# AccountsOS Muse connector

From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta.

## AccountsOS

Query your live accounting books: balances, transactions, VAT, invoices, bills and tax deadlines.

- Record: https://musedirectory.ai/connector/accountsos
- Category: Finance & Bills
- Developer: Thrive Venture Labs (https://accounts-os.com)
- Muse status: Extra setup. Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
- Health: Working, 167ms, checked 2026-10-30T03:56:03Z
- Endpoint: https://accounts-os.com/api/mcp/plugin
- Auth: No account needed; Pricing: unknown
- Screening: Screened, no issues found (2026-10-30T03:56:03Z)
- Source: Found in the official MCP Registry (io.github.paulgosnell/accountsos-mcp) https://registry.modelcontextprotocol.io/v0/servers?search=io.github.paulgosnell%2Faccountsos-mcp

Connects to AccountsOS accounting software to let you check company balances, transactions, VAT summaries, invoices owed to you, bills you owe, tax deadlines, profit and loss, and upload receipts and bank statements. Supports UK, Irish and Canadian businesses.

Example request: "Show me my current cash balance and how much my clients owe me."

How to connect: Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use AccountsOS to help me. It is a free service with an MCP server at https://accounts-os.com/api/mcp/plugin. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.

Tools:
- list_companies: 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.
- update_company: 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 
- link_company: 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 t
- add_document: 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 re
- get_transactions: 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. Fo
- get_balance: Get current account balance
- get_deadlines: 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.
- get_vat_summary: Get VAT summary for a calendar quarter, or for any VAT period with start_date and end_date
- search_documents: 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).
- read_wiki: 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_wiki: Search Finn's knowledge base by keyword. Returns matching page names and excerpts. Use when unsure which page covers a topic.
- read_company_wiki: 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_company_wiki: Search this company's private memory wiki by keyword. Returns matching page slugs, titles and excerpts.
- get_tax_facts: 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.
- search_tax_facts: Search UK tax knowledge by keyword when unsure which category/item to look up. Returns matching tax facts across all categories.
- list_categories: List available transaction categories for categorization
- get_dla_balance: Get the Director's Loan Account (DLA) balance and recent transactions. Shows if director owes company or vice versa, with section 455 tax warnings.
- get_invoices: 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_contacts: List contacts (clients, suppliers, leads). Use when user asks about customers, suppliers, or contacts.
- get_bills: Get supplier bills/invoices owed by the company. Shows what you owe to suppliers.
- get_estimates: Get estimates/quotes sent to clients.
- get_profit_and_loss: Get Profit and Loss (income statement) report for a period.
- get_balance_sheet: Get Balance Sheet report as at a given date.
- get_trial_balance: Get Trial Balance showing all account balances.
- get_tasks: Get tasks and to-dos for the company.
- get_expense_claims: Get expense claims and reimbursement requests.
- get_bank_accounts: List bank accounts connected to the company.
- get_journal_entries: Get General Ledger journal entries. Double-entry accounting records.
- list_opportunities: List sales pipeline opportunities/deals. Shows prospects, their stage, value, and next actions.
- get_opportunity: Get detailed information about a specific pipeline opportunity/deal, including notes and activity history.
- get_income_by_currency: 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 e
- get_financial_snapshot: 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",
- get_integration_status: 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 / quie
- get_gst_hst_return: 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. Alwa
- get_gifi_status: 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
- get_vat_periods: 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
- get_hmrc_vat_obligations: 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 accord
- get_hmrc_vat_liabilities: 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.
- get_hmrc_vat_payments: 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.
- check_vat_number: 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 ad

Screening checks:
- MCP handshake: pass (Answered in 167ms)
- Domain against threat feeds (Cloudflare security DNS): pass (accounts-os.com not flagged)
- Published packages against the OSV malicious-package database: pass (No malicious-package advisories)
- Hidden instructions or invisible characters in tool text: pass (82 tools read, nothing found)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (Domain registered 312 days ago)
- AI review of purpose and tool behavior: pass (No concerns)