Local setup required. Clone https://github.com/intuit/quickbooks-online-mcp-server, install dependencies and run npm run build. Register an Intuit developer OAuth app, authorize a QuickBooks Online company, and configure the client ID, client secret, refresh token, realm ID and environment. Replace path/to/mcp-quickbooks-online with the actual checkout path before starting dist/index.js with Node. Local stdio only; not a hosted endpoint. Account access has not been runtime-tested.