"React Query" matching MCP connectors:

QuickBooks MCP Pack — query customers, invoices, and accounts via QuickBooks Online API.

Log, query, and edit expenses, budgets, and accounts in Ledgy from any MCP-compatible AI assistant.

[A4B](https://a4b.ai/) is a flat-rate CMMS (asset & maintenance management) that ships a native MCP server — an integration still uncommon in the CMMS category. AI assistants like Claude and ChatGPT can query asset inventory, create and update assets and maintenance tasks, search history, and generate reports. Secured with OAuth sign-in, audit logging, and per-organization isolation. Docs: https://docs.a4b.ai/mcp/

Vietnam MISA meInvoice: AI agents create, publish and query e-invoices, stateless BYO.

Search, query, and update budgets, transactions, contacts, and purchase orders in Saturation.

BETA — Run SuiteQL, read/write NetSuite records, query SuiteAnalytics, and run saved bookmarks.