The accounting layer for the
AI-native business
You automated your outreach, your code, your content. Your accounting is still the one legacy dashboard you log into on a Sunday. Finn runs your books, and your own AI can query them. Close the last loop.
Real MCP. Claude calling your live books through the accountsos server.
Not a cheaper Xero. A different job.
Incumbents sell you a place to do your bookkeeping. We do the bookkeeping, and make your money legible to the AI you already run everything through.
Your AI can finally see your money
Connect the MCP server and ask Claude or ChatGPT about your runway, VAT, or who owes you, from inside the tools you already work in. No dashboard to open, no CSV to export. The answer comes from your live books.
The accounting runs itself
Forward receipts by email, WhatsApp, Slack or Telegram. Connect your bank. Finn categorises, reconciles, chases invoices, files your VAT to HMRC and closes the month. You get one message when something needs you.
It plugs into your stack, it isn't another silo
Live MCP server, agent-to-agent (A2A) endpoints, a CLI and a public API. Wire Finn into your own agents and automations. Your accounting becomes a tool your systems can call, not a walled dashboard.
Built to be called, not just clicked
Every surface an agent needs is already live. This isn't a roadmap promise.
Connect Claude to your books today. Query balances, VAT, deadlines, invoices.
npm i -g @thriveventurelabs/accountsos. Your books from the terminal, human or agent.
Your agents introduce themselves to Finn and hand off tasks over JSON-RPC.
Read and write against your ledger from your own automations.
Built for the agent era
AI agents read this site more than humans do.
That is not a problem, it is the point. AccountsOS is built AI-native: Finn runs on Claude Sonnet and Gemini, your own AI tools can plug into your books today, and when your business runs on agents, they will talk to Finn directly. You keep the dashboards. The agents get a handshake.
Finn's reasoning. The model accountants already use for advice, running your books.
Reads your receipts, statements and contracts. Vision built in.
Connect Claude to your books now. Ask your own AI about your numbers.
Your agents can talk to Finn directly. The handshake is already wired.
Your records stay in London. AI calls never train the models.
Every number above is live. Nothing an agent does can touch your books without a confirmed, logged action, and the sums are computed, never generated.
Run five companies, touch none of the books
One person, a portfolio of micro-companies, one AI running the accounts across all of them. Multi-entity, 21 countries, one brain you can ask anything. This is how the founder of AccountsOS runs his own ventures, and it's the thing legacy software makes needlessly hard.
This is for you if
- You run a one-person software business, or a lean team, on AI
- You already live in Claude, ChatGPT, Cursor and MCP tools
- Xero and QuickBooks feel like legacy enterprise software to you
- You'd rather ask your books a question than build a report
- You run more than one company and want them all in one brain
Close the last loop
Connect your bank and your AI. Finn does the rest. £20/month, 14 days free, no card.
Start free