Use OpenAccountants — 800+ accountant-verified tax skills across 190+ jurisdictions — inside Windsurf via the Cascade panel's MCP support.
Open ~/.codeium/windsurf/mcp_config.json (create it if it doesn't exist) and add:
{
"mcpServers": {
"openaccountants": {
"serverUrl": "https://www.openaccountants.com/api/mcp"
}
}
}Restart Windsurf. Open Cascade, type a tax question, and the agent will call OpenAccountants automatically.
- Open Windsurf → click the MCPs icon in the Cascade panel's top-right menu (or open
Windsurf Settings → Cascade → MCP Servers) - Search OpenAccountants
- Click Install
- Restart Cascade
Status: marketplace listing pending — discoverable via Smithery (the upstream registry Windsurf pulls from). Until then, use the manual install above.
| Tool | Purpose |
|---|---|
start |
Front door — pass intent + jurisdiction → ready-to-execute plan |
list_skills |
List published skills filtered by jurisdiction / category |
get_skill |
Fetch full markdown + provenance footer for one skill |
get_skill_sections |
Same content split into sections (for very large skills) |
search_skills |
Keyword search across published skill content |
All read-only. Rate-limited at 60 req/min per IP. No auth, no signup.
After installing, ask Cascade:
I'm a Maltese freelancer earning EUR 45,000 from foreign clients. What VAT obligations do I have, and is there a small-enterprise scheme I should consider?
Cascade should call start({intent: 'VAT', jurisdiction: 'MT'}), then get_skill({slug: 'malta-vat-return'}), then walk you through Malta VAT Article 10 vs Article 11, the EUR 35,000 threshold, EU reverse charge logic, and the Calendly link for a verified Malta accountant.
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.
- Website: openaccountants.com
- Skills source: github.com/openaccountants/openaccountants (AGPL-3.0)
- MCP server:
https://www.openaccountants.com/api/mcp - Universal 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
MIT (this docs repo). Underlying skill content remains AGPL-3.0 with attribution per LICENSE-ADDITIONAL.md in the skills repo.