For individuals, businesses and accounting professionals
Add OpenAccountants to the AI you already use.
No account needed — pick the AI you use, paste one URL, and ask your tax questions with source-cited Tax Guides in context. Every Guide shows its jurisdiction, tax year, sources and review status.
Install
Wire it into your AI in about two minutes
Pick the AI you use and add OpenAccountants below. No account needed — most people are done in about two minutes.
- 1Open Claude.ai Connectors (button above) — or Settings → Customize → Connectors.
- 2Click + → Add custom connector. Name it OpenAccountants and paste the URL below.
- 3Click Add → Allow tools when prompted. On first use, sign in with your OpenAccountants account.
https://www.openaccountants.com/api/mcpTry it — your first prompt
Start by naming the connector, so your AI knows exactly what to use. Paste this: “Using the Open Accountants connector, please tell me how you can help me with my taxes.”
No account needed to add it. Create a free account to save your setup, keep track of the Guides you use, and get an email when accountants review new jurisdictions.
On a phone, or not ready to install? Email me the setup guide
A desktop AI app is needed to add OpenAccountants — it can't be set up from a phone browser. Leave your email and we'll send the setup guide, plus the occasional update as accountants review new jurisdictions. No spam.
Who it's for
I have a tax question
Understand the likely rules, see the sources and organise the facts an accountant may need.
I work in accounting
Load maintained Tax Guides, research unfamiliar matters and prepare draft working papers for your review.
I am building an agent
Use the server's discovery, retrieval and tools programmatically.
“Prep the 2025 return for my client: freelance dev in California, $142k Stripe revenue, single-member LLC, home office.”
Your AI guesses Schedule C, SE tax, QBI, and state forms from training data. No current source retrieval, no citations, thresholds drift year to year.
“Prep the 2025 return for my client: freelance dev in California, $142k Stripe revenue, single-member LLC, home office.”
Loads the relevant California Tax Guides, shows its working with figures cited to source, flags edge cases, and delivers a draft review-ready working paper with statute citations — for a professional to review.
Watch it run
One prompt. Open Tax Guides. Review-ready draft out.
Describe the facts once. Your AI loads the relevant Tax Guides, shows its working with every figure cited to its source, and produces a draft working paper. Any output remains a draft unless a qualified professional separately reviews your specific facts.
Someone's AI session
- TaxpayerI rent out an apartment in Malta and made about €14,000 last year. How much tax do I owe, and how do I declare it?
- AI agentChecking the Malta rental income Tax Guide via OpenAccountants — accountant-reviewed. Two routes: a 15% final tax on gross rent, or normal progressive rates after allowable expenses. On €14,000 gross, the flat route is roughly €2,100, declared on Form TA24 by 30 April.
- TaxpayerWhich one is better for me?
- AI agentThat depends on details I shouldn't assume — your other income, your real expenses. An accounting professional reviewed this Malta Guide. Want me to package your working and let you request a professional review before you file?
You reviewed the Malta rental Guide in this answer. Cettina Vella · CPA (Malta)
Request reviewTheir working paper and assumptions arrive with the request. You choose whether to take it — no fee to receive it.
Illustrative concept using real accountant-reviewed Malta Guides — not a customer record, not tax advice.
What arrives with the request
Working paper · TY 2025
MT · Rental- Gross rent
- €14,000
- 15% final tax (TA24)
- €2,100
- Progressive route
- needs your figures
- Form
- TA24
- Due
- 30 Apr
Illustrative example only — not a customer record, not tax advice, not filing-ready. Every material figure traces back to the relevant Guide and primary source it came from (e.g. Income Tax Act, Art. 31D).
You review and sign
You check the facts, the law, and the final forms before anything is filed. The professional signs off, never the AI.
Your accepted full-Guide review carries a public record with your name, credentials, review date and applicable period. It does not by itself create a client engagement or mean you reviewed a specific taxpayer's return.
Where it saves you time
Three moments in a busy practice
This is not a chatbot upgrade. It is source-cited Tax Guides, cited output — each showing its review status — wired into the AI you already use for client work.
Client intake
Describe messy facts once. Your AI agent loads the right jurisdiction Guides instead of you pasting statute excerpts into every session.
Unfamiliar jurisdictions
Cross-border or new-country questions without opening five government sites. Compare rules and plan positions in one session.
Review before you act
Every figure should trace to the Guide and source it used, with its review status. You review the draft working paper and determine what professional steps are required.
What the connector unlocks · Developer reference
Four tools your AI agent can call
Install once. Your AI agent pulls open, source-cited Tax Guides, runs workflows, and returns cited output with its review status — instead of improvising from training data.
Source-cited Tax Guides
Search and load published Tax Guides for any jurisdiction — income tax, VAT, payroll, corporate. Each Guide cites its source and shows whether it's a source-cited draft or accountant-reviewed.
list_skills · search_skills · get_skill
Guided workflows
Multi-step workflows for sole traders, freelancers, and corporate returns. The connector routes your prompt to the right sequence automatically.
start
Rates & thresholds
Current brackets, VAT thresholds, payroll rates, and filing deadlines — without leaving your AI session to hunt government sites.
get_rates
Cited working papers
Computation output structured for your review. Every line should trace to the Guide and source it came from, with its review status shown.
compare_jurisdictions · plan_cross_border
Why add it if the Guides are open?
Inspect everything. Add it when it helps.
The open files let you read, download and inspect individual Tax Guides. Added to your AI, OpenAccountants searches all the Tax Guides, selects the relevant material and retrieves the current published version during the conversation.
1,752
Open Tax Guides
241+
Jurisdictions covered