GHL Features Not Activating

Questions
1

“name”: “book appointment - GHL version”,
“nodes”: [
{
“parameters”: {
“httpMethod”: “POST”,
“path”: “d0522c57-4059-4887-a83b-5e0c71a5b0e3”,
“responseMode”: “responseNode”,
“options”: {}
},
“type”: “n8n-nodes-base.webhook”,
“typeVersion”: 2.1,
“position”: [-96, -48],
“id”: “925be49b-d7e2-4c78-af30-c5c9dc6f66aa”,
“name”: “Webhook”,
“webhookId”: “d0522c57-4059-4887-a83b-5e0c71a5b0e3”
},
{
“parameters”: {
“promptType”: “define”,
“text”: “=You are a booking AI Agent for GoHighLevel. Your job is to:\n​:one: Get customer details (name, email, phone, time, service type)\n​:two: Use the ‘Create Contact in GHL’ tool to make sure the contact exists (upsert by email).\n​:three: Use the ‘Book Appointment in GHL’ tool to schedule the appointment using the contactId from the previous step.\n\nAppointment start: {{ $json.body.args.time }}\nDuration: 60 minutes (add one hour for end time).\n\nAfter booking, use the ‘Send Confirmation Email’ tool to confirm to the client.\n\nOutput format example:\n"Hey {{ $json.body.args.name }}, your {{ $json.body.args.service_type }} appointment on {{ $json.body.args.time }} has been booked! We’ll see you then."”,
“options”: {}
},
“type”: “@n8n/n8n-nodes-langchain.agent”,
“typeVersion”: 2.2,
“position”: [240, -64],
“id”: “23858562-9041-43f9-b4a7-810e8dd2b0fc”,
“name”: “AI Agent”
},
{
“parameters”: {
“model”: {
“__rl”: true,
“mode”: “list”,
“value”: “gpt-4.1-mini”
},
“options”: {}
},
“type”: “@n8n/n8n-nodes-langchain.lmChatOpenAi”,
“typeVersion”: 1.2,
“position”: [16, 176],
“id”: “913c7ea7-62f3-419a-af8e-702ad7d629f3”,
“name”: “OpenAI Chat Model”,
“credentials”: {
“openAiApi”: {
“id”: “786gnhIuud1dHep1”,
“name”: “OpenAi account 3”
}
}
},
{
“parameters”: {
“operation”: “create”,
“additionalFields”: {
“email”: “=”{{ $json.body.args.email }}
“firstName”: “={{ $json.body.args.name }}”,
“phone”: “={{ $json.body.args.name }}”
“sessionId”: {{ $json.sessionId }}
}
},
“type”: “n8n-nodes-base.highLevel”,
“typeVersion”: 1,
“position”: [240, 160],
“id”: “create-contact-ghl”,
“name”: “Create Contact in GHL”,
“credentials”: {
“highLevelApi”: {
“id”: “your-ghl-credential-id”,
“name”: “GoHighLevel account”
}
}
},
{
“parameters”: {
“operation”: “bookAppointment”,
“calendarId”: “YOUR_CALENDAR_ID”,
“locationId”: “YOUR_LOCATION_ID”,
“contactId”: “={{ $json.id }}”,
“startTime”: “={{ $json.body.args.time }}”,
“endTime”: “={{ new Date(new Date($json.body.args.time).getTime() + 60601000).toISOString() }}”,
“additionalFields”: {
“assignedUserId”: “”,
“title”: “={{ $json.body.args.service_type }} Appointment with {{ $json.body.args.name }}”
}
},
“type”: “n8n-nodes-base.highLevel”,
“typeVersion”: 1,
“position”: [480, 160],
“id”: “book-appointment-ghl”,
“name”: “Book Appointment in GHL”,
“credentials”: {
“highLevelApi”: {
“id”: “your-ghl-credential-id”,
“name”: “GoHighLevel account”
}
}
},
{
“parameters”: {
“sendTo”: “={{ $json.body.args.email }}”,
“subject”: “=Your appointment confirmation with Glow Spa Clinic”,
“emailType”: “text”,
“message”: “=Hello {{ $json.body.args.name }},\n\nThis is a confirmation that your {{ $json.body.args.service_type }} appointment is booked for {{ $json.body.args.time }}.\n\nWe look forward to seeing you soon!\n\nGlow Spa Clinic”
},
“type”: “n8n-nodes-base.gmailTool”,
“typeVersion”: 2.1,
“position”: [720, 160],
“id”: “send-confirmation-email”,
“name”: “Send Confirmation Email”,
“credentials”: {
“gmailOAuth2”: {
“id”: “56QuCItIyVZDzh6H”,
“name”: “Gmail account”
}
}
},
{
“parameters”: {},
“type”: “n8n-nodes-base.respondToWebhook”,
“typeVersion”: 1.4,
“position”: [960, -64],
“id”: “respond-webhook”,
“name”: “Respond to Webhook”
}
],
“connections”: {
“Webhook”: {
“main”: [[{ “node”: “AI Agent”, “type”: “main”, “index”: 0 }]]
},
“OpenAI Chat Model”: {
“ai_languageModel”: [[{ “node”: “AI Agent”, “type”: “ai_languageModel”, “index”: 0 }]]
},
“AI Agent”: {
“main”: [[{ “node”: “Create Contact in GHL”, “type”: “main”, “index”: 0 }]]
},
“Create Contact in GHL”: {
“main”: [[{ “node”: “Book Appointment in GHL”, “type”: “main”, “index”: 0 }]]
},
“Book Appointment in GHL”: {
“main”: [[{ “node”: “Send Confirmation Email”, “type”: “main”, “index”: 0 }]]
},
“Send Confirmation Email”: {
“main”: [[{ “node”: “Respond to Webhook”, “type”: “main”, “index”: 0 }]]
}
},
“active”: true,
“settings”: {
“executionOrder”: “v1”
},
“versionId”: “ghl-version-2025-10-31”
}

Describe the problem/error/question

What is the error message (if any)?

Please share your workflow

(Select the nodes on your canvas and use the keyboard shortcuts CMD+C/CTRL+C and CMD+V/CTRL+V to copy and paste the workflow.)

Share the output returned by the last node

Information on your n8n setup

  • n8n version:
  • Database (default: SQLite):
  • n8n EXECUTIONS_PROCESS setting (default: own, main):
  • Running n8n via (Docker, npm, n8n cloud, desktop app):
  • Operating system:
3

Looking at your workflow, it seems like you’re trying to create an AI agent that books appointments in GoHighLevel, but your workflow appears incomplete. Based on the search results from [community.n8n.io]( Issue Creating GoHighLevel Contacts Using n8n HTTP Request API ), many users face authentication issues with GHL API calls.

Here are the key steps to fix this:

• **Complete your workflow**: Your JSON shows only the webhook, AI agent, and OpenAI model nodes, but you’re missing the actual GHL tools/nodes that the AI agent references (“Create Contact in GHL” and “Book Appointment in GHL”)

• **Add proper GHL nodes**: Connect HTTP Request nodes or use the dedicated GoHighLevel node for creating contacts and booking appointments, ensuring proper authentication with your GHL API credentials

• **Test authentication first**: Before building the full automation, test a simple GHL contact creation using the HTTP Request node to verify your API credentials work correctly

• **Connect the tools**: Make sure your AI agent has access to the GHL tools by properly connecting them as sub-nodes in the agent configuration

Would you be able to share the complete workflow so I can see what specific GHL integration nodes you’re using?