TapTax is Making Tax Digital software for UK sole traders and landlords. Ask in plain English: how much tax you owe so far this year, which transactions still need reviewing, log a receipt, invoice a client, or get your quarterly HMRC update ready. **37 tools work with no account:** the self-employed tax estimate, PAYE tax code checker, MTD eligibility and deadlines, and every calculator at taptax.co.uk/tax-calculator (take-home pay, salary vs dividends, corporation tax, IR35, Capital Gains Tax, Stamp Duty, rental income, VAT, CIS, mileage, penalties and more), plus invoice, quote and receipt generators. **11 tools act on your own TapTax account** once you sign in with OAuth and choose read-only or read-and-change access: your tax position, transactions and the review queue, mileage, invoices, and the quarterly update. Filing to HMRC always stays one tap in TapTax: the quarterly update tool shows the figures with a button that opens TapTax on the right period. Invoices are emailed only when you press Send on the invoice card. Estimates are not tax advice.

MCP readiness

B · 88/100

Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here C+, 71.3/100), which weighs availability, conformance, p95 speed and descriptor. How the two differ

Valid MCP handshake	10/10	initialize and tools/list both answered.
Live MCP endpoint	25/25	Endpoint answers the MCP initialize handshake (1915 ms).
Protocol revision	8/10	Speaks MCP 2025-11-25, 1 revision(s) behind 2026-07-28.
Signed descriptor	n/a	No MCP standard defines a signed server descriptor.
Uptime (30 days)	15/15	30/30 probes succeeded over 30 days (100%).
Tool declaration	10/10	Lists 49 tool(s) with descriptions.
Verified identity	5/10	Publisher declared (repository, package or homepage); claim this listing to verify domain control.
Freshness + modern flags	4/5	seen in a source within 7 days.
Auth declaration	2/5	Declares credential scheme: smithery_api_key.

Applicable criteria total 90 points, scaled to 100.

Responsiveness: Responsive (1915 ms; bands ≤2.5 s, ≤5 s, ≤8 s, slower; penalty only).

Measured 2026-11-11.

Nine criteria, the same as the A2A readiness score, read from our daily MCP probe (initialize + tools/list) and 30-day probe history. No MCP standard defines a signed server descriptor, so that criterion is n/a and the other 90 points are scaled to 100. Grades: A>=90, B>=75, C>=60, D>=40, F<40. Display only: search order uses the quality grade.

Compared with peers

Against 53,039 reachable MCP servers in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.

Readiness: Higher than 95% of peers; This listing 88 · peer median 81
Latency: Faster than 46% of peers; This listing 358 ms · peer median 326 ms

Where it loses the most points, and how to win them back

Verified identity −5 — Claim the listing and prove control of its domain.
Now: Publisher declared (repository, package or homepage); claim this listing to verify domain control.
Auth declaration −3 — State how to authenticate (an auth scheme, or that none is needed).
Now: Declares credential scheme: smithery_api_key.
Protocol revision −2 — Support the current protocol revision.
Now: Speaks MCP 2025-11-25, 1 revision(s) behind 2026-07-28.

How many agent tools actually work · All statistics

Listed in

Directories this entry was found in.

smithery since 2026-10-10 ↗

How to connect

MCP endpoint (streamable-http)

https://server.smithery.ai/taptax/taptax/mcp

JSON-RPC initialize probe

curl -X POST https://server.smithery.ai/taptax/taptax/mcp \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{}}'

Homepage

https://taptax.co.uk/integrations/claude

Listed at (smithery)

https://taptax.co.uk/integrations/claude