-change access, and you can disconnect at any time in TapTax Settings > Connected apps.

What TapTax never does from a chat

  • File to HMRC. HMRC's fraud-prevention rules need details of the device you file from, so prepare_quarterly_update shows the figures with a button that opens TapTax on the right period, and the last tap is yours.

  • Email an invoice by itself. send_invoice shows the invoice in a card, and it is emailed only when you press Send on that card.

  • Move money or reveal bank or HMRC logins.

Estimates are not tax advice.

What is in this repository

Path

Purpose

server.json

The Official MCP Registry entry

.claude-plugin/

Claude Code plugin manifest and marketplace

.cursor-plugin/

Cursor plugin manifest and marketplace

.mcp.json, mcp.json

The remote server for Claude Code and Cursor

skills/taptax/SKILL.md

Guidance the assistant loads with the plugin

glama.json

Glama ownership claim

Support and privacy

TapTax is a trading name of HomePortfolio HQ Ltd.

This server cannot be deployed

One endpoint for every MCP toolRayrun runs every MCP server behind one URL and holds the credentials. Each call is decided per client, tool, and argument, then recorded.ray.runAd

Maintenance

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