This workflow follows the Agent → Google Gemini Chat 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": "2025-12-11T16:44:19.000Z",
"createdAt": "2025-10-27T18:25:38.997Z",
"id": "eQO1bX8fadDwNvMu",
"name": "call_assi",
"active": true,
"isArchived": false,
"nodes": [
{
"parameters": {
"jsCode": "const phoneNumber = $input.first().json.body.message.call?.customer?.number ?? $input.first().json.body.message.toolCalls[0].function.arguments.phoneNumber\n \nreturn {phoneNumber}"
},
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
0,
0
],
"id": "495db161-4b96-492a-9ad0-86dc38369866",
"name": "Get phone number",
"disabled": true
},
{
"parameters": {
"description": "This tool's purpose is to cancel an appointment",
"workflowId": {
"__rl": true,
"value": "qJMnBdEthjId0vbd",
"mode": "list",
"cachedResultUrl": "/workflow/qJMnBdEthjId0vbd",
"cachedResultName": "cancel_appointment"
},
"workflowInputs": {
"mappingMode": "defineBelow",
"value": {
"appointmentId": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('appointmentId', ``, 'string') }}"
},
"matchingColumns": [
"appointmentId"
],
"schema": [
{
"id": "appointmentId",
"displayName": "appointmentId",
"required": false,
"defaultMatch": false,
"display": true,
"canBeUsedToMatch": true,
"type": "string",
"removed": false
}
],
"attemptToConvertTypes": false,
"convertFieldsToString": false
}
},
"type": "@n8n/n8n-nodes-langchain.toolWorkflow",
"typeVersion": 2.2,
"position": [
528,
416
],
"id": "f39f200d-f7a5-4115-8836-4fadf45f9b4c",
"name": "cancelAppointment"
},
{
"parameters": {
"description": "This tool's purpose is to reschedule the appointment for the user",
"workflowId": {
"__rl": true,
"value": "i4ywe4sK8CvhockA",
"mode": "list",
"cachedResultUrl": "/workflow/i4ywe4sK8CvhockA",
"cachedResultName": "reschedule_appointment"
},
"workflowInputs": {
"mappingMode": "defineBelow",
"value": {
"appointmentId": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('appointmentId', ``, 'string') }}",
"appointmentDate": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('appointmentDate', ``, 'string') }}"
},
"matchingColumns": [],
"schema": [
{
"id": "appointmentId",
"displayName": "appointmentId",
"required": false,
"defaultMatch": false,
"display": true,
"canBeUsedToMatch": true,
"type": "string"
},
{
"id": "appointmentDate",
"displayName": "appointmentDate",
"required": false,
"defaultMatch": false,
"display": true,
"canBeUsedToMatch": true,
"type": "string"
}
],
"attemptToConvertTypes": false,
"convertFieldsToString": false
}
},
"type": "@n8n/n8n-nodes-langchain.toolWorkflow",
"typeVersion": 2.2,
"position": [
688,
416
],
"id": "85f58800-5a87-4328-b9d4-1410e947aee6",
"name": "rescheduleAppointment"
},
{
"parameters": {
"description": "This tool will be responsible for booking a new appointment in the calendar",
"workflowId": {
"__rl": true,
"value": "RIvTGcIIx3zSsHiZ",
"mode": "list",
"cachedResultUrl": "/workflow/RIvTGcIIx3zSsHiZ",
"cachedResultName": "bookAppointment"
},
"workflowInputs": {
"mappingMode": "defineBelow",
"value": {
"appointmentStartTime": "={{ $json.body.message.toolCallList[0].function.arguments.preferredTime }}",
"firstName": "={{ $json.body.message.toolCallList[0].function.arguments.firstName }}",
"lastName": "={{ $json.body.message.toolCallList[0].function.arguments.lastName }}",
"phoneNumber": "={{ $json.body.message.toolCallList[0].function.arguments.phoneNumber }}"
},
"matchingColumns": [],
"schema": [
{
"id": "appointmentStartTime",
"displayName": "appointmentStartTime",
"required": false,
"defaultMatch": false,
"display": true,
"canBeUsedToMatch": true,
"type": "string"
},
{
"id": "firstName",
"displayName": "firstName",
"required": false,
"defaultMatch": false,
"display": true,
"canBeUsedToMatch": true,
"type": "string"
},
{
"id": "lastName",
"displayName": "lastName",
"required": false,
"defaultMatch": false,
"display": true,
"canBeUsedToMatch": true,
"type": "string"
},
{
"id": "phoneNumber",
"displayName": "phoneNumber",
"required": false,
"defaultMatch": false,
"display": true,
"canBeUsedToMatch": true,
"type": "string"
},
{
"id": "email",
"displayName": "email",
"required": false,
"defaultMatch": false,
"display": true,
"canBeUsedToMatch": true,
"type": "string",
"removed": true
}
],
"attemptToConvertTypes": false,
"convertFieldsToString": false
}
},
"type": "@n8n/n8n-nodes-langchain.toolWorkflow",
"typeVersion": 2.2,
"position": [
848,
416
],
"id": "9c11a3ce-7d89-46d1-af88-21ec1327ef29",
"name": "bookAppointment"
},
{
"parameters": {
"promptType": "define",
"text": "=You are assisting with appointment scheduling.\n\nInput:\n- toolCallName\n- preferredTime\n- firstName\n- lastName\n- appointmentId\n- appointmentDate\n\nOutput:\nReturn only JSON specifying what action to perform, using the provided arguments. No explanation.\n",
"options": {}
},
"type": "@n8n/n8n-nodes-langchain.agent",
"typeVersion": 2,
"position": [
320,
192
],
"id": "b85bb6f9-2cbf-44e2-a765-cf5b507b1030",
"name": "AI Agent1",
"executeOnce": false
},
{
"parameters": {
"httpMethod": "POST",
"path": "e0eb2929-3f5d-48ea-ba3c-cec29f87010c",
"responseMode": "responseNode",
"options": {}
},
"type": "n8n-nodes-base.webhook",
"typeVersion": 2.1,
"position": [
-304,
176
],
"id": "cc500a08-b6fc-4f42-8664-3336608981b9",
"name": "Webhook1",
"executeOnce": false
},
{
"parameters": {
"respondWith": "json",
"responseBody": "={\n \"results\": [\n {\n \"toolCallId\": \"{{ $('Webhook1').item.json.body.message.toolCalls[0].id }}\",\n \"result\": \"{{ $json.output.replaceAll(\"\\n\", \"\").replace(/\"([^\"]+)\"/g, '\\\\\"$1\\\\\"') }}\"\n }\n ]\n}\n",
"options": {}
},
"type": "n8n-nodes-base.respondToWebhook",
"typeVersion": 1.4,
"position": [
864,
176
],
"id": "4382f5fa-8815-4d95-a1e2-62f1a5e8d887",
"name": "Respond to Webhook"
},
{
"parameters": {
"description": "This tool will check for available timeslots and return their start time",
"workflowId": {
"__rl": true,
"value": "25L7BjNxaV3gQnx0",
"mode": "list",
"cachedResultUrl": "/workflow/25L7BjNxaV3gQnx0",
"cachedResultName": "getAvailability"
},
"workflowInputs": {
"mappingMode": "defineBelow",
"value": {
"startTime": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('startTime', ``, 'string') }}",
"endTime": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('endTime', ``, 'string') }}"
},
"matchingColumns": [],
"schema": [
{
"id": "startTime",
"displayName": "startTime",
"required": false,
"defaultMatch": false,
"display": true,
"canBeUsedToMatch": true,
"type": "string"
},
{
"id": "endTime",
"displayName": "endTime",
"required": false,
"defaultMatch": false,
"display": true,
"canBeUsedToMatch": true,
"type": "string"
}
],
"attemptToConvertTypes": false,
"convertFieldsToString": false
}
},
"type": "@n8n/n8n-nodes-langchain.toolWorkflow",
"typeVersion": 2.2,
"position": [
304,
400
],
"id": "b3923ed8-896b-4a17-840c-3d985fbab81c",
"name": "getAvailability"
},
{
"parameters": {
"description": "This tool will retrieve the existing appointment for the patient",
"workflowId": {
"__rl": true,
"value": "zZLxKOn5DyLfS8Ho",
"mode": "list",
"cachedResultUrl": "/workflow/zZLxKOn5DyLfS8Ho",
"cachedResultName": "getAppointment"
},
"workflowInputs": {
"mappingMode": "defineBelow",
"value": {
"appointmentId": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('appointmentId', ``, 'string') }}"
},
"matchingColumns": [],
"schema": [
{
"id": "appointmentId",
"displayName": "appointmentId",
"required": false,
"defaultMatch": false,
"display": true,
"canBeUsedToMatch": true,
"type": "string",
"removed": false
}
],
"attemptToConvertTypes": false,
"convertFieldsToString": false
}
},
"type": "@n8n/n8n-nodes-langchain.toolWorkflow",
"typeVersion": 2.2,
"position": [
416,
400
],
"id": "a5281f99-3f80-4108-961b-c60ea8b1be9f",
"name": "getAppointment"
},
{
"parameters": {
"modelName": "models/gemini-2.0-flash-001",
"options": {}
},
"type": "@n8n/n8n-nodes-langchain.lmChatGoogleGemini",
"typeVersion": 1,
"position": [
160,
416
],
"id": "dc85af03-53d2-44cc-bfec-dd05b8508b74",
"name": "Google Gemini Chat Model",
"credentials": {
"googlePalmApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"jsCode": "// n8n Function node \u2014 \"filter + map\" for Vapi \u2192 AI Agent integration\n// Returns a compact, safe object with all the template variables your prompt expects.\n//\n// Paste this into an n8n Function node. It expects the incoming webhook JSON at $json\n// and returns one item: item.json contains the mapped fields.\n\nconst body = $json[\"body\"] || {};\nconst message = body.message || {};\n\n// Helper: find the toolCall in multiple possible places\nconst toolCall =\n (message.toolCalls && message.toolCalls[0]) ||\n (message.toolCallList && message.toolCallList[0]) ||\n (message.toolWithToolCallList && message.toolWithToolCallList[0] && message.toolWithToolCallList[0].toolCall) ||\n null;\n\n// Safe parser for possibly stringified arguments\nfunction parseArgs(raw) {\n if (!raw) return {};\n if (typeof raw === \"object\") return raw;\n if (typeof raw === \"string\") {\n try {\n return JSON.parse(raw);\n } catch (e) {\n // fallback: simple key=value pairs or raw string\n return { rawString: raw };\n }\n }\n return {};\n}\n\n// Find last user message (best-effort)\nfunction findLastUserMessage(artifact, messageFallback) {\n if (!artifact) return messageFallback || \"\";\n const msgs = artifact.messagesOpenAIFormatted || artifact.messages || [];\n for (let i = msgs.length - 1; i >= 0; i--) {\n const m = msgs[i];\n if (!m) continue;\n // support both formats: {role, content} and {role, message}\n const role = (m.role || \"\").toString().toLowerCase();\n const text = m.content || m.message || \"\";\n if (role === \"user\" || role === \"human\") return text;\n // fallback heuristics: treat any item with content and not system as user\n if (text && role && role !== \"system\" && role !== \"assistant\") return text;\n }\n return messageFallback || \"\";\n}\n\nconst args = parseArgs(toolCall && toolCall.function && toolCall.function.arguments);\nconst toolName = (toolCall && ((toolCall.function && toolCall.function.name) || toolCall.name)) || null;\n\nconst artifact = message.artifact || {};\nconst lastUserMessage = findLastUserMessage(artifact, message.text || message.message || \"\");\n\n// Heuristics for name and phone if not provided explicitly\nlet firstName = args.firstName || null;\nlet lastName = args.lastName || null;\nlet fullName = args.name || args.fullName || null;\nlet phone = args.phoneNumber || args.mobile || args.phone || null;\n\nif (!fullName && lastUserMessage) {\n const nameMatch = lastUserMessage.match(/(?:for|booking for|new booking for|book)\\s+([A-Z][a-z]+(?:\\s[A-Z][a-z]+)*)/i);\n if (nameMatch) fullName = nameMatch[1];\n}\n\nif (!phone && lastUserMessage) {\n const phoneMatch = lastUserMessage.match(/(\\+?\\d[\\d\\-\\s]{7,}\\d)/);\n if (phoneMatch) phone = phoneMatch[0].replace(/\\s+/g, \"\");\n}\n\n// split fullName into first/last if needed\nif (!firstName && fullName) {\n const parts = fullName.trim().split(/\\s+/);\n firstName = parts[0] || null;\n lastName = parts.length > 1 ? parts.slice(1).join(\" \") : (lastName || null);\n}\n\n// Map all expected template variables (keep nulls if missing)\nconst mapped = {\n toolCallName: toolName,\n firstName: firstName || null,\n lastName: lastName || null,\n preferredTime: args.preferredTime || null,\n appointmentTime: args.appointmentTime || null,\n appointmentReason: args.appointmentReason || null,\n birthDate: args.birthDate || null,\n fullName: fullName || null,\n appointmentDate: args.appointmentDate || null,\n appointmentId: args.appointmentId || null,\n lastUserMessage,\n phoneNumber: phone || null,\n chatId: (body.chat && body.chat.id) || (body.chatId || null),\n // Debugging / telemetry (optional)\n _originalSizeBytes: Buffer.from(JSON.stringify($json)).length,\n _toolCallRawId: toolCall && toolCall.id ? toolCall.id : null,\n};\n\n// Return the compact mapped object\nreturn [{ json: mapped }];\n"
},
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
-16,
192
],
"id": "c50ae0f2-a39f-4378-8ea3-f2a6a0d457bf",
"name": "Code in JavaScript"
}
],
"connections": {
"cancelAppointment": {
"ai_tool": [
[
{
"node": "AI Agent1",
"type": "ai_tool",
"index": 0
}
]
]
},
"rescheduleAppointment": {
"ai_tool": [
[
{
"node": "AI Agent1",
"type": "ai_tool",
"index": 0
}
]
]
},
"bookAppointment": {
"ai_tool": [
[
{
"node": "AI Agent1",
"type": "ai_tool",
"index": 0
}
]
]
},
"AI Agent1": {
"main": [
[
{
"node": "Respond to Webhook",
"type": "main",
"index": 0
}
]
]
},
"Webhook1": {
"main": [
[
{
"node": "Code in JavaScript",
"type": "main",
"index": 0
}
]
]
},
"getAvailability": {
"ai_tool": [
[
{
"node": "AI Agent1",
"type": "ai_tool",
"index": 0
}
]
]
},
"getAppointment": {
"ai_tool": [
[
{
"node": "AI Agent1",
"type": "ai_tool",
"index": 0
}
]
]
},
"Respond to Webhook": {
"main": [
[]
]
},
"Google Gemini Chat Model": {
"ai_languageModel": [
[
{
"node": "AI Agent1",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Code in JavaScript": {
"main": [
[
{
"node": "AI Agent1",
"type": "main",
"index": 0
}
]
]
}
},
"settings": {
"executionOrder": "v1",
"timezone": "Asia/Kolkata",
"saveExecutionProgress": true,
"callerPolicy": "workflowsFromSameOwner",
"availableInMCP": false
},
"staticData": null,
"meta": {
"templateCredsSetupCompleted": true
},
"versionId": "5541acbf-e935-40bd-afe2-3c68f9026c63",
"triggerCount": 1,
"shared": [
{
"updatedAt": "2025-10-27T18:25:39.013Z",
"createdAt": "2025-10-27T18:25:39.013Z",
"role": "workflow:owner",
"workflowId": "eQO1bX8fadDwNvMu",
"projectId": "U9gNtcfNPVWYu387"
}
],
"tags": []
}
Credentials you'll need
Each integration node will prompt for credentials when you import. We strip credential IDs before publishing — you'll add your own.
googlePalmApi
Pro
For the full experience including quality scoring and batch install features for each workflow upgrade to Pro
About this workflow
call_assi. Uses toolWorkflow, agent, lmChatGoogleGemini. Webhook trigger; 11 nodes.
Source: https://github.com/vignesh-potharaj/n8n/blob/330399d72a812fa7dadf18142cbd24ca02303fd1/workflows/call_assi.json — original creator credit. Request a take-down →
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