TapTax vs Billingengine MCP
A side-by-side look at the TapTax and Billingengine MCP MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
T
TapTaxFinance & FintechUK tax: take-home pay, self-employed and company tax, VAT, stamp duty, invoices and MTD.52GoodAuth: not declaredVerdict: choose TapTax for finance & fintech work; choose Billingengine MCP for finance & fintech as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
TChoose TapTax when
- You need dedicated capabilities in the Finance & Fintech domain.
- You want tools like
estimate_self_employed_tax, check_tax_code, check_mtd_status.
Choose Billingengine MCP when
- You need dedicated capabilities in the Finance & Fintech domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: API key required.
- You have the keys it needs:
BILLINGENGINE_API_KEY. - You want tools like
find_customers, create_customer, update_customer.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | T TapTax | |
|---|---|---|
| Category | Finance & Fintech | Finance & Fintech |
| Quality signal | 52/100 · Good | 78/100 · Great |
| Install command | Not confirmed yet | Confirmed |
| Transport | — | Local subprocess (stdio) |
| Auth | Not declared | API key required |
| Pricing | Free | Paid service |
| Required env vars | None listed | BILLINGENGINE_API_KEY |
Tools & capabilities
TapTax tools 49
estimate_self_employed_taxEstimate UK income tax and Class 4 National Insurance for a sole trader from turnover and allowable expenses, with the take-home figure, effective and marginal rates, payments on account and tailored tips, from HMRC's published rates for the tax year. Works from the figures given, without a TapTax account.check_tax_codeCheck whether a UK PAYE tax code (e.g. 1257L, BR, K475, 1257L W1/M1) looks right for a salary and circumstances, explain what it means, and estimate any over- or under-payment. Flat-rate codes (BR, D0, D1) are only judged when hasMultipleJobs is known; without it the verdict is needs_info. Returns a verdict tier; refund figures are estimates, not amounts owed.check_mtd_statusSay whether and when Making Tax Digital for Income Tax applies to someone, from their qualifying income: self-employment turnover plus property income, before expenses, as on their Self Assessment return. Employment and pension income do not count.get_mtd_deadlinesList the standard Making Tax Digital quarterly update periods and deadlines for a tax year, and which one is next. Updates are cumulative from 6 April.calculate_take_home_payCalculate take-home pay from a UK salary for a tax year: income tax by band (England, Wales and Northern Ireland, or Scotland), employee National Insurance, student loan repayment and pension contributions, with yearly, monthly and weekly take-home and the employer National Insurance and total cost to the employer.calculate_gross_salary_for_take_homeWork out the gross UK salary needed to take home a given amount a year after income tax, employee National Insurance, student loan and a pension percentage, for a tax year (net to gross).calculate_salary_sacrificeCompare pay before and after a salary sacrifice for a pension or an electric company car: income tax, National Insurance and student loan saved, employer National Insurance saved and passed back, benefit-in-kind tax for a car, the drop in take-home pay, and for a pension the cost per pound added and the saving against paying in from net pay.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
TapTax
No confirmed install command for TapTax yet — follow the setup steps linked from its listing page rather than a guessed package name.
Billingengine MCP
{
"mcpServers": {
"billingengine-mcp": {
"command": "npx",
"args": [
"-y",
"billingengine-mcp"
],
"env": {
"BILLINGENGINE_API_KEY": "YOUR_BILLINGENGINE_API_KEY_HERE"
}
}
}
}
Frequently asked questions
TapTax is categorized under Finance & Fintech and uses an install path we have not confirmed yet. Billingengine MCP belongs to Finance & Fintech and uses a local stdio subprocess. Pick TapTax for finance & fintech work and Billingengine MCP for finance & fintech.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client. TapTax has no confirmed install command yet — follow its own setup instructions.
TapTax is listed as free. Billingengine MCP is listed as a paid service. Auth: api key required. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add taptax and billingengine-mcp as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, TapTax has a quality signal of 52/100 (Good) with 0 views, 0 installs and 0 GitHub stars. Billingengine MCP has 78/100 (Great) with 3 views, 0 installs and 0 GitHub stars.