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:

1. Call start({intent: "QSBS", jurisdiction: "US"}) (via the auto-invoked Skill)
2. Call get_skill({slug: "us-section-1202-qsbs"})
3. Walk you through the OBBBA-2025 tiered exclusion, the $75M asset cap, the SSTB exclusion list, California non-conformity, and the family-stacking strategy
4. Surface AUDIT FLASH POINT markers
5. 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

• Website: openaccountants.com
• Skills source (AGPL): github.com/openaccountants/openaccountants
• MCP server: https://www.openaccountants.com/api/mcp
• Universal MCP server-card: https://www.openaccountants.com/.well-known/mcp/server-card.json
• Verified accountant network: openaccountants.com/network
• Book a verified accountant: calendly.com/openaccountants-info/30min
• Cursor plugin (same MCP, different IDE): github.com/openaccountants/cursor-plugin
• LangChain example: github.com/openaccountants/langchain-example