Accountsos MCP Server

AccountsOS MCP Server

Query your live AccountsOS ledger from any MCP client (Claude Desktop, Claude Code, Cursor) via the Model Context Protocol.

AccountsOS runs jurisdiction playbooks for 26 countries. The UK is the proof jurisdiction, with live HMRC MTD VAT filing.

npm: https://www.npmjs.com/package/@thriveventurelabs/accountsos-mcp

Installation

Option 1: Global Install (Recommended)

npm install -g @thriveventurelabs/accountsos-mcp

Then add to Claude Desktop config:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "accountsos": {
      "command": "accountsos-mcp",
      "args": [],
      "env": {
        "ACCOUNTSOS_API_KEY": "your-api-key-here"
      }
    }
  }
}

Option 2: Using npx

{
  "mcpServers": {
    "accountsos": {
      "command": "npx",
      "args": ["--yes", "@thriveventurelabs/accountsos-mcp@latest"],
      "env": {
        "ACCOUNTSOS_API_KEY": "your-api-key-here"
      }
    }
  }
}

Get your API key from AccountsOS Settings.

Available Tools

Read Operations

Write Operations

Available Resources

Example Prompts

Once connected, try asking Claude:

• "What's my account balance?"
• "Show me transactions from last month"
• "When is my next VAT deadline?"
• "How much have I spent on software subscriptions?"
• "Create a transaction for lunch with a client, £45"
• "What's my VAT summary for Q4 2024?"

Development

# Install dependencies
npm install

# Build
npm run build

# Run locally (for testing)
ACCOUNTSOS_API_KEY=sk_live_xxx npm start

Environment Variables

Troubleshooting

Server disconnected

Check logs at ~/Library/Logs/Claude/mcp-server-accountsos.log

npx issues

If npx has caching issues, use global install instead:

npm install -g @thriveventurelabs/accountsos-mcp

Disclaimer

This software provides general guidance about UK tax and accounting rules. It is not a substitute for professional advice from a qualified accountant or tax adviser. Always verify with HMRC source documents and consult a professional for advice specific to your circumstances.

License

MIT