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MCP live MCP 2025-06-18 streamable-http

Duck Tax

com.ducktax/ducktax

Check micro-entity company accounts: raw figures in, validated balance sheet and deadlines out.

Watch this dependency Share evidence report
Uptime
100.0%
5 direct probes · 30d
Response
568ms
last probe
Tools
20
callable
Resources
0
readable
Prompts
0
available
Primary URL
https://ducktax.com/api/mcp
Score: 100/100
Handshake verified by our own probe.
pass Answers the MCP handshake 50/50
The handshake and the list calls succeeded on the primary URL.
pass Lists tools, resources or prompts 30/30
20 tools, 0 resources, 0 prompts returned.
pass 3 or more catalogue items 10/10
20 items in total; 3 or more earns these points.
pass Describes itself 10/10
95 characters; more than 30 earns these points.

Tools · 20

check_accounts

Derive a small-company balance sheet (micro-entity, in UK terms) from raw figures and validate it. Returns the derived sheet for the current and prior year, the figures the authority would reject (neg…

dormant_figures

The complete set of figures for a dormant company: share capital, the matching cash, and zeros everywhere else. The register says when the last accounts were filed dormant, and for those companies thi…

totals_to_figures

Turn categorised bank-statement totals into balance sheet figures, applying the rules that stop an import lying: only income categories reach turnover, only expense categories reach operating costs, a…

late_filing_penalty

What missing a Companies House accounts deadline costs. Given the due date, returns days remaining or overdue, the penalty band already incurred, and what the next band costs, the number that makes so…

list_jurisdictions

The countries this server knows about and what it can actually do in each: which have a real accounts engine, which registers can be searched or looked up, the currency, and the identifiers each juris…

sample_accounts

A real worked example: nil turnover, a director loan, a near-empty bank account, the simplest accounts the UK regime permits. Use it to demonstrate check_accounts or as a template for a first-year com…

lookup_company

Look a company up on its public register (Companies House for GB, ABN Lookup for AU) by its registered number. Returns the full public record: name, status, registered office, officers, SIC codes, acc…

search_companies

Find a company by name on its public register and get back its registered number, status and address. This is how you reach lookup_company when the person only knows the name. Free of the daily quota;…

get_prior_year_figures

Read last year's figures out of the company's last filed accounts at Companies House, ready to drop into the *Prior fields of check_accounts or save_filing. Saves typing seven numbers from a PDF and g…

explain_accounts

A plain-English reading of a set of figures, written for a director who is not an accountant: what the derived balance sheet says about the company and anything that needs attention before filing. Onl…

categorise_transactions

Categorise bank-statement transaction descriptions into the fixed vocabulary this product maps to balance sheet lines (sales, software, owner-in, …). Send description strings only, never amounts or da…

check_filing_extension

Whether a company can still apply to its registrar for more time to file, how many days are left to apply, and what being late costs if that window is missed. This is usually the most useful thing to …

draft_extension_reason

Turn a short factual account of what went wrong into the reason text for an application for more time to file accounts, framed in the terms the registrar actually applies. It uses only the facts you g…

list_saved_filings

The user's saved filings, most recently touched first, with every figure in major units. This is the same list the website dashboard shows. Start here when asked about "my accounts" or "my company".

save_filing

Save a set of figures to the user's account, or update a saved one by passing its id from list_saved_filings. Figures in major units. The filing is saved even when validation finds problems, because a…

delete_filing

Delete one saved filing by id, permanently. Confirm with the person before calling this; there is no undo and no trash.

track_company_deadlines

Watch a company by its register number and get reminded before its filing deadlines. Which channels are actually available depends on the server: the reply reports what will really be sent, and it can…

list_tracked_companies

Every company this user gets deadline reminders about, including the ones implied by their saved filings. Shows the next accounts deadline and days remaining where a register record is already cached.…

untrack_company_deadlines

Stop sending deadline reminders about a company. This mutes rather than forgets, which is the only thing that holds: a company implied by a saved filing would otherwise be re-added by the next scan. t…

server_status

What this deployment can actually do right now: which integrations are configured, whether your token is valid, and how much of each daily quota you have left. Call it when a tool refuses and you want…

How to use

Claude Desktop or claude.ai: add a custom connector (Customize → Connectors; on Team and Enterprise plans an owner adds it under Organization settings → Connectors) with this server URL: https://ducktax.com/api/mcp

Cursor or Cline: add to your MCP config:

{
  "mcpServers": {
    "duck_tax": {
      "url": "https://ducktax.com/api/mcp",
      "transport": "streamable-http"
    }
  }
}