OpenAccountants

Open-source Tax Guides your AI can cite — reviewed by named, licensed accountants.

Every AI can do tax math. None of them can stand behind an answer. Here, real accountants put their name, credential and review date on the Guides your AI reads — publicly, on the record, in this repo.

License: AGPL-3.0 PyPI smithery badge GitHub stars

1,796 Guides across 233 jurisdictions · 196 accountant-reviewed · 35 named accountants · 6,354 questions answered through connected AIs

Live from openaccountants.com — updated 2026-08-17 by the nightly sync.

Try it in 60 seconds

Add the hosted connector to Claude, ChatGPT, Cursor, Windsurf or any MCP client:

https://www.openaccountants.com/api/mcp

Guided setup: openaccountants.com/connect

Then ask a question your AI would otherwise guess at:

"What's the combined sales tax rate in Manatee County, Florida for 2026?"

Without OpenAccountants, models answer from training data. With it, the answer cites the current Guide — and names the accountant who reviewed it.

You:    "I'm a freelancer in South Africa. What do I owe?"
          ↓  loads za-income-tax, za-provisional-tax
AI:     ITR12 working paper · IRP6 provisional schedule
        Medical credits · Retirement annuity deduction
        ─────────────────────────────────────────
        Reviewed by Werner Britz CA(SA)
  • pip MCP server: pip install openaccountants-mcp (mirrors this repo's packages/)
  • Manual: download your jurisdiction's folder from packages/ and upload the files to your AI. Start with your country's main package; index.json is the machine-readable inventory.

Two states, greppable honesty

Every Guide is in exactly one state — and the repo greps honestly:

State Meaning
Accountant-reviewed A named, licensed accountant reviewed the complete Guide. Their name is in the frontmatter (reviewed_by:) and on the public roster
Source-cited draft Written from primary legislation, every figure cited to its source — not yet professionally reviewed

⚠️ General reference, not advice. Guides may be incomplete, outdated, or wrong for your facts. Have a qualified professional review outputs before filing, payment, or action.

Are you an accountant?

Your name on the tax knowledge AI actually uses — with attribution built in:

  1. Build a Guide for the work you know cold: openaccountants.com/skills/new. It publishes credited to you, and lands in this repo under your name.
  2. Review a Guide in your jurisdiction — your name, credential and review date go on it, here and on every AI answer that cites it.
  3. Set your GitHub username in your profile and your platform edits are committed to this repo as you — your contribution graph reflects your work.

The current roster: VERIFIERS.md (generated nightly from the platform).

Contributing

Edit skills/** only — everything else regenerates automatically:

  • packages/, index.json, llms-full.txt — generated nightly; never edit in a PR
  • Merged source PRs are credited to you and must be confirmed as ingested before the next platform export
  • Full guide: CONTRIBUTING.md · Layout: docs/REPO-LAYOUT.md

For developers

What Where
Guide source (per jurisdiction) skills/
Per-country bundles (generated) packages/
Machine-readable inventory index.json
LLM entry point llms.txt
Python MCP server mcp/ · PyPI
Repo architecture + sync docs/REPO-LAYOUT.md · docs/WEBSITE-SYNC.md

API and platform integrations: openaccountants.com/for-developers

License

Contact: [email protected] · Security policy · Cite this repo