AccountsOS MCP Server

Calculate the total cost of hiring someone in a specific country through Deel EOR. Use when the user asks "how much would it cost to hire in [country]?" or about employment costs abroad.

Calculate take-home pay for a given salary in a specific country. Use when the user asks about net pay, take-home salary, or deductions in a country.

Get invoices from the user's Deel account. Shows contractor payment invoices. Use when the user asks about Deel payments, contractor invoices, or payment history.

Get payment receipts from Deel showing payments made to contractors. Use when the user asks about specific Deel payments or needs payment proof.

List people (contractors and employees) in the user's Deel organization. Use when the user asks about their Deel team, workforce, or contractor list.

List contracts from the user's Deel account. Use when the user asks about their Deel contracts, contractors, or team members managed through Deel.

Read a page from this company's private memory wiki — Finn's long-term per-company notes (preferences, decisions, people, recurring Q&A). Call with slug="index" first to list available pages.

Search this company's private memory wiki by keyword. Returns matching page slugs, titles and excerpts.

Save the user's answers about their own business to their AccountsOS company: what kind of business it is (entity_type, for example sole_trader or ltd), the country it is registered in (ISO code such as GB, IE, US), the company or registration number, the name, what it does, the currency, the year-end month and VAT registration. Use it during setup, and when the user corrects one of these details. For a UK or Irish limited company with a registration number, call lookup_company and then link_company instead, which fills everything from the official register. Only pass what the user told you; never guess.

Read the company's VAT liabilities (amounts HMRC says are owed and when they are due) directly from HMRC MTD. Use when the user asks "how much VAT do I owe HMRC", "what's outstanding on my VAT account". Requires HMRC MTD connected.

Read the company's VAT obligations (the returns HMRC expects, with their period keys, start/end dates, due dates, and whether they are Open or Fulfilled) directly from HMRC MTD. Use when the user asks "what does HMRC say I owe a return for", "when is my next VAT return due according to HMRC", or to reconcile our periods against HMRC's record. Requires HMRC MTD connected.

Read the VAT payments HMRC has received on the company's account directly from HMRC MTD. Use when the user asks "has HMRC received my VAT payment", "what VAT have I paid". Requires HMRC MTD connected.

Look up current UK tax rates, thresholds and allowances (income_tax, national_insurance, corporation_tax, dividends, capital_allowances, vat, pensions, mileage, self_assessment, home_office, mtd). Returns the figure plus its source.

List all available verified tax/accounting rule keys for the active company's country (every live country has a library), optionally filtered by category. Use this when you need to find the right key for lookup_tax_rule.

Search UK tax knowledge by keyword when unsure which category/item to look up. Returns matching tax facts across all categories.

Check a UK VAT registration number against HMRC's live Check-a-UK-VAT-number register and return the registered trader name and address. GB only. A "not registered" answer is a real answer from HMRC, not an error. Use this when the user asks whether a VAT number is valid, when adding or editing a supplier or customer with a VAT number, and when a VAT number appears on a document and the user wants it confirmed. Report the registered name back to the user, and point out when it does NOT match the contact's name: a mismatch is the actual thing worth flagging.

List the company's VAT return periods and their status (open, locked, submitted, failed, overdue), with the net VAT due, due date, and HMRC receipt for any submitted ones. Use this FIRST when the user asks about VAT returns, "which quarters are outstanding", "have I filed Q1", or before calculating/locking/submitting — it gives you the period_id you need for the other VAT tools.

Get VAT summary for a calendar quarter, or for any VAT period with start_date and end_date

Aged creditors report: outstanding bills grouped by supplier, bucketed by days past due (current/not-yet-due, 1-30, 31-60, 61-90, 90+). Use when the user asks "who do I owe", "what bills are due", "show aged payables", or is planning supplier payments. Read-only.

Aged debtors report: outstanding invoices grouped by contact, bucketed by days past due (current/not-yet-due, 1-30, 31-60, 61-90, 90+). Use when the user asks "who owes me money", "what's in our debtors book", "show aged receivables", or wants to pick which clients to chase. Read-only.

Get current account balance

Get Balance Sheet report as at a given date.

Add a file the user attached in this chat to their AccountsOS books: a bank statement, a receipt, a supplier bill or a sales invoice. AccountsOS reads it the same way as an emailed document: a bank statement is imported into a bank account (created if it does not exist yet), a receipt or bill is read and matched. Use it whenever the user attaches or mentions a financial document and wants it in their books. The result says what was found and what happened.

Get the documents linked to ONE entity (transaction, invoice, bill, estimate, contact, project, expense claim), or the entities linked to ONE document. Every call needs either document_id, or entity_type together with entity_id: there is no "list all links" call, and a call with neither returns nothing but an error. Look the id up first (get_transactions, get_invoices, search_documents), then call once per id. Use when user asks "what documents are attached to this invoice?" or "show me what's linked to that receipt".

Look up a company on its official register: search by name to find candidates, or fetch a single company by its number to get the full public record. UK companies come from Companies House (registered name, number, status, incorporation date, registered office address, SIC codes, directors/officers, and filing deadlines). Irish companies come from the CRO (registered name, CRO number, status, company type, incorporation date, registered address and the annual return date); a CRO number is digits only. Use this during onboarding to find and confirm the user's company ("is this your company?"). Read-only: it does NOT save anything; use link_company to save the confirmed company. If the result says the lookup is not available, tell the user plainly and take their company details directly with update_company. French companies come from the Annuaire des Entreprises (registered name, SIREN, status, legal form, incorporation date, registered address, activity code and officers); search by name or by SIREN (9 digits). Other countries have no register lookup; ask the user for their company details directly.

Look up a verified tax or accounting rule by its key. The system automatically routes to the active company's own country library: every live country has one (e.g. India: gst-rate-slabs, personal-income-tax-slabs-new-regime), so never tell a user you only know UK rules. Use this for ANY question about specific deadlines, thresholds, notice periods, regulatory dates, or rules where being wrong would mislead the user. UK examples: vat-registration-threshold, ct-filing-deadline, mtd-itsa-mandatory-50k, dividend-allowance-2026-27, mileage-rates-2026-27. UAE examples: ct-rates, ct-filing-deadline, vat-rate, free-zone-qfzp, no-personal-income-tax. Returns the exact answer + an official source URL you MUST cite in your reply, and where the rule has a validity period, the dates it applies between. ALWAYS prefer this over stating a rule from memory. Apply the rule to the user's facts: when the answer turns on a fact only the user knows (when goods were delivered, when work was finished, when money arrived), ask for that fact, never for the conclusion (ask "when did you deliver it?", not "does it belong in Q3 or October?"). Once the user gives the fact, that is the fact: state the result the rule gives for it, with the source, and do not add that you cannot check it or that their accountant should confirm it. Point to an accountant only when the rule itself leaves the question open. For a question about a PAST period, or a FUTURE one (next year's rates where a budget has already set them), pass as_of so you get the rule for that date rather than the current one. If you do not know the exact key, call list_tax_rules first.

Check how 'closed' a month's books are. Returns a close-confidence percentage (share of the month's transactions that are categorised AND reconciled) plus exactly what still needs the founder — uncategorised transactions, categorisations you're unsure about, unreconciled lines, payments missing a receipt, and open VAT. Use when the user asks "is my month done?", "close my books", "what's left for May?", "month-end", or any close/period-end question. Defaults to the last complete month. Surface the returned message; offer to help clear each exception.

Composite read returning everything needed to close a month in one call: P&L for the period, balance-sheet snapshot at period end, VAT summary if registered, unreconciled transaction count, outstanding invoices, and overdue deadlines. Use when the user asks about month-end, "how did we do in [month]", a period close, or wants a one-shot business health view. It saves several round-trips compared to calling each report tool separately.

Read a page from Finn's knowledge base — compiled UK (and US) tax and accounting guidance: rules, cross-references, edge cases, plain-English advice for company directors. Call with page="index" first to list all available pages.

Search Finn's knowledge base by keyword. Returns matching page names and excerpts. Use when unsure which page covers a topic.

Get the status of annual accounts preparation for the current company. Returns the current accounting period, preparation status, and next steps. Use when the user asks about their annual accounts, Companies House filing, year-end accounts, or corporation tax deadline.

Return the proactive, ranked list of everything that currently needs the user's attention across their whole account: missing bank statements, unreconciled transactions, upcoming tax/filing deadlines, a month-end ready to close, annual accounts ready to file, overdue invoices to chase, and open tasks. Use whenever the user asks what they need to do, what's outstanding, what's missing, whether anything needs them, for a status check or 'what should I focus on'. Each item includes a plain-English reason and where to fix it. Proactively offer to help with the most important ones.

List bank accounts connected to the company.

Get supplier bills/invoices owed by the company. Shows what you owe to suppliers.

Budget vs actual: how the company is doing against its budget. Use when the user asks about budget, against budget, over budget, under budget, budget vs actual, budget variance, are we on track, or how a month, quarter or the year compares with the plan. Returns, for each income, cost of sales and expense account, the budget, the actual from the ledger, the variance (actual minus budget) and the variance percent, plus totals and net profit. Income above budget is good, costs below budget are good. hasBudget false means the company has not set a budget: say so and point them to /reports/budget, never present zeros as a result. Budgets are set on the Reports page, Budget vs actual tab. Quote figures from the result only.

Preview the 9-box VAT breakdown for a period WITHOUT locking it. Computes the boxes from the period's transactions using the same logic as the VAT page, so the user can review the figures before locking. Use when the user says "what's my VAT for this quarter", "show me the 9 boxes", or before lock_vat_period so they can check first. Read-only: does not change anything.

Get a tax capital allowance hint for a fixed asset (book depreciation vs tax relief). GB companies get AIA/WDA guidance from official rates; other countries get a jurisdiction note. Use when the user asks about capital allowances, AIA, or tax relief on a specific asset — not a filing computation.

13-week cash-flow forecast. Returns current bank balance, projected weekly inflows/outflows/running balance for the next 13 weeks, projected low point, recurring patterns detected from history, outstanding invoices expected to clear, recurring invoice projections, and tax deadlines that could draw cash. Use when the user asks about cashflow, runway, "can I afford X", "when will I run out", or wants to plan ahead.

List available transaction categories for categorization

List account categories (chart of accounts). Use when the user asks about their chart of accounts, account codes, or available categories for categorizing transactions.

List the companies this AccountsOS account can see (for an accountancy practice, its clients), with the default one marked. Call this first when the user has more than one company, then pass `company` to the other tools.

List contacts (clients, suppliers, leads). Use when user asks about customers, suppliers, or contacts.

Get upcoming tax and filing deadlines. Each carries support (files, prepares, workpaper, reminder_only, or null for a payment) and support_note: what AccountsOS does for it. reminder_only means AccountsOS does not produce the form.

List dividend records. Use when user asks about dividends paid, dividend history, or shareholder payments.

Get the Director's Loan Account (DLA) balance and recent transactions. Shows if director owes company or vice versa, with section 455 tax warnings.

Search uploaded documents (receipts, invoices). Can also list documents by status without a query — status ["pending", "error"] is the Incoming queue. Called with no arguments it lists the newest uploads (up to 25).

Find manual bank accounts that look like the same real-world account as a live bank feed (Revolut Business, Starling, Wise, Mercury, Qonto, Airwallex, Stripe Treasury) already connected — the classic case where a user uploaded statements into a manual account, then later connected the live feed for the same account, leaving duplicate transactions that double-count cash and inflate the P&L. Returns candidate pairs with matched/unmatched transaction counts, date ranges, sample matched pairs, and an AI same-account verdict. Use when the user says their cash or balance looks wrong after connecting a bank, mentions a duplicate account, or asks why a P&L looks inflated. Read-only — use merge_bank_accounts to actually merge a pair.

List active employees for the company. Use when the user asks about their employees, staff, team members, or headcount.

Get estimates/quotes sent to clients.

Get expense claims and reimbursement requests.

List expense claims. Use when the user asks about expenses, expense claims, reimbursements, or receipts they have submitted.

The year-by-year figures from the accounts this company has filed at Companies House, newest first: balance sheet lines (fixed assets, current assets, creditors, net assets, capital and reserves), average employees, turnover and profit after tax where the filing includes a profit and loss, and the movement in reserves against the previous year (profit after tax less dividends). Use when the user asks how last year or an earlier year went, how the business has grown, what was filed, or wants past figures beside the current books. These are the registry's snapshots, not the ledger: say "as filed" and never blend them with live ledger figures. A micro-entity filing has no turnover or profit; say so rather than treating a null as zero.

Get the headline money figures in one call: cash, what the company is owed (open invoices), what it owes (open bills), and net profit this month, the EXACT numbers on the user's Home dashboard. Use for "how am I doing", "how much am I owed", "what do I owe", "what's my position", a quick business health check, or any quick headline-figure question. For how a past month went, use get_profit_and_loss for that month. For invoice/bill line-level detail use get_invoices/get_bills; for ageing use get_aged_debtors/get_aged_creditors.

List fixed assets on the register with cost, net book value, monthly depreciation and status. Use when the user asks about their asset register, depreciation schedules, NBV, or capital items tracked per asset. Filter by active, disposed, or all.

Canada: is my GIFI ready for the T2, which accounts are not mapped or need review, and do the balance checks pass. 'is my GIFI ready', 'GIFI mapping', 'T2 schedule 100 / 125'. Maps any new accounts first. AccountsOS prepares the GIFI trial balance for the accountant's T2 software, it does not prepare or file the T2.

Get active business/financial goals and their progress. Use when user asks about their goals, targets, or how they are tracking against objectives.

Search official GOV.UK tax and business guidance. Use when the user asks "what does HMRC say about X?", asks about tax rules, filing requirements, or wants to know the official guidance on a topic like VAT, corporation tax, dividends, or director responsibilities.

Canada: prepare the GST/HST return (GST34) for a period: 'GST return', 'HST return', 'GST report', 'what do I owe CRA', 'my Q3 GST'. Returns every line (101 to 113C), the balance owing or refund, the due date and any warnings. Defaults to the last completed reporting period. Always use this tool for a Canadian GST/HST figure; never add up a return yourself. AccountsOS prepares the return, it does not file it with CRA.

Currency-split income (or expense) totals in ONE compact call: face totals grouped by each transaction currency (e.g. EUR face vs GBP face) PLUS the company functional-currency total for the same set. Use when the user asks "total income in EUR and in GBP", "how much came in in euros vs pounds", "income by currency", or wants face vs converted figures before an FX check. Do NOT page get_transactions to sum — this returns aggregates only (no transaction dump). Defaults to money-in (income); pass direction "out" for spend. Covers bank lines only: invoices and ledger revenue are NOT included, and a company with no bank account returns nothing here, which is not "no income". For income as the books record it, use get_profit_and_loss.

Read the company's Incoming inbox: messages that arrived by email, WhatsApp, Slack or Telegram (sender, subject, preview, attachments and their processing status), plus a count of documents still processing or failed. Use whenever the user asks what is waiting in Incoming, whether anything came in, about an email or message someone sent, or before saying Incoming is clear. Documents alone are not the whole inbox: a waiting email with a statement attached is a message.

See every integration for this company and user in one call: what's connected (banks, HMRC MTD, Stripe, Deel, Gmail, WhatsApp, Telegram, Slack, Xero and the rest), what's available but not connected, and whether data is actually FLOWING through each connected feed (flowing / quiet / error, last event, 7-day event count, error message). Use when the user asks about connections or channels, when something they need for the task at hand is not connected, or when their data looks stale or missing — a dead feed is often the real cause. To OFFER to set one up, end your message with [[connect: provider_id]] on its own line (use the provider id from this tool's result, e.g. [[connect: slack]] or [[connect: mercury]]): it renders a card. OAuth providers start sign-in; API-key providers (Mercury, Stripe, Wise, Qonto, Airwallex, Starling) collect the key on a masked in-thread field. Offer at most one connection per message. Never ask the user to paste an API key into the chat box — the card collects it, and the key is never returned to you (you only see connected true/false).

Get invoices the user has raised, with summary stats on outstanding and overdue amounts. Use when user asks about invoices, outstanding payments, or money owed to them.

Get General Ledger journal entries. Double-entry accounting records.

Save a UK (Companies House) or Irish (CRO) company from its official register onto the user's AccountsOS company: registered name, number, status, address, directors, year-end and filing deadlines. Call it only after lookup_company found the company and the user confirmed it is theirs. Returns the year-end and the deadlines it set up: tell the user what they are.

List sales pipeline opportunities/deals. Shows prospects, their stage, value, and next actions.

Get detailed information about a specific pipeline opportunity/deal, including notes and activity history.

Get year-to-date payroll figures, last run date, and next payment due. Use when user asks about payroll costs, total salary spend, or when the next payroll run is. For a salary, drawings or "what have I paid myself" question read list_employees (the configured salary), this (whether payroll has run) and get_transactions (what left the bank) together: a configured salary with no payroll runs means nothing was paid through payroll, so say that and show what the bank shows.

Get Profit and Loss (income statement) report for a period.

Get a deal/project's mini P&L: income, costs by category, and net margin, computed from bank transactions linked to it, plus invoice/bill/expense-claim commitment summaries. Use for "how is project X doing", "project profit", "mini P&L for a project", and for the final report when a project completes. Pass project_id if known, or project_name to resolve it by name.

List projects (pipeline, active, completed). Use when the user asks about their projects, deals, or pipeline.

Get the active company's QFZP (Qualifying Free Zone Person) status for UAE Corporate Tax. Returns the qualifying/non-qualifying income split, de minimis status (ok / warning / breach), free zone name, substance declaration state, and per-zone smart hints (e.g. audited accounts requirement, designated zone VAT, trade license expiry). Returns `applicable: false` for UK or UAE mainland companies. Use when the user asks about QFZP status, whether they still qualify, their de minimis headroom, or whether they'll owe 9% CT.

Exchange rates: the closing rate for a currency pair on a date, or a series over a range. Use when the user asks for an exchange rate, FX, a currency conversion, what the euro to dirham or pound to dollar rate is, what a currency move cost us, or whether it is cheaper to buy in one currency or another. With one date it returns that day's closing rate. With a range of 62 days or less it returns the daily closing series and the percentage change. Over 62 days it returns monthly averages (up to 36 months). Read-only, needs no company data. Quote rates from the result only.

Recall what you and the user discussed in PAST conversations (across earlier sessions, including voice and video calls). Call this whenever the user asks "what were we talking about last time?", "remind me what we discussed", "where did we leave off?", "what did we cover yesterday?", or refers back to an earlier chat. Returns recent conversation summaries newest-first — each with a short summary, the key topics, any decisions made, and open action items, plus when it happened. ALWAYS call this before saying you don't remember — you DO have access to past conversations through this tool. (Distinct from read_company_wiki, which is curated durable facts, not the back-and-forth of past chats.)

Reconciliation per bank account: every uploaded statement with its own opening and closing balance as printed, the books' balance at its end date, the difference and whether they agree (month by month), plus the unreconciled transaction count and the newest unreconciled lines. Use it for "does the bank agree?", "what was the closing balance in March?", before quoting any reconciliation difference, when the user asks to check the books against the bank statements, or about reconciliation progress. This tool only reads: to actually reconcile ("reconcile what you can", "match the receipts", "reconcile my bank") call auto_match_receipts, which does the matching. Never say everything is reconciled without a result from this tool, get_attention or auto_match_receipts. Never say you cannot read balances off statements. Each statement row carries period_start, period_end, opening_balance, closing_balance, book_balance_at_end, difference, agrees and document_id. Pass bank_account_id to look at one account. It also gives the link to download the reconciliation report (PDF or Excel), the report to give an accountant who asks for one.

List recurring invoice templates. Use when user asks about recurring invoices, scheduled invoices, or subscription billing.

Find documents that might be related to an entity based on amount, vendor, date, and reference matching. Shows both already-linked documents and AI-suggested matches. Use when user asks "are there any receipts for this transaction?" or "find documents related to this invoice".

List the entries Finn flagged for a second look before they reach a VAT return: suspect or duplicate receipts and invoices, VAT added to a zero-rated purchase, VAT that does not fit the total, personal-looking purchases and amounts out of line with a supplier. Use when the user asks about flagged, suspect, duplicate or odd entries, or when get_attention shows entries needing a second look. Each flag has entity_type, entity_id, label, severity, title and detail.

Each imported bank statement against the books: the statement's period, its opening and closing balance as printed, the book balance on the statement's end date, the difference and whether they agree. Use this to answer 'does the bank agree?', 'what was the closing balance in March?', or before quoting any reconciliation difference. Optional bank_account_id.

Get tasks and to-dos for the company.

Get transactions for the company with optional filters. Returns currency, amount_gbp and exchange_rate. A row with expected_income: true is an uploaded sales invoice still waiting to be paid, NOT money received: leave it out of any cash, income received or bank balance figure. For currency-split income totals prefer get_income_by_currency.

Get Trial Balance showing all account balances.

How this year compares with last year and the years before: are we up or down on last year, revenue and profit trend, margin, cash at year end, year on year, same time last year, how did last year go. Returns the completed years (from the ledger or the filed accounts), the current year to date against the same months last year, and Finn's read of the trend. Use it before any 'how are we doing', planning or forecasting answer when the company has history.