Dunn

Reliability

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How to connect

Add it to any MCP client that supports remote servers.

{
  "mcpServers": {
    "dunn": {
      "type": "http",
      "url": "https://getdunn.org/mcp"
    }
  }
}

4 tools

• invoice_due_date

  Exact due date for an invoice from its date and payment terms ("net 30", "due on receipt", "EOM", "net 30 EOM", "2/10 net 30"), including any early-payment discount date.

• late_fee_calculator

  Works out a late fee: the amount, the new total, the exact day it applies, a ready-to-use line for the invoice, and whether the fee is in the usual range.

• how_late_is_this_invoice

  How many days late an invoice is (or until it is due), and what to send the client now and next, following a proven reminder schedule.

• payment_reminder_email

  Writes the right payment reminder for where the invoice is now (before due, due today, late, or a final notice), with subject line. Polite by default; firm on request.

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