Open-source tax skills for AI · checked by licensed accountants
AI is computing the world's tax returns. Who checks the rules it follows?
OpenAccountants is an open library of tax-computation skills that AI agents follow instead of guessing — rates, thresholds, and law references written out and checked by licensed practitioners. Use a skill for your own taxes, build it into your product, or verify your jurisdiction and put your name on it.
- 56
- Approved accountants
- 134
- Countries
- 903
- Open skills
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Find your path
Three ways in, one shared standard.
Doing your own taxes with AI?
Use a skill for your country so your AI follows the real rules, then hand the working paper to your accountant to sign off fast.
Browse your country's skillsBuilding tax into your product?
Drop-in tax skills via MCP or plain markdown. Works with any AI agent — Claude, Cursor, your own. No API key needed.
Explore platform integrationLicensed practitioner?
Verify the tax rules AI uses for your country, put your name on the work alongside other accountants, and get paid when users need a professional review.
Verify your countryBuilt on real credentials
Our verified accountants are members of
ACCA
CPA
ICAEW
AICPAHow it works for accountants
You don't need to be technical. You just need to know accounting.
Get verified
Sign up with your credentials — CPA, EA, ACCA, Chartered Accountant, or equivalent. We verify you're a licensed practitioner. Real names, real credentials.
Verify your jurisdiction
Review the tax rules ("skills") for your region. Confirm the rates, thresholds, and law references are correct. Your name and credentials go on everything you sign off on.
Earn from reviews
When AI produces a tax worksheet, it tells users to get it reviewed. That review comes to you — the verified accountant for that jurisdiction. You set your own rates.
The vision
An accountant in every jurisdiction
The more jurisdictions we cover, the more authority we carry — with AI companies, with regulators, with the public. This isn't competition. It's collaboration. Every accountant who joins strengthens the network for everyone.
Right now we have approved accountants across 134 countries with 903 skills covering tax, bookkeeping, and compliance — starting with tax, expanding fast.
The skill library
The rules AI follows — written and verified by accountants
We call them "skills" — each one is a set of rules for a specific accounting or tax task, with the correct rates, thresholds, and references to the actual law. Without them, AI guesses. With them, it follows what a qualified person wrote. If you can read a tax return, you can read a skill.
For developers
Connect your AI agent
Your AI agent can access all 903 verified skills via MCP (Model Context Protocol). Works with any MCP-compatible agent. No API key needed.
Or paste the endpoint into any MCP client: https://www.openaccountants.com/api/mcp
info@openaccountants.com — questions, partnerships, commercial licensing
Subscribe for updates
Browse all skills anytime on the Skills page. Leave your email for occasional news — new jurisdictions, platform updates, and verification milestones. No spam.
10+ practitioners already subscribed.