Communicate Price Changes Without Losing Customers

import requests

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

def send_price_change(customer: dict, pricing: dict):
    body = (
        f"Hi {customer[&"cm">#039;name']},\n\n"
        f"We&"cm">#039;re writing to let you know about upcoming changes to "
        f"{pricing[&"cm">#039;plan_name']} pricing effective {pricing['effective_date']}.\n\n"
        f"Your current rate: ${pricing[&"cm">#039;current_price']}/month\n"
        f"New rate: ${pricing[&"cm">#039;new_price']}/month\n\n"
        f"Options available to you:\n"
        f"1. Lock in your current rate with an annual commitment\n"
        f"2. Switch to {pricing[&"cm">#039;alternative_plan']} at ${pricing['alternative_price']}/month\n"
        f"3. No action needed - your plan updates automatically on {pricing[&"cm">#039;effective_date']}\n\n"
        f"Questions? Reply to this email and we&"cm">#039;ll help."
    )

    return requests.post(
        f"{API}/send",
        headers=HEADERS,
        json={
            "from": "[email protected]",
            "to": customer["email"],
            "subject": f"Important: Changes to your {pricing[&"cm">#039;plan_name']} pricing effective {pricing['effective_date']}",
            "text_body": body
        }
    ).json()

import requests

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

"cm"># Check for customer responses
inbox = requests.get(
    f"{API}/mailboxes/billing-mailbox-id/inbox",
    headers=HEADERS,
    params={"status": "unread"}
).json()

for message in inbox["emails"]:
    email = requests.get(
        f"{API}/emails/{message[&"cm">#039;id']}",
        headers=HEADERS
    ).json()

    # Classify response type
    response_type = classify_response(email["text_body"])
    tags = ["price-change-response", response_type]
    
    if response_type == "cancellation-intent":
        tags.append("urgent-retention")
    
    requests.post(
        f"{API}/emails/{email[&"cm">#039;id']}/tags",
        headers=HEADERS,
        json={"tags": tags}
    )
    print(f"Response from {email[&"cm">#039;from']}: {response_type}")

"cm">// Price change notification via MCP

"cm">// 1. Find affected customers
const affected = await mcp.search_contacts({
  tags: ["pro-plan", "monthly-billing"]
});

"cm">// 2. Send segmented notifications
for (const customer of affected.contacts) {
  await mcp.send_email({
    from: "[email protected]",
    to: customer.email,
    subject: "Important: Changes to your Pro plan pricing effective May 1",
    text_body: `Hi ${customer.name}, your Pro plan rate will change from $29/mo to $35/mo on May 1. Lock in your current rate with an annual plan.`
  });
}

"cm">// 3. Monitor responses
const replies = await mcp.check_inbox({
  mailbox_id: "billing-mailbox-id",
  status: "unread"
});