Get Paid on Time With Automated Reminders

import requests
from datetime import datetime, timedelta

API = "https://api.multimail.dev/v1"
HEADERS = {"Authorization": "Bearer mm_live_xxx"}

REMINDER_TIERS = {
    -7: {"tone": "friendly", "subject": "Upcoming payment reminder"},
    -1: {"tone": "notice", "subject": "Payment due tomorrow"},
    1:  {"tone": "follow_up", "subject": "Payment past due"},
    7:  {"tone": "urgent", "subject": "Urgent: Payment overdue"},
    14: {"tone": "final", "subject": "Final notice: Payment required"}
}

def process_billing_reminders(invoices: list):
    today = datetime.utcnow().date()

    for invoice in invoices:
        if invoice["status"] == "paid":
            continue

        days_offset = (today - invoice["due_date"]).days
        tier = REMINDER_TIERS.get(days_offset)

        if tier:
            body = generate_reminder(
                tier["tone"], invoice["customer_name"],
                invoice["amount"], invoice["due_date"],
                invoice["payment_url"]
            )

            requests.post(
                f"{API}/send",
                headers=HEADERS,
                json={
                    "from": "[email protected]",
                    "to": invoice["customer_email"],
                    "subject": f"{tier[&"cm">#039;subject']}: ${invoice['amount']:.2f}",
                    "text_body": body
                }
            )

def generate_reminder(tone: str, name: str, amount: float,
                      due_date: str, payment_url: str) -> str:
    templates = {
        "friendly": (
            f"Hi {name},\n\n"
            f"Just a friendly reminder that your payment of "
            f"${amount:.2f} is due on {due_date}.\n\n"
            f"Pay now: {payment_url}\n\n"
            f"If you&"cm">#039;ve already sent payment, please disregard."
        ),
        "notice": (
            f"Hi {name},\n\n"
            f"Your payment of ${amount:.2f} is due tomorrow "
            f"({due_date}). Please ensure payment is submitted "
            f"to avoid any service interruption.\n\n"
            f"Pay now: {payment_url}"
        ),
        "urgent": (
            f"Dear {name},\n\n"
            f"Your payment of ${amount:.2f} was due on {due_date} "
            f"and remains outstanding. Please submit payment "
            f"immediately to avoid service suspension.\n\n"
            f"Pay now: {payment_url}\n\n"
            f"If you&"cm">#039;re experiencing difficulties, please reply "
            f"to discuss payment arrangements."
        )
    }
    return templates.get(tone, templates["friendly"])

"cm">// Using MultiMail MCP tools for billing reminders

async function sendBillingReminder(invoice: Invoice) {
  const today = new Date();
  const daysOffset = daysBetween(invoice.dueDate, today);
  const tier = getReminderTier(daysOffset);

  if (!tier) return; "cm">// Not a reminder day

  "cm">// Send reminder
  await mcp.send_email({
    to: invoice.customerEmail,
    subject: `${tier.subject}: $${invoice.amount.toFixed(2)}`,
    text_body: generateReminder(
      tier.tone, invoice.customerName,
      invoice.amount, invoice.dueDate, invoice.paymentUrl
    )
  });

  "cm">// Track reminder history
  await mcp.add_contact({
    email: invoice.customerEmail,
    metadata: {
      last_reminder_sent: today.toISOString(),
      reminder_tier: tier.tone,
      outstanding_amount: invoice.amount
    }
  });
}