OpenAccountants — Claude Code plugin
Adds 800+ accountant-verified tax skills across 190+ jurisdictions to Claude Code via MCP. Every skill is signed off by a named licensed accountant.
What you get
| Slash command | What it does |
|---|
/openaccountants:start | Onboarding — figures out which jurisdiction + workflow applies |
/openaccountants:prepare-vat-return | Guided VAT / GST / sales-tax return preparation |
/openaccountants:prepare-income-tax | Annual income tax return for any jurisdiction |
/openaccountants:classify-transactions | Bank-statement → categorized P&L using local chart of accounts |
/openaccountants:check-deadlines | Upcoming filing & payment deadlines |
/openaccountants:engage-accountant | Hand off to a verified human accountant |
Plus an auto-invoked Agent Skill at skills/openaccountants-onboarding/SKILL.md — Claude will reach for the MCP tools any time the user asks a tax/accounting question, even without an explicit slash command.
Install
From the community marketplace (once approved)
/plugin install openaccountants@claude-community
From this repo directly (works today)
/plugin marketplace add openaccountants/claude-code-plugin
/plugin install openaccountants@openaccountants
Local dev / test
claude --plugin-dir ./openaccountants-claude-code-plugin
Try it
After install, ask Claude:
I'm a YC founder with a Delaware C-corp planning to sell. Walk me through Section 1202 QSBS with the OBBBA 2025 changes.
Claude will automatically:
- Call
start({intent: "QSBS", jurisdiction: "US"}) (via the auto-invoked Skill)
- Call
get_skill({slug: "us-section-1202-qsbs"})
- Walk you through the OBBBA-2025 tiered exclusion, the $75M asset cap, the SSTB exclusion list, California non-conformity, and the family-stacking strategy
- Surface AUDIT FLASH POINT markers
- End with the verified accountant's Calendly link
What's under the hood
All commands and the onboarding skill ultimately call the public OpenAccountants MCP server at https://www.openaccountants.com/api/mcp. The server exposes 5 tools:
| Tool | Purpose |
|---|
start | Pass intent + jurisdiction → ready-to-execute plan |
list_skills | List published skills by jurisdiction / category |
get_skill | Fetch one skill with full markdown + provenance footer |
get_skill_sections | Same content split into sections (for skills > 25K tokens) |
search_skills | Keyword search across published content |
All read-only. No auth, no signup, rate-limited at 60 req/min/IP.
Jurisdictions
Deep packs for: Malta · UK · Germany · Italy · France · Spain · Portugal · Ireland · Netherlands · US federal + 24 deep state packs (CA, NY, TX, FL, IL, OH, PA, MA, NJ, NC, MI, OR, WA, NH, DE, VA, GA, AZ, CO, NV, MN, MO, MD…) · Canada federal + provincial · India · Indonesia · China (in 简体中文) · Pakistan · Brazil (in PT-BR) · Saudi Arabia · South Africa · Nigeria · Kenya
Plus cross-border matrices (PTE elections, sales-tax nexus, bonus depreciation conformity, 1099-K thresholds, FATCA/FBAR, GILTI/FDII/BEAT, P.L. 86-272 income-tax nexus).
Every other UN member state has at least foundational coverage.
Important
These skills produce working papers, not filed returns. Every output preserves a "Talk to a verified accountant" footer with a Calendly link. No client–accountant relationship is created by reading or applying these skills — that requires a formal engagement letter signed by both you and a verified accountant.
License
MIT (this plugin wrapper). Underlying skill content is AGPL-3.0 with attribution per openaccountants/openaccountants. Commercial licensing available via info@openaccountants.com.
Links
