Openaccountants
Free, source-cited tax and accounting Guides that ChatGPT, Claude, Gemini and Cursor can pull through an MCP server, with accountant-led done-for-you services
The citable-knowledge approach is the point here, and OpenAccountants is one of the few places where an AI tax answer arrives with a named accountant and a statute attached. Free library, roughly two-minute MCP install, 37 MCP tools, and a public rule bundle endpoint that needs no key. The July 2026 release of dedicated Tax and VAT/GST MCP servers widens what agents can ask. It is not a filing service and not personalized advice — outputs are drafts. If you want answers an AI can be held to, this is the layer; if you want the work done, that is a separate engagement booked on a call.
Verified 4d ago · liveness 62/100 · cite: rightaichoice.com/tools/openaccountants
- Developers building AI agents that need source-cited, jurisdiction-specific tax rules
- Accountants who want a public, verifiable body of work without taking on clients
- Businesses operating across borders — selling, hiring or moving between countries
- Platforms embedding cited tax knowledge through MCP or the rule bundle endpoint
- Anyone who needs a return filed or tax paid — outputs are drafts, not a filing service
- Businesses expecting SLA-backed commercial API access today, since keyed REST access is on the roadmap
- Users in jurisdictions where no accountant has yet built or attested a Guide
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Skip OpenAccountants if you need a tax return prepared and filed, or contractually-backed production API access today — the library is a citable knowledge layer and its keyed REST API is still listed as on the roadmap.
The MCP server's read tools are public, but contribution and authoring tools require signing in through the connector rather than working anonymously.
The knowledge layer is free to use: browsing Guides, adding the MCP connector to your AI and pulling a jurisdiction's rule bundle anonymously cost nothing. That puts it below Tool-embedded tax calculation APIs that charge per call, and below full agency or outsourced-bookkeeping retainers. It is also narrower than those products — for commercial-scale embedding under your own brand, OpenAccountants becomes a quoted partnership rather than a metered plan, so budget for a sales conversation
In short
Openaccountants — Free, source-cited tax and accounting Guides that ChatGPT, Claude, Gemini and Cursor can pull through an MCP server, with accountant-led done-for-you services. Best for Developers building AI agents that need source-cited, jurisdiction-specific tax rules, Accountants who want a public, verifiable body of work without taking on clients, Businesses operating across borders — selling, hiring or moving between countries. Free to use.
What's new in Openaccountants
Checked 4 days agoAcross the latest 5 updates: 2 launches and 3 news mentions.
Two Assumptions That Will Break Tax Law Before We Reach Mars
Argues tax law assumes a taxable person and a taxable place, and that AI agents and space treaties dissolve both, leaving a gap no current doctrine covers.
OpenAccountants Tests AI Tax Citations With New Research Guardrails
Runs the same three tax research questions with and without the company's research guardrails; the notable failure mode was wrong answers carrying perfect citations.
OpenAccountants Publishes India Guide to F&O, Shares and Crypto Tax
Plain-language guide covering F&O taxed as business income, shares as capital gains, crypto at a flat 30%, plus a warning on F&O losses.
OpenAccountants Releases VAT MCP Server for AI Agents
VAT/GST MCP server targets place of supply, reverse charge, OSS, thresholds and shifting rates — the areas the company says AI fails hardest on.
OpenAccountants Ships Tax MCP Server for Claude, ChatGPT and Cursor
Tax MCP server gives assistants sourced, current rules to cite; the post covers what separates a real server from a demo and how to connect it.
What people actually say about Openaccountants — is it worth it?
We ran a structured research pass across product reviews, community discussions, and post-purchase forum threads to surface the patterns vendors won't publish themselves. Below: the recurring strengths, the hidden costs people mention most, and the cohort that consistently regrets adopting this tool.
2 mentions across 1 source (Hacker News) · researched Jul 3, 2026.
Average across the 1 source that answered — each source counts once, not each post.
- +Open-source with source-cited tax knowledge — no black box.
- +Directly addresses IRS warnings about AI hallucination in tax.
- +Free MCP connector works with Claude, ChatGPT, Cursor, Copilot.
- +Accountant-reviewed skills add human accountability.
- +Covers 192 jurisdictions including every US state.
- −Extremely thin community — no real-world usage reports.
- −No evidence of accountant participation or guide reviews.
- −Commercial API not yet available; free tier may be limited.
- −No uptime or performance guarantees documented.
- −Cannot verify accuracy of skills beyond stated claims.
- • Paid bounty opportunities for guide reviews suggest selected content may require payment
- • Future commercial API access will likely require paid subscription
Viability Score
How well maintained and how widely used is Openaccountants? Built from what the vendor actually publishes (docs, changelog, tutorials, integrations, pricing), whether the site is live, and how much real users discuss it. How we calculate this
Last calculated: October 2026
How we score →Key Features
- MCP server connecting OpenAccountants to ChatGPT, Claude, Gemini and Cursor
- Tax MCP server for Claude, ChatGPT and Cursor (launched July 2026)
- VAT/GST MCP server covering place of supply, reverse charge, OSS and thresholds (July 2026)
- 1,883 source-cited Tax Guides spanning tax, VAT, payroll, company setup and bookkeeping
- Coverage in 184 countries including US states and territories
- Guides authored or attested by named CPA, Chartered Accountant, ACCA, CPA Canada and Enrolled Agent professionals
- Three review states: written by the team, written by a named accountant, or attested by a second accountant
- Each Guide shows its sources, applicable period and version history
- 37 MCP tools exposed to compatible AI agents
- Anonymous public rule bundle endpoint returning a jurisdiction's rules as markdown, no auth or key
- /llms.txt endpoint for AI-agent discovery
- Public JSON accountant directory for routing users to a verified professional
- Accountants can draft, publish and invite peer attestation on Guides
- Coverage map showing accountant status by jurisdiction
- Done-for-you accounting services: bookkeeping, payroll, VAT/GST/sales tax, tax returns, year-end accounts and relocation
About Openaccountants
OpenAccountants is an open tax knowledge layer plus an accounting firm. The free half is a library of 1,883 accountant-written Guides covering tax, VAT, payroll, company setup and bookkeeping in 184 countries, each one showing its sources, its review status and the named CPA, Chartered Accountant, ACCA, CPA Canada or Enrolled Agent who stands behind it. You connect it to ChatGPT, Claude, Gemini or Cursor through an MCP server, sign in once, and your assistant answers from the Guide rather than from stale training data — the site's own example returns the South Africa VAT registration threshold of R2,300,000 from 1 April 2026, the 15% standard rate and the VAT201 filing cycle, credited to Werner Britz and cited to VAT Act s 23, s 27 and s 28. Developers get more than the connector: an anonymous public rule bundle endpoint returns every published rule for a jurisdiction as markdown with no auth or key, a /llms.txt file is available for agent discovery, and the MCP server exposes 37 tools. A public JSON accountant directory lets your agent route a user to a suitably qualified professional in their jurisdiction. The paid half is a conventional accounting service where AI does routine work and a named accountant is responsible for it — bookkeeping, payroll, VAT/GST and sales tax returns, company and personal tax returns, year-end accounts and relocation between countries. The site reports 842+ people helped, 4,293 questions answered through AI and 184 countries covered. Two honest caveats: automated outputs are drafts and do not create a professional engagement, and a jurisdiction appearing on the coverage map does not mean an accountant is available for paid work there. 2026 releases extended the connector line — a Tax MCP server for Claude, ChatGPT and Cursor shipped in July 2026, followed the same day by a VAT/GST MCP server aimed at place of supply, reverse charge, OSS and shifting thresholds.
Behind the Verdict
What OpenAccountants actually sells is accountability, and it is baked into the format rather than the marketing. Open any Guide and you see the sources, the applicable period, the review status and the person behind it. The site distinguishes three states — written by their team, written by a named accountant, or attested by a second accountant — which is a real distinction, not a badge. Peer attestation separates authorship from independent review, and that is the detail most AI tax products skip.For developers the consumption paths are unusually clean. The public rule bundle returns every published rule for a jurisdiction as markdown, cited to source, with no auth or key — you can evaluate it before you talk to anyone. The accountant directory is public JSON, so your agent can hand a user to a real professional instead of dead-ending. The MCP server's read tools are public, and contribution tools require sign-in through the connector. 37 MCP tools is a documented number, not a claim.Strengths: the citation trail. The July 2026 research guardrail tests surfaced wrong answers with perfect citations as the notable failure mode, which is the honest problem with citing AI. Coverage: 1,883 Guides across 184 countries, and named contributors spanning the US, UK, Canada, Australia, South Africa, India, Brazil, Kenya, Cyprus, Serbia and more. Published site figures: 842+ people helped, 4,293 AI-answered questions, 184 countries.Weaknesses worth knowing. Coverage is uneven — a country on the map does not mean an accountant is available to do paid work there. Commercial-scale use is a commercial relationship: an account, access terms and a keyed REST API that the docs list as on the roadmap, so teams needing SLA-backed production access today should plan around that. And the whole model rests on the Guides being current; the Site's own South Africa example is priced to an April 2026 threshold, so guide vintage matters more here than on a tool with no legal content.Where it fits: AI agent builders who need jurisdiction-specific tax rules with a paper trail; accountants who want a public, verifiable body of work without taking on client engagements; foreign businesses and investors checking VAT, GST and cross-border rules across several countries. Where it does not: anyone who needs a return filed, anyone who needs advice they can act on without their own sign-off, and teams that need a contractual API today.
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Real-world workflow fit
Concrete scenarios for the personas Openaccountants actually fits — and what changes day-one when you adopt it.
You add the MCP connector to your assistant, sign in once, and test questions against the public rule bundle endpoint and the 37 MCP tools before you commit to anything. A user asks about VAT registration in South Africa; the assistant returns R2,300,000 compulsory from 1 April 2026, voluntary from R120,000, 15% standard rate and a two-monthly VAT201 cycle, citing Werner Britz and VAT Act s 23, s
Outcome: You ship jurisdiction-specific tax answers with a citation trail instead of a model guessing, and you have a public accountant directory to route edge cases to a real professional.
You draft a Guide for your jurisdiction with AI assistance, publish it under your name, and invite a peer to attest to it — which the site treats as a distinct status from authorship.
Outcome: Your name and credentials sit on work your peers have reviewed, alongside contributors in the US, UK, Canada, South Africa, India, Brazil and Kenya, without committing you to client engagements.
You start with a question through your AI — VAT registration, hiring abroad, moving a company — and when the answer turns out to be more than a question, you book the free 30-minute call and get a written quote naming who is responsible and what is included.
Outcome: Bookkeeping, payroll, VAT/GST returns and year-end accounts move to the OpenAccountants team with the handover from your current setup handled, while AI does the routine work and a person stays answerable.
Use Cases
- Point your AI assistant at the MCP server so it answers VAT, payroll or company-setup questions from a cited Guide.
- Fetch a jurisdiction's full rule bundle as markdown to power your own tax calculator.
- Route a user to a suitably qualified accountant through the public directory from your platform.
- Check the VAT or GST registration threshold for a country before you commit to a structure.
- Draft and publish a Guide for your jurisdiction to build a public, verifiable record of expertise.
- Hand bookkeeping, payroll and filings to the in-house team when you stop wanting to do it yourself.
- Track Brazil's CBS, IBS and Selective Tax changes ahead of the 2026 transition as a foreign business.
Models Under the Hood
as of 2026-09-23
Limitations
- Automated outputs are drafts and do not create a professional engagement; the site says to obtain qualified advice before filing, paying or taking a material tax position.
- The MCP server's read tools, the anonymous rule bundle and the accountant directory are public, but contribution tools require sign-in through the connector, and consuming OpenAccountants at commercial scale under your own brand is a commercial relationship involving an account, access terms and a keyed REST API that the developer docs list as on the roadmap.
- A jurisdiction appearing on the coverage map does not mean an accountant is available for paid work there.
- Guide currency matters because the content is legal: the site's own South Africa example is written to a threshold taking effect 1 April 2026.
- Coverage sits at 1,883 Guides across 184 countries.
as of 2026-10-05
Verification history
We have re-verified Openaccountants 8 times since . Each pass re-reads the vendor's own pages and re-checks every listed field against that evidence; passes where nothing had changed are marked as such.
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
Showing the 6 most recent of 8 verification passes.
Free to cite with attribution — this page re-verifies continuously.
12-month cost
Project the real annual outlay, including the implied monthly cost when only an annual tier is published.
Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.
Plans compared
For each published Openaccountants tier: who it actually fits, and what it adds vs. the previous tier. Cross-reference the cost calculator above for projected annual outlay.
Free
$0/mo
Ideal for
Developers evaluating a citable tax layer, accountants who want to publish Guides, and anyone who just wants their AI to stop guessing at VAT and payroll questions.
What this tier adds
Free entry point: MCP connector for ChatGPT, Claude, Gemini and Cursor, 1,883 source-cited Guides across 184 countries, anonymous rule bundle endpoint, HTTP API access, public accountant directory and Guide publishing.
Platform Partners
Contact for pricing
Ideal for
Platforms and enterprises embedding the tax library commercially under their own brand, who need scoped terms rather than open endpoints.
What this tier adds
Adds commercial-scale access and scoped terms for platform and enterprise use on top of the free library; professional work is quoted separately.
Where the pricing makes sense
The company stage and team size where Openaccountants's pricing actually pencils out — and where peers do it cheaper.
The knowledge layer is free to use: browsing Guides, adding the MCP connector to your AI and pulling a jurisdiction's rule bundle anonymously cost nothing. That puts it below Tool-embedded tax calculation APIs that charge per call, and below full agency or outsourced-bookkeeping retainers. It is also narrower than those products — for commercial-scale embedding under your own brand, OpenAccountants becomes a quoted partnership rather than a metered plan, so budget for a sales conversation
Setup time & first value
How long it actually takes to get something useful out of Openaccountants — broken out by persona, not the marketing-page minute.
For developers, connecting an AI takes about two minutes — add the MCP connector to ChatGPT, Claude, Gemini or Cursor and sign in once. The rule bundle and accountant directory endpoints need no auth at all, so evaluation can start immediately. For accountants, drafting a Guide happens in the same session as sign-in. For businesses wanting the done-for-you services, the first step is a free
Switching to or from Openaccountants
How to bring data in from common predecessors and how to get it back out — written for the switcher, not the buyer.
- →From stale LLM training data: point the MCP connector at OpenAccountants so answers come from a cited Guide for the jurisdiction rather than from memory.
- →From a sales-tax-only calculation API: use the public rule bundle or MCP tools when you need more than a rate at checkout — place of supply, reverse charge, OSS and thresholds.
- →From assembling tax PDFs by hand: open the Guide for your country and get the law, the method, the steps and the reviewer in one place.
- →From an incumbent accountant: the team handles the handover from your current setup as part of taking the work on.
- ↗To your own in-house process: fetch a jurisdiction's rule bundle as markdown and serve it from your own service.
- ↗To a licensed local firm: the site says where work needs a local licence, such as an audit, they tell you on the first call and explain how they will handle it.
- ↗To a filing-only provider: nothing here files returns, so a local preparer remains necessary for lodgement.
Integrations
Resources & Guides
- Documentationopenaccountants.com
Docs · Openaccountants
Full product docs from openaccountants.com
- Quickstartopenaccountants.com
Quickstart · Openaccountants
Get up and running fast from openaccountants.com
- Documentationopenaccountants.com
Roadmap · Openaccountants
Full product docs from openaccountants.com
Tutorials & Learning
YouTube returned 6 videos for “Openaccountants”, and we withheld 6: 6 could not be judged, because “Openaccountants” is a single word that other videos use for other things. We are showing none, because we could not prove any of them are about Openaccountants.
Official links
Tools that pair well with Openaccountants
Common stack mates teams adopt alongside Openaccountants, with the specific reason each pairing earns its keep.
TaxGPT
AI tax assistant for accounting firms: cited research, memo drafting, and autonomous prep agents.
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Open-source MCP server that connects IDA Pro to LLM clients for AI-assisted reverse engineering
Workiva
Governed reporting platform that links finance, risk, and sustainability data so every number and narrative stays traceable and audit-ready.
Featured Head-to-Head Comparisons
Openaccountants vs Truleo
Truleo and Openaccountants serve entirely different markets. Truleo is purpose-built for law enforcement to connect siloed data and generate leads, while Openaccountants provides open-source tax knowledge for AI agent integration. Choose Truleo if you're a police agency needing automated intelligence; choose Openaccountants if you're a developer embedding tax rules into AI workflows.
Openaccountants vs Presto Voice
Choose Presto Voice if you run a QSR chain needing to automate drive-thru orders and boost revenue via upselling (proven with chains like Dairy Queen). Choose OpenAccountants if you're a developer or accountant needing free, source-cited tax data for AI agents—its open connector and recent IRS guidance on AI hallucination liability make it timely.
Openaccountants vs Bitsgap
Bitsgap is the clear choice for automated crypto trading with its diverse bots and multi-exchange support. Openaccountants stands out uniquely for AI-driven tax research with verified, jurisdiction-specific data. They serve entirely different use cases; pick based on whether you need trading automation or tax knowledge integration.
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