@mindstone/mcp-server-quickbooks

QuickBooks Online MCP server for Model Context Protocol hosts. Manage invoices, bills, customers, vendors, employees, and accounts in QuickBooks Online through a standardised MCP interface.

⚠️ Breaking change in 0.3.0 — production writes are gated by default

Starting with version 0.3.0, every QuickBooks-mutating tool (create_quickbooks_invoice, create_quickbooks_bill, create_quickbooks_customer, create_quickbooks_vendor) is secure-by-default: the tool refuses to execute and returns a structured error unless the host sets QB_ALLOW_PROD_WRITES=1 in the environment. Read-only tools (list_*, get_*, query_*, configure_quickbooks) are unaffected.

This is a deliberate guard-rail to prevent an LLM agent from accidentally writing to a real QuickBooks production company. Hosts that have integrated 0.2.x and rely on those mutating tools must opt in by setting the environment variable on the next upgrade.

Migration from 0.2.x → 0.3.0

To preserve the previous (write-enabled) behaviour, add QB_ALLOW_PROD_WRITES=1 to the env block of your host configuration alongside the existing QUICKBOOKS_* variables. Without it, the four mutating tools will return:

{
  "ok": false,
  "error": "QuickBooks mutating tools refuse to run unless QB_ALLOW_PROD_WRITES=1 is set. ...",
  "code": "QB_ALLOW_PROD_WRITES_REQUIRED"
}

We strongly recommend keeping the gate closed in any host where the LLM should not be able to issue production writes (sandbox, staging, demo, or read-only analyst workflows). Set the variable only in environments where QuickBooks writes are an intentional capability.

Requirements

• Node.js 20+
• npm

Quick Start

Install & build

cd <path-to-repo>/connectors/quickbooks
npm install
npm run build

npx (once published)

npx -y @mindstone/mcp-server-quickbooks

Local

node dist/index.js

Configuration

Environment variables

• QUICKBOOKS_CLIENT_ID — Intuit Developer app client ID
• QUICKBOOKS_CLIENT_SECRET — Intuit Developer app client secret
• QUICKBOOKS_REFRESH_TOKEN — OAuth 2.0 refresh token
• QUICKBOOKS_REALM_ID — QuickBooks company (realm) ID
• QUICKBOOKS_ENVIRONMENT — sandbox or production (default: production)
• QB_ALLOW_PROD_WRITES — set to exactly 1 to enable the four mutating tools (create_quickbooks_invoice, create_quickbooks_bill, create_quickbooks_customer, create_quickbooks_vendor). Any other value (unset, empty, true, yes, 0, …) keeps the secure-by-default gate closed and the mutating tools refuse to run. Read-only tools are unaffected. Required since 0.3.0 to preserve 0.2.x write behaviour.
• MCP_HOST_BRIDGE_STATE — optional path to a host bridge state file used for credential management
• MINDSTONE_REBEL_BRIDGE_STATE — backwards-compatible alias for MCP_HOST_BRIDGE_STATE

Host configuration examples

Claude Desktop / Cursor

{
  "mcpServers": {
    "QuickBooks": {
      "command": "npx",
      "args": ["-y", "@mindstone/mcp-server-quickbooks"],
      "env": {
        "QUICKBOOKS_CLIENT_ID": "your-client-id",
        "QUICKBOOKS_CLIENT_SECRET": "your-client-secret",
        "QUICKBOOKS_REFRESH_TOKEN": "your-refresh-token",
        "QUICKBOOKS_REALM_ID": "your-realm-id"
      }
    }
  }
}

Local development (no npm publish needed)

{
  "mcpServers": {
    "QuickBooks": {
      "command": "node",
      "args": ["<path-to-repo>/connectors/quickbooks/dist/index.js"],
      "env": {
        "QUICKBOOKS_CLIENT_ID": "your-client-id",
        "QUICKBOOKS_CLIENT_SECRET": "your-client-secret",
        "QUICKBOOKS_REFRESH_TOKEN": "your-refresh-token",
        "QUICKBOOKS_REALM_ID": "your-realm-id"
      }
    }
  }
}

Tools (13)

Configuration

• configure_quickbooks — Configure QuickBooks Online OAuth credentials

Query

• query_quickbooks — Run a QuickBooks query using QuickBooks Query Language
• get_quickbooks_entity — Get a single entity by type and ID

Customers

• list_quickbooks_customers — List customers
• create_quickbooks_customer — Create a new customer

Vendors

• list_quickbooks_vendors — List vendors
• create_quickbooks_vendor — Create a new vendor

Invoices

• list_quickbooks_invoices — List invoices
• create_quickbooks_invoice — Create a new invoice

Bills

• list_quickbooks_bills — List bills (accounts payable)
• create_quickbooks_bill — Create a new bill

Employees

• list_quickbooks_employees — List employees

Accounts

• list_quickbooks_accounts — List chart of accounts

Licence

FSL-1.1-MIT — Functional Source License, Version 1.1, with MIT future licence. The software converts to MIT licence on 2030-04-08.