This workflow follows the Chainllm → Gmail recipe pattern — see all workflows that pair these two integrations.
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 →
{
"updatedAt": "2026-05-22T22:09:22.352Z",
"createdAt": "2026-05-22T22:07:56.121Z",
"id": "WORKFLOW_ID",
"name": "Doctor Clinic Appointment Booking System",
"description": null,
"active": false,
"isArchived": false,
"nodes": [
{
"parameters": {
"httpMethod": "POST",
"path": "book-appointment",
"responseMode": "responseNode",
"options": {}
},
"id": "c7036696-ef81-4329-8cdb-379609a0fc6a",
"name": "New Appointment Webhook",
"type": "n8n-nodes-base.webhook",
"typeVersion": 2,
"position": [
-688,
176
]
},
{
"parameters": {
"jsCode": "const body = $input.item.json.body || $input.item.json;\n\nconst patientName = body.patient_name || body.name || '';\nconst patientEmail = body.patient_email || body.email || '';\nconst patientPhone = body.patient_phone || body.phone || '';\nconst doctorName = body.doctor_name || body.doctor || 'Dr. Smith';\nconst appointmentDate = body.appointment_date || body.date || '';\nconst appointmentTime = body.appointment_time || body.time || '';\nconst appointmentType = body.appointment_type || body.type || 'General Consultation';\nconst notes = body.notes || body.reason || '';\n\nif (!patientEmail || !appointmentDate || !appointmentTime) {\n return [{ json: { error: 'Missing required fields: email, date, or time' } }];\n}\n\nconst bookingId = 'APT-' + Date.now();\nconst dateTimeStr = appointmentDate + 'T' + appointmentTime + ':00';\nconst startDateTime = new Date(dateTimeStr).toISOString();\nconst endDateTime = new Date(new Date(dateTimeStr).getTime() + 30 * 60000).toISOString();\n\nreturn [{ json: {\n patientName,\n patientEmail,\n patientPhone,\n doctorName,\n appointmentDate,\n appointmentTime,\n appointmentType,\n notes,\n bookingId,\n startDateTime,\n endDateTime,\n createdAt: new Date().toISOString()\n}}];"
},
"id": "c9297a0a-eb3d-4092-a624-51a3ade89dc7",
"name": "Parse Booking Data",
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
-464,
176
]
},
{
"parameters": {
"authentication": "serviceAccount",
"operation": "appendOrUpdate",
"documentId": {
"mode": "list",
"__rl": true,
"value": "YOUR_GOOGLE_SHEET_ID"
},
"sheetName": {
"mode": "list",
"__rl": true,
"value": "gid=0"
},
"columns": {
"mappingMode": "defineBelow",
"value": {
"Booking ID": "={{ $json.bookingId }}",
"Patient Name": "={{ $json.patientName }}",
"Patient Email": "={{ $json.patientEmail }}",
"Patient Phone": "={{ $json.patientPhone }}",
"Doctor": "={{ $json.doctorName }}",
"Date": "={{ $json.appointmentDate }}",
"Time": "={{ $json.appointmentTime }}",
"Type": "={{ $json.appointmentType }}",
"Notes": "={{ $json.notes }}",
"Status": "Confirmed",
"Created At": "={{ $json.createdAt }}"
}
},
"options": {}
},
"id": "48a3ef7c-9f6e-4208-94f9-b76cb5724eac",
"name": "Save to Appointments Sheet",
"type": "n8n-nodes-base.googleSheets",
"typeVersion": 4.4,
"position": [
-144,
-144
]
},
{
"parameters": {
"calendar": {
"mode": "list",
"__rl": true,
"value": "YOUR_GOOGLE_CALENDAR_ID"
},
"start": "={{ $json.startDateTime }}",
"end": "={{ $json.endDateTime }}",
"additionalFields": {
"attendees": [
{
"email": "={{ $json.patientEmail }}"
}
],
"description": "=Patient: {{ $json.patientName }}\nEmail: {{ $json.patientEmail }}\nPhone: {{ $json.patientPhone }}\nType: {{ $json.appointmentType }}\nBooking ID: {{ $json.bookingId }}\nNotes: {{ $json.notes }}",
"location": "Clinic \u2014 Room 1",
"sendUpdates": "all",
"summary": "={{ $json.appointmentType }} \u2014 {{ $json.patientName }}"
}
},
"id": "6ab3b118-c7b5-4a42-8669-64d17add6275",
"name": "Add to Google Calendar",
"type": "n8n-nodes-base.googleCalendar",
"typeVersion": 1.3,
"position": [
224,
176
]
},
{
"parameters": {
"promptType": "define",
"text": "=You are a professional medical clinic assistant. Write a warm, reassuring appointment confirmation email.\n\nAppointment details:\n- Patient Name: {{ $json.patientName }}\n- Doctor: {{ $json.doctorName }}\n- Date: {{ $json.appointmentDate }}\n- Time: {{ $json.appointmentTime }}\n- Type: {{ $json.appointmentType }}\n- Booking ID: {{ $json.bookingId }}\n- Notes: {{ $json.notes }}\n\nEmail requirements:\n- Subject: clear confirmation with date and time\n- Tone: warm, professional, reassuring\n- Include all appointment details clearly\n- What to bring: ID, insurance card, arrive 10 mins early\n- Cancellation policy: cancel 24hrs before\n- Clinic contact details placeholder: [CLINIC_PHONE] and [CLINIC_ADDRESS]\n- Friendly closing\n\nRespond with valid JSON only. No markdown, no backticks:\n{\n \"subject\": \"email subject\",\n \"body\": \"full email body with line breaks as \\n\"\n}"
},
"id": "dc485b9d-3efa-44e0-8979-f41271320985",
"name": "Generate Confirmation Email",
"type": "@n8n/n8n-nodes-langchain.chainLlm",
"typeVersion": 1.4,
"position": [
-208,
320
]
},
{
"parameters": {
"model": "llama-3.3-70b-versatile",
"options": {}
},
"id": "1e6ebb6b-3d7c-49d2-b2b8-01672430be89",
"name": "Groq Chat Model",
"type": "@n8n/n8n-nodes-langchain.lmChatGroq",
"typeVersion": 1,
"position": [
-272,
512
]
},
{
"parameters": {
"jsCode": "let raw = $input.item.json.text || $input.item.json.output || '';\nraw = raw.replace(/```json|```/g, '').trim();\ntry {\n const parsed = JSON.parse(raw);\n const booking = $('Parse Booking Data').item.json;\n return [{ json: { ...booking, subject: parsed.subject, body: parsed.body } }];\n} catch(e) {\n return [{ json: { error: e.message, raw } }];\n}"
},
"id": "2a9c0170-ec32-4613-8ce1-54c09919f19f",
"name": "Parse Confirmation Email",
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
176,
416
]
},
{
"parameters": {
"sendTo": "={{ $json.patientEmail }}",
"subject": "={{ $json.subject }}",
"emailType": "text",
"message": "={{ $json.body }}",
"options": {
"replyTo": "clinic@yourdomain.com"
}
},
"id": "ea745b0f-f7fc-47d2-9406-9adf2637fe37",
"name": "Send Confirmation to Patient",
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1,
"position": [
384,
432
]
},
{
"parameters": {
"sendTo": "doctor@yourclinic.com",
"subject": "=New Appointment: {{ $json.patientName }} \u2014 {{ $json.appointmentDate }} at {{ $json.appointmentTime }}",
"emailType": "text",
"message": "=New appointment booked.\n\nPatient: {{ $json.patientName }}\nEmail: {{ $json.patientEmail }}\nPhone: {{ $json.patientPhone }}\nDate: {{ $json.appointmentDate }}\nTime: {{ $json.appointmentTime }}\nType: {{ $json.appointmentType }}\nBooking ID: {{ $json.bookingId }}\nNotes: {{ $json.notes }}\n\nAdded to Google Calendar automatically.",
"options": {}
},
"id": "f0768cf0-318b-4264-b668-fc401115f7b8",
"name": "Notify Doctor",
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1,
"position": [
304,
-128
]
},
{
"parameters": {
"rule": {
"interval": [
{
"field": "cronExpression",
"expression": "0 8 * * *"
}
]
}
},
"id": "a2828bbb-c95d-4a0c-bd62-d767cc24480e",
"name": "Daily Reminder Check (8AM)",
"type": "n8n-nodes-base.scheduleTrigger",
"typeVersion": 1.1,
"position": [
-256,
768
]
},
{
"parameters": {
"authentication": "serviceAccount",
"operation": "getAll",
"documentId": {
"mode": "list",
"__rl": true,
"value": "YOUR_GOOGLE_SHEET_ID"
}
},
"id": "77576ab7-80ec-4fec-87dc-c8d15a4df72f",
"name": "Get Confirmed Appointments",
"type": "n8n-nodes-base.googleSheets",
"typeVersion": 4.4,
"position": [
-32,
768
]
},
{
"parameters": {
"jsCode": "const appointments = $input.all();\nconst tomorrow = new Date();\ntomorrow.setDate(tomorrow.getDate() + 1);\nconst tomorrowStr = tomorrow.toISOString().split('T')[0];\n\nconst tomorrowAppts = appointments.filter(item => {\n const apptDate = item.json['Date'] || '';\n return apptDate === tomorrowStr;\n});\n\nreturn tomorrowAppts.map(item => ({ json: item.json }));"
},
"id": "7c706415-ab12-45bf-b295-8e970f6c863f",
"name": "Filter Tomorrows Appointments",
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
192,
768
]
},
{
"parameters": {
"sendTo": "={{ $json['Patient Email'] }}",
"subject": "=Reminder: Your appointment tomorrow at {{ $json['Time'] }}",
"emailType": "text",
"message": "=Dear {{ $json['Patient Name'] }},\n\nThis is a friendly reminder that you have an appointment scheduled for tomorrow.\n\nAppointment Details:\n- Doctor: {{ $json['Doctor'] }}\n- Date: {{ $json['Date'] }}\n- Time: {{ $json['Time'] }}\n- Type: {{ $json['Type'] }}\n- Booking ID: {{ $json['Booking ID'] }}\n\nPlease remember to:\n- Arrive 10 minutes early\n- Bring a valid photo ID\n- Bring your insurance card if applicable\n\nNeed to cancel or reschedule? Please contact us at least 24 hours in advance at [CLINIC_PHONE].\n\nWe look forward to seeing you!\n\nWarm regards,\nThe Clinic Team\n[CLINIC_ADDRESS]",
"options": {}
},
"id": "44aaa55a-5908-4125-9182-aa1b1769fc15",
"name": "Send Reminder Email",
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1,
"position": [
416,
768
]
},
{
"parameters": {
"authentication": "oAuth2",
"select": "channel",
"channelId": {
"mode": "list",
"__rl": true,
"value": "YOUR_SLACK_CHANNEL_ID"
},
"text": "=*New Appointment Booked*\n\n*Patient:* {{ $json.patientName }}\n*Doctor:* {{ $json.doctorName }}\n*Date:* {{ $json.appointmentDate }} at {{ $json.appointmentTime }}\n*Type:* {{ $json.appointmentType }}\n*Booking ID:* {{ $json.bookingId }}\n\n_Confirmation sent to patient. Added to Google Calendar._",
"otherOptions": {}
},
"id": "483694e5-480c-42b5-9263-6dc27c2f5972",
"name": "Notify Clinic on Slack",
"type": "n8n-nodes-base.slack",
"typeVersion": 2.2,
"position": [
528,
208
]
},
{
"parameters": {
"respondWith": "json",
"responseBody": "={{ JSON.stringify({ success: true, bookingId: $json.bookingId, message: 'Appointment confirmed! Check your email for details.' }) }}",
"options": {}
},
"id": "0c445d12-6f2e-4842-bd59-238b50fcbae3",
"name": "Webhook Response",
"type": "n8n-nodes-base.respondToWebhook",
"typeVersion": 1,
"position": [
464,
48
]
}
],
"connections": {
"New Appointment Webhook": {
"main": [
[
{
"node": "Parse Booking Data",
"type": "main",
"index": 0
}
]
]
},
"Parse Booking Data": {
"main": [
[
{
"node": "Save to Appointments Sheet",
"type": "main",
"index": 0
},
{
"node": "Add to Google Calendar",
"type": "main",
"index": 0
},
{
"node": "Generate Confirmation Email",
"type": "main",
"index": 0
},
{
"node": "Notify Doctor",
"type": "main",
"index": 0
},
{
"node": "Webhook Response",
"type": "main",
"index": 0
}
]
]
},
"Add to Google Calendar": {
"main": [
[
{
"node": "Notify Clinic on Slack",
"type": "main",
"index": 0
}
]
]
},
"Generate Confirmation Email": {
"main": [
[
{
"node": "Parse Confirmation Email",
"type": "main",
"index": 0
}
]
]
},
"Groq Chat Model": {
"ai_languageModel": [
[
{
"node": "Generate Confirmation Email",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Parse Confirmation Email": {
"main": [
[
{
"node": "Send Confirmation to Patient",
"type": "main",
"index": 0
}
]
]
},
"Daily Reminder Check (8AM)": {
"main": [
[
{
"node": "Get Confirmed Appointments",
"type": "main",
"index": 0
}
]
]
},
"Get Confirmed Appointments": {
"main": [
[
{
"node": "Filter Tomorrows Appointments",
"type": "main",
"index": 0
}
]
]
},
"Filter Tomorrows Appointments": {
"main": [
[
{
"node": "Send Reminder Email",
"type": "main",
"index": 0
}
]
]
}
},
"settings": {
"executionOrder": "v1",
"binaryMode": "separate"
},
"staticData": null,
"meta": null,
"versionId": "fdfc0e5b-7add-470f-97e5-96b6b759f74e",
"activeVersionId": null,
"versionCounter": 21,
"triggerCount": 0,
"tags": [],
"shared": [
{
"updatedAt": "2026-05-22T22:07:56.127Z",
"createdAt": "2026-05-22T22:07:56.127Z",
"role": "workflow:owner",
"workflowId": "WORKFLOW_ID",
"projectId": "Iq1L14HqUAHCPUBu",
"project": {
"updatedAt": "2026-05-22T10:44:17.180Z",
"createdAt": "2026-05-22T10:43:17.263Z",
"id": "Iq1L14HqUAHCPUBu",
"name": "Hashir Wara <hasheralwara@gmail.com>",
"type": "personal",
"icon": null,
"description": null,
"creatorId": "ee0472ac-5224-40b4-a822-f71f776399c1"
}
}
],
"versionMetadata": {
"name": null,
"description": null
}
}
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About this workflow
Doctor Clinic Appointment Booking System. Uses googleSheets, googleCalendar, chainLlm, lmChatGroq. Webhook trigger; 15 nodes.
Source: https://github.com/29hashir04/n8n-workflows/blob/main/Doctor_Clinic_Appointment_Booking_System/workflow.json — original creator credit. Request a take-down →
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