"Servers that Enhance Productivity" matching MCP connectors:

Packing slips: cartons, contents, weights, chargeable weight and what is still to pack.

A4B CMMSOAuth

ai.a4b

[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/

DataGrout is an enterprise MCP gateway that connects AI agents to Salesforce (700+ tools), QuickBooks Online (550+ tools), Oracle Fusion Cloud (1,000+ tools), and any MCP-compatible system through a single endpoint. Semantic tool discovery surfaces the right tools from plain language goals without flooding the agent context with hundreds of schemas. Every workflow is verified with a Cognitive Trust Certificate before execution. Warden scans every tool output for prompt injection before it reache

Credit notes against an invoice or standalone: drafts, finalization, rendering, totals.

Issue a credit memo against an invoice or standalone, with per-line tax and totals.

A supplier directory that does not rot: contacts, payment terms, lead times, due-review report.

Keep a fixed asset register: cost, depreciation to date, disposals and net book value.

Dated deliverables against a quote or work order: due dates, sign-off, what is late, milestones.

Onboarding and inspection goods-receipts you reuse: dated runs, who ticked what, and a sign-off.

An equipment maintenance schedule and log: service entries, costs, and what is due or overdue.

Goods receipt notes vs purchase orders: tolerances, damaged/short units, CSV export.

Prove your books balance: every debit and credit for a month, to the minor unit.

A supplier directory that does not rot: contacts, terms, lead times, review dates.

Purchase orders for suppliers: VAT line items, a delivery date, an A4 PDF, mark received.

Lease schedules with a residual: the payment, the interest split and the journal per month.

Employee leave and PTO requests: balances, approvals, calendars, and who-is-out summaries.

Field service reports: hours, materials, sign-off, and the invoice the visit turns into.

Equipment maintenance log: assets, service entries with costs, and a due report from stored dates.

Job cards for trades and field service: hours and materials per job, open to invoiced.

Credit notes against your invoices and purchase orders to suppliers, with VAT and A4 PDFs.