"How to obtain an API key" matching MCP connectors:
Matching Connector Tools:
Secure MCP access to Big Red Cloud accounting data, workflows, help and training.
Conta Azul ERP MCP — sales, customers, finance and NF-e via OAuth 2.0. Read + write, 35 tools.
ConnectPlug (CPlug) POS and ERP for restaurants, food service and retail, with the full official RES
Financial & accounting management on Omie (Brazil's leading cloud ERP), payables/receivables, financ
Olist Tiny e-commerce ERP (formerly Tiny ERP) with the full official REST API v3, products, stock, o
Microvix retail ERP (Linx, part of the Stone group) for store chains and franchises, via the officia
Bling ERP (SMB and e-commerce management, by Locaweb) via the official v3 API, sales orders, product
Financial management on Procfy — transactions (revenue/expense/transfers), bank accounts, contacts,
QuickBooks MCP Pack — query customers, invoices, and accounts via QuickBooks Online API.
Financial and accounting reconciliation on F360 Finanças (management for retail chains and franchise
ERP français avec serveur MCP natif : plus de 1 800 actions métier auto-générées via OpenAPI.
Chat-first business management. 22 industry templates, 14 widgets. Manage clients, sales, inventory via natural language. OAuth 2.0 authentication.
8 EU accounting (x402 USDC on Base): reconcile, VAT, invoicing. Free health.
Brazilian AI-powered accounting & tax automation: NFS-e invoicing, CBS/IBS tax reform, compliance.
Headless API-first double-entry accounting & bookkeeping engine. 84 MCP tools over HTTP.
AEC subcontractor vendor procurement plumbing layer. Preview - V3 launches 2027.
[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/