"Tools or methods for editing files using diffs" matching MCP connectors:

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

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

Pack a consignment into cartons, weigh it, and list what is inside each box for the waybill.

Email inboxes and calendars for AI agents: send, receive, search, draft and schedule.

What is known to be broken in an MCP server or API operation, with the check that found it.