Agent MCP Directory

TapTax: MCP server, CLI and agent surfaces

Yes: TapTax runs a public MCP server at api.taptax.co.uk that listed 49 tools to a client with no credentials on 4 November 2026. Examples: estimate_self_employed_tax, check_tax_code, check_mtd_status. It speaks streamable-http, protocol 2025-11-25. Open servers are readable by any agent; writes still depend on each tool.

Fact sheet

CompanyTapTax
Domaintaptax.co.uk
CategoryPayments & Fintech (assigned by this directory from the registry description)
MCP serverVerified (No authentication)
Ora scorenone: Ora returned no cached score for taptax.co.uk when asked on 5 November 2026
Company found throughthe GitHub MCP Registry
Last verified4 November 2026

MCP server

Endpointhttps://api.taptax.co.uk/mcp
How it was foundlisted in the GitHub MCP Registry
Transportstreamable-http
HTTP status200
Protocol version2025-11-25
Servertaptax 1.1.0
Capabilitiestools, resources
Tools49
Resources2
Prompts0
Connected4 November 2026, 20:04 UTC
Handshake time1,314 ms over 1 attempt

Tools listed

49 tools; the first 40 names are recorded

  • estimate_self_employed_tax
  • check_tax_code
  • check_mtd_status
  • get_mtd_deadlines
  • calculate_take_home_pay
  • calculate_gross_salary_for_take_home
  • calculate_salary_sacrifice
  • calculate_pro_rata_salary
  • convert_hourly_rate_to_salary
  • convert_salary_to_hourly_rate
  • calculate_student_loan_repayment
  • calculate_child_benefit_charge
  • calculate_tax_on_multiple_incomes
  • calculate_pension_tax_relief
  • calculate_dividend_tax
  • compare_salary_and_dividends
  • compare_limited_company_and_sole_trader
  • calculate_corporation_tax
  • calculate_contractor_day_rate
  • compare_inside_and_outside_ir35
  • calculate_cis_deduction
  • plan_quarterly_tax_set_aside
  • calculate_mileage_allowance
  • estimate_self_assessment_penalties
  • calculate_vat
  • check_vat_registration
  • check_vat_reverse_charge
  • calculate_markup
  • calculate_profit_margin
  • calculate_invoice_due_date
  • calculate_late_payment_interest
  • calculate_capital_gains_tax
  • calculate_rental_income_tax
  • calculate_savings_interest_tax
  • calculate_stamp_duty
  • prepare_business_document
  • generate_invoice_numbers
  • get_tax_position
  • list_transactions
  • get_mileage_summary

Connector log

2 connections on 4 November 2026, read-only methods only

  • 19:59:50Z https://api.taptax.co.uk/mcp sent initialize, notifications/initialized, tools/list, resources/list result verified (HTTP 200) 1564 ms
  • 20:04:47Z https://api.taptax.co.uk/mcp sent initialize, notifications/initialized, tools/list, resources/list result verified (HTTP 200) 1314 ms

Authentication

Auth typeNo authentication

The sign-in route, step by step

  1. Send the handshake to https://api.taptax.co.uk/mcp over streamable-http. Servers on the 2026-07-28 revision answer server/discover; older servers answer initialize.
  2. Send tools/list, then resources/list and prompts/list if the capabilities name them.
  3. Send no token. The connector sent none and the server answered, so any MCP client can read this list.
  4. Calling a tool is a separate step this directory never takes.

See OAuth for MCP: client ID metadata documents and dynamic registration for how each route works.

CLI

No CLI is on record for TapTax. The directory checks a package only where a source names one, so this is a floor: a company can ship a command line that no source read for this edition mentions. See shipping a CLI agents can use.

Other agent surfaces

Agent surfaces other than MCP and CLI
SurfaceResult
OpenAPI fileNo OpenAPI file at the root paths checked.
WebMCP in the initial HTMLNot checked: the home page was not read by the shared crawl.
MCP discovery fileNot checked: the domain is not in the shared crawl for this edition.
A2A agent cardNot checked: the domain is not in the shared crawl for this edition.
A2A agent card (older path)Not checked: the domain is not in the shared crawl for this edition.
agents.jsonNot checked: the domain is not in the shared crawl for this edition.
OAuth authorization server metadataNot checked: the domain is not in the shared crawl for this edition.
NLWeb endpointNot checked in this edition.

Registry listings

Registry listings
RegistryListed
Official MCP RegistryNo
GitHub MCP RegistryYes
awesome-remote-mcp-serversNo
SmitheryNot checked: Smithery's listing pages and search API were unavailable on 4 November 2026.
GlamaNot checked: Glama's API needs a key and attribution terms.