Local Ops Kit This workflow corresponds to n8n.io template #16155 — we link there as the canonical source.
The workflow JSON
Copy or download the full n8n JSON below. Paste it into a new n8n workflow, add your credentials, activate. Full import guide →
{
"name": "Send a rescheduling email after a missed appointment",
"tags": [],
"nodes": [
{
"id": "overview-note",
"name": "Workflow guide",
"type": "n8n-nodes-base.stickyNote",
"position": [
-520,
-320
],
"parameters": {
"color": 4,
"width": 520,
"height": 580,
"content": "## Send a rescheduling email after a missed appointment\n\nThis workflow receives a missed-appointment webhook, validates the event, blocks ineligible contacts, sends one rescheduling email through Gmail, and returns a JSON acknowledgement.\n\n### Who it is for\n\nLocal businesses, agencies, and operators who receive appointment status updates from a CRM or scheduling system.\n\n### Setup\n\n1. Open **Configure recovery message** and set the business name, booking URL, and subject.\n2. Connect a customer-owned Gmail credential to **Send rescheduling email**.\n3. Send the example payload below to the test webhook.\n4. Confirm that non-missed appointments and contacts with `transactional_contact_allowed: false` do not send.\n5. Activate only after the business approves the message and data flow.\n\nThe imported workflow is inactive. Use a contact you control for testing."
},
"typeVersion": 1
},
{
"id": "payload-note",
"name": "Test payload",
"type": "n8n-nodes-base.stickyNote",
"position": [
-520,
300
],
"parameters": {
"color": 7,
"width": 440,
"height": 430,
"content": "## Example webhook payload\n\n```json\n{\n \"event_id\": \"evt_test_001\",\n \"contact\": {\n \"name\": \"Test Customer\",\n \"email\": \"operator-controlled@example.com\",\n \"transactional_contact_allowed\": true\n },\n \"appointment\": {\n \"id\": \"apt_test_001\",\n \"status\": \"missed\"\n }\n}\n```\n\nUse a stable, unique `event_id`. For production, add a Data Store lookup if your email provider does not support idempotency."
},
"typeVersion": 1
},
{
"id": "missed-webhook",
"name": "Receive missed appointment",
"type": "n8n-nodes-base.webhook",
"position": [
40,
0
],
"parameters": {
"path": "missed-appointment-recovery",
"options": {},
"httpMethod": "POST",
"responseMode": "responseNode"
},
"typeVersion": 2
},
{
"id": "configuration",
"name": "Configure recovery message",
"type": "n8n-nodes-base.set",
"position": [
280,
0
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "business-name",
"name": "business_name",
"type": "string",
"value": "Your Business"
},
{
"id": "booking-url",
"name": "booking_url",
"type": "string",
"value": "https://example.com/book"
},
{
"id": "email-subject",
"name": "email_subject",
"type": "string",
"value": "Would you like to reschedule?"
}
]
},
"includeOtherFields": true
},
"typeVersion": 3.4
},
{
"id": "prepare",
"name": "Validate event and prepare email",
"type": "n8n-nodes-base.code",
"position": [
520,
0
],
"parameters": {
"jsCode": "const p = $json.body || $json;\nconst required = [p.event_id, p.contact?.email, p.appointment?.id];\nif (required.some((value) => !value)) {\n throw new Error('Missing event_id, contact.email, or appointment.id');\n}\n\nconst status = String(p.appointment.status || '').toLowerCase();\nconst blocked = p.contact.transactional_contact_allowed === false || status !== 'missed';\nconst greeting = p.contact.name ? `Hi ${p.contact.name},` : 'Hi there,';\nconst message = `${greeting}\\n\\nWe missed you at your appointment with ${$json.business_name}. You can choose a new time here: ${$json.booking_url}\\n\\nReply to this email if you need help rescheduling.`;\n\nreturn [{\n json: {\n event_id: p.event_id,\n appointment_id: p.appointment.id,\n contact_email: p.contact.email,\n blocked,\n email_subject: $json.email_subject,\n message\n }\n}];"
},
"typeVersion": 2
},
{
"id": "allowed",
"name": "Is recovery allowed?",
"type": "n8n-nodes-base.if",
"position": [
760,
0
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "allowed-condition",
"operator": {
"type": "boolean",
"operation": "equals"
},
"leftValue": "={{ $json.blocked }}",
"rightValue": false
}
]
}
},
"typeVersion": 2.2
},
{
"id": "send",
"name": "Send rescheduling email",
"type": "n8n-nodes-base.gmail",
"onError": "continueErrorOutput",
"position": [
1000,
-100
],
"parameters": {
"sendTo": "={{ $json.contact_email }}",
"message": "={{ $json.message }}",
"options": {},
"subject": "={{ $json.email_subject }}",
"emailType": "text"
},
"typeVersion": 2.1
},
{
"id": "response",
"name": "Return webhook acknowledgement",
"type": "n8n-nodes-base.respondToWebhook",
"position": [
1240,
0
],
"parameters": {
"options": {},
"respondWith": "json",
"responseBody": "={{ { accepted: true, eventId: $json.event_id, blocked: $json.blocked || false } }}"
},
"typeVersion": 1.4
},
{
"id": "safeguards-note",
"name": "Production safeguards",
"type": "n8n-nodes-base.stickyNote",
"position": [
760,
260
],
"parameters": {
"color": 7,
"width": 420,
"height": 300,
"content": "## Production safeguards\n\n- Re-check appointment status before any delayed send.\n- Use a Data Store or provider idempotency key to suppress duplicate event IDs.\n- Keep the message transactional; do not add unrelated promotions.\n- Connect credentials owned by the end customer.\n- Review failed executions and provide a human support route."
},
"typeVersion": 1
}
],
"active": false,
"settings": {
"executionOrder": "v1"
},
"connections": {
"Is recovery allowed?": {
"main": [
[
{
"node": "Send rescheduling email",
"type": "main",
"index": 0
}
],
[
{
"node": "Return webhook acknowledgement",
"type": "main",
"index": 0
}
]
]
},
"Send rescheduling email": {
"main": [
[
{
"node": "Return webhook acknowledgement",
"type": "main",
"index": 0
}
],
[
{
"node": "Return webhook acknowledgement",
"type": "main",
"index": 0
}
]
]
},
"Configure recovery message": {
"main": [
[
{
"node": "Validate event and prepare email",
"type": "main",
"index": 0
}
]
]
},
"Receive missed appointment": {
"main": [
[
{
"node": "Configure recovery message",
"type": "main",
"index": 0
}
]
]
},
"Validate event and prepare email": {
"main": [
[
{
"node": "Is recovery allowed?",
"type": "main",
"index": 0
}
]
]
}
}
}
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About this workflow
This workflow receives missed-appointment events via a webhook, validates and filters them, then sends a single rescheduling email through Gmail and returns a JSON acknowledgement to the caller. Receives a POST webhook request containing appointment and contact details.…
Source: https://n8n.io/workflows/16155/ — original creator credit. Request a take-down →
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