This workflow follows the Agent → Googlegemini 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 →
{
"active": false,
"connections": {
"WhatsApp Trigger": {
"main": [
[
{
"node": "Check Input Type",
"type": "main",
"index": 0
}
]
]
},
"Simple Memory": {
"ai_memory": [
[
{
"node": "AI Agent",
"type": "ai_memory",
"index": 0
}
]
]
},
"AI Agent": {
"main": [
[
{
"node": "If",
"type": "main",
"index": 0
}
]
]
},
"Check Input Type": {
"main": [
[
{
"node": "Get Audio URL",
"type": "main",
"index": 0
}
],
[
{
"node": "Get Image URL",
"type": "main",
"index": 0
}
],
[
{
"node": "Text Only Prompt",
"type": "main",
"index": 0
}
]
]
},
"Get Image URL": {
"main": [
[
{
"node": "Download Image",
"type": "main",
"index": 0
}
]
]
},
"Download Image": {
"main": [
[
{
"node": "Analyze Image",
"type": "main",
"index": 0
}
]
]
},
"Analyze Image": {
"main": [
[
{
"node": "Image + Text Prompt",
"type": "main",
"index": 0
}
]
]
},
"Text Only Prompt": {
"main": [
[
{
"node": "AI Agent",
"type": "main",
"index": 0
}
]
]
},
"Image + Text Prompt": {
"main": [
[
{
"node": "AI Agent",
"type": "main",
"index": 0
}
]
]
},
"Get Audio URL": {
"main": [
[
{
"node": "Download Audio",
"type": "main",
"index": 0
}
]
]
},
"Download Audio": {
"main": [
[
{
"node": "Transcribe Audio",
"type": "main",
"index": 0
}
]
]
},
"Transcribe Audio": {
"main": [
[
{
"node": "Audio Prompt",
"type": "main",
"index": 0
}
]
]
},
"Audio Prompt": {
"main": [
[
{
"node": "AI Agent",
"type": "main",
"index": 0
}
]
]
},
"If": {
"main": [
[
{
"node": "Generate Audio",
"type": "main",
"index": 0
}
],
[
{
"node": "Respond with Text",
"type": "main",
"index": 0
}
]
]
},
"Generate Audio": {
"main": [
[
{
"node": "Fix Mime Type",
"type": "main",
"index": 0
}
]
]
},
"Fix Mime Type": {
"main": [
[
{
"node": "Respond with Audio",
"type": "main",
"index": 0
}
]
]
},
"Web Search": {
"ai_tool": [
[
{
"node": "AI Agent",
"type": "ai_tool",
"index": 0
}
]
]
},
"OpenAI Chat Model": {
"ai_languageModel": [
[
{
"node": "AI Agent",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Calculator": {
"ai_tool": [
[
{
"node": "AI Agent",
"type": "ai_tool",
"index": 0
}
]
]
},
"Embeddings OpenAI": {
"ai_embedding": [
[
{
"node": "Knowledge Base",
"type": "ai_embedding",
"index": 0
}
]
]
},
"Knowledge Base": {
"ai_tool": [
[
{
"node": "AI Agent",
"type": "ai_tool",
"index": 0
}
]
]
},
"MCP Client": {
"ai_tool": [
[
{
"node": "AI Agent",
"type": "ai_tool",
"index": 0
}
]
]
}
},
"createdAt": "2025-08-20T10:27:22.719Z",
"id": "sF2KZePkUepXP86t",
"isArchived": false,
"meta": null,
"name": "Whatsapp",
"nodes": [
{
"parameters": {
"updates": [
"messages"
],
"options": {}
},
"type": "n8n-nodes-base.whatsAppTrigger",
"typeVersion": 1,
"position": [
-400,
512
],
"id": "27395a95-be47-4e95-9024-4112bbe32de5",
"name": "WhatsApp Trigger"
},
{
"parameters": {
"promptType": "define",
"text": "={{ $json.text }}",
"options": {
"systemMessage": "=You are a helpful assistant called Sam.\n\nYou are currently talking to {{ $('WhatsApp Trigger').item.json.contacts[0].profile.name }}\n\nThe current date and time is {{ $now.toString() }}"
}
},
"type": "@n8n/n8n-nodes-langchain.agent",
"typeVersion": 1.9,
"position": [
272,
624
],
"id": "f3c52847-025e-4952-a850-78aa8e9b3690",
"name": "AI Agent"
},
{
"parameters": {
"sessionIdType": "customKey",
"sessionKey": "={{ $('WhatsApp Trigger').item.json.messages[0].from }}",
"contextWindowLength": 20
},
"type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
"typeVersion": 1.3,
"position": [
192,
832
],
"id": "5ec2ef3f-203c-4ac4-b3c6-3ca030130482",
"name": "Simple Memory"
},
{
"parameters": {
"rules": {
"values": [
{
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 2
},
"conditions": [
{
"id": "b7b64446-f1ea-4622-990c-22f3999a8269",
"leftValue": "={{ $json.messages[0].audio }}",
"rightValue": "",
"operator": {
"type": "object",
"operation": "exists",
"singleValue": true
}
}
],
"combinator": "and"
},
"renameOutput": true,
"outputKey": "Voice"
},
{
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 2
},
"conditions": [
{
"id": "202af928-a324-411a-bf15-68a349e7bf9e",
"leftValue": "={{ $json.messages[0].image }}",
"rightValue": "",
"operator": {
"type": "object",
"operation": "exists",
"singleValue": true
}
}
],
"combinator": "and"
},
"renameOutput": true,
"outputKey": "Image"
},
{
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 2
},
"conditions": [
{
"leftValue": "={{ $json.messages[0].text.body }}",
"rightValue": "",
"operator": {
"type": "string",
"operation": "exists",
"singleValue": true
},
"id": "08fd0c80-307e-4f45-b1de-35192ee4ec5e"
}
],
"combinator": "and"
},
"renameOutput": true,
"outputKey": "Text"
}
]
},
"options": {}
},
"type": "n8n-nodes-base.switch",
"typeVersion": 3.2,
"position": [
-224,
512
],
"id": "4900fdf4-c662-4e45-9e78-9b3c38b1c9a4",
"name": "Check Input Type"
},
{
"parameters": {
"resource": "media",
"operation": "mediaUrlGet",
"mediaGetId": "={{ $('WhatsApp Trigger').item.json.messages[0].image.id }}"
},
"type": "n8n-nodes-base.whatsApp",
"typeVersion": 1,
"position": [
128,
352
],
"id": "77c90743-f5af-4a5f-ba9c-c0134ee42fb5",
"name": "Get Image URL"
},
{
"parameters": {
"url": "={{ $json.url }}",
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"options": {}
},
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
288,
352
],
"id": "a0dbd2df-ee29-4529-a1a1-56df2337d8d6",
"name": "Download Image"
},
{
"parameters": {
"resource": "image",
"operation": "analyze",
"modelId": {
"__rl": true,
"value": "chatgpt-4o-latest",
"mode": "list",
"cachedResultName": "CHATGPT-4O-LATEST"
},
"text": "=Describe the image in detail.",
"inputType": "base64",
"options": {}
},
"type": "@n8n/n8n-nodes-langchain.openAi",
"typeVersion": 1.8,
"position": [
448,
352
],
"id": "ab03db3b-1e44-4189-9b14-042de1349014",
"name": "Analyze Image",
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"assignments": {
"assignments": [
{
"id": "67552183-de2e-494a-878e-c2948e8cb6bb",
"name": "text",
"value": "=# The user provided the following image and text.\n\n## IMAGE CONTENT:\n{{ $json.content }}\n\n## USER MESSAGE:\n{{ $('WhatsApp Trigger').item.json.messages[0].image.caption || \"Describe the image\" }}",
"type": "string"
}
]
},
"options": {}
},
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
608,
352
],
"id": "726edd9d-cfd1-4038-9fd6-d50978f5f238",
"name": "Image + Text Prompt"
},
{
"parameters": {
"assignments": {
"assignments": [
{
"id": "c05a7fbf-309a-407e-9fee-7e0b03f4a5c8",
"name": "text",
"value": "={{ $('WhatsApp Trigger').item.json.messages[0].text.body }}",
"type": "string"
}
]
},
"options": {}
},
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
48,
624
],
"id": "5ce9e117-7a53-4879-8452-cec48ae4a910",
"name": "Text Only Prompt"
},
{
"parameters": {
"resource": "media",
"operation": "mediaUrlGet",
"mediaGetId": "={{ $('WhatsApp Trigger').item.json.messages[0].audio.id }}"
},
"type": "n8n-nodes-base.whatsApp",
"typeVersion": 1,
"position": [
128,
80
],
"id": "6d88ffa5-e7d1-4093-b5e8-8c2ff2db69fc",
"name": "Get Audio URL"
},
{
"parameters": {
"url": "={{ $json.url }}",
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"options": {}
},
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
288,
80
],
"id": "91b62a6f-f1d7-4f90-a098-335a1e1599d1",
"name": "Download Audio"
},
{
"parameters": {
"resource": "audio",
"operation": "transcribe",
"options": {}
},
"type": "@n8n/n8n-nodes-langchain.openAi",
"typeVersion": 1.8,
"position": [
448,
80
],
"id": "68061239-0cf2-4ad1-b85e-51eafcc6e4c1",
"name": "Transcribe Audio",
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"assignments": {
"assignments": [
{
"id": "219577d5-b028-48fc-90be-980f4171ab68",
"name": "text",
"value": "={{ $json.text }}",
"type": "string"
}
]
},
"options": {}
},
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
608,
80
],
"id": "506ca19a-0d2a-420a-a982-2055868c4503",
"name": "Audio Prompt"
},
{
"parameters": {
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 2
},
"conditions": [
{
"id": "b9d1d759-f585-4791-a743-b9d72951e77c",
"leftValue": "={{ $('WhatsApp Trigger').item.json.messages[0].audio }}",
"rightValue": "",
"operator": {
"type": "object",
"operation": "exists",
"singleValue": true
}
}
],
"combinator": "and"
},
"options": {}
},
"type": "n8n-nodes-base.if",
"typeVersion": 2.2,
"position": [
608,
624
],
"id": "35af8e3e-a89f-49ef-855d-e5b4d9380556",
"name": "If"
},
{
"parameters": {
"resource": "audio",
"input": "={{ $('AI Agent').item.json.output }}",
"options": {}
},
"type": "@n8n/n8n-nodes-langchain.openAi",
"typeVersion": 1.8,
"position": [
944,
608
],
"id": "156ad742-7bd0-49b3-84fc-323b47185eda",
"name": "Generate Audio",
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"operation": "send",
"phoneNumberId": "175940715605000",
"recipientPhoneNumber": "={{ $('Check Input Type').item.json.contacts[0].wa_id }}",
"messageType": "audio",
"mediaPath": "useMedian8n",
"additionalFields": {}
},
"type": "n8n-nodes-base.whatsApp",
"typeVersion": 1,
"position": [
1312,
608
],
"id": "a2e2165e-a2ec-45b7-996b-253df04e866f",
"name": "Respond with Audio"
},
{
"parameters": {
"operation": "send",
"phoneNumberId": "175940715605000",
"recipientPhoneNumber": "={{ $('WhatsApp Trigger').item.json.messages[0].from }}",
"textBody": "={{ $json.output }}",
"additionalFields": {}
},
"type": "n8n-nodes-base.whatsApp",
"typeVersion": 1,
"position": [
944,
800
],
"id": "77786567-becc-4f26-8bad-4f9b958bc91f",
"name": "Respond with Text"
},
{
"parameters": {
"jsCode": "// Loop over input items and change the MIME type of binary data\nfor (const item of $input.all()) {\n // Check if the item has binary data\n if (item.binary) {\n // Find the binary property name (assuming there's at least one)\n const binaryPropertyNames = Object.keys(item.binary);\n \n for (const propName of binaryPropertyNames) {\n // If the MIME type is 'audio/mp3', change it to 'audio/mpeg'\n if (item.binary[propName].mimeType === 'audio/mp3') {\n item.binary[propName].mimeType = 'audio/mpeg';\n }\n }\n }\n}\n\nreturn $input.all();"
},
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
1120,
608
],
"id": "3e4f42a4-7a1e-4c33-b57c-aa678b502246",
"name": "Fix Mime Type"
},
{
"parameters": {
"content": "## Audio",
"height": 240,
"width": 800
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
0,
0
],
"id": "f1abfba7-d5a1-478a-ae4c-027e07f65c14",
"name": "Sticky Note"
},
{
"parameters": {
"content": "## Image & Text",
"height": 280,
"width": 800,
"color": 4
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
0,
272
],
"id": "12c8dc74-1faf-4e45-9a8c-cee975ab7816",
"name": "Sticky Note1"
},
{
"parameters": {
"content": "## Tools",
"height": 400,
"width": 820
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
-16,
1040
],
"id": "11b8cbd2-00b7-4864-8ffc-d29355fd6ef9",
"name": "Sticky Note2"
},
{
"parameters": {
"options": {}
},
"type": "@n8n/n8n-nodes-langchain.toolSerpApi",
"typeVersion": 1,
"position": [
32,
1152
],
"id": "48b11a6c-9daa-4e48-9553-ae8dae5fdf83",
"name": "Web Search"
},
{
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "gpt-4o-mini"
},
"options": {}
},
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"typeVersion": 1.2,
"position": [
48,
832
],
"id": "2e1f2430-4b4b-410a-aa22-3bfe1b7bf314",
"name": "OpenAI Chat Model",
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {},
"type": "@n8n/n8n-nodes-langchain.toolCalculator",
"typeVersion": 1,
"position": [
128,
1152
],
"id": "bdf23a44-9307-408b-9b1b-95ed61f11ed0",
"name": "Calculator"
},
{
"parameters": {
"options": {}
},
"type": "@n8n/n8n-nodes-langchain.embeddingsOpenAi",
"typeVersion": 1.2,
"position": [
240,
1280
],
"id": "6737f3e8-33bf-446a-8663-78fb00a15006",
"name": "Embeddings OpenAI"
},
{
"parameters": {
"mode": "retrieve-as-tool",
"toolName": "contacts",
"toolDescription": "Returns contact information like email addresses.",
"pineconeIndex": {
"__rl": true,
"value": "n8n",
"mode": "list",
"cachedResultName": "n8n"
},
"options": {
"pineconeNamespace": "contacts"
}
},
"type": "@n8n/n8n-nodes-langchain.vectorStorePinecone",
"typeVersion": 1.1,
"position": [
224,
1152
],
"id": "d973ffb8-0f31-4b99-bf71-e9be756b0105",
"name": "Knowledge Base"
},
{
"parameters": {
"sseEndpoint": "https://n8n.leonvanzyl.com/mcp/mytools/sse"
},
"type": "@n8n/n8n-nodes-langchain.mcpClientTool",
"typeVersion": 1,
"position": [
528,
1152
],
"id": "d031b7ec-f7c6-4947-9b86-af40601cc926",
"name": "MCP Client"
}
],
"settings": {
"executionOrder": "v1"
},
"staticData": null,
"tags": [],
"triggerCount": 0,
"updatedAt": "2025-08-20T10:27:45.000Z",
"versionId": "868e6e1c-651c-4a1b-94e5-dedefae8d962"
}
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.
googleApigooglePalmApipostgres
Pro
For the full experience including quality scoring and batch install features for each workflow upgrade to Pro
How this works
This workflow enables seamless, intelligent conversations via WhatsApp, allowing businesses to automate customer support and engagement without manual intervention. It responds to incoming messages with context-aware replies powered by Google Vertex AI, ensuring personalised interactions that boost satisfaction and efficiency. Ideal for small teams or e-commerce owners handling frequent queries, the key step involves the AI agent analysing message content to generate structured, relevant responses before sending them back through the Z-API integration.
Use this workflow for moderate-volume WhatsApp channels needing quick, AI-driven replies, such as product inquiries or booking confirmations, especially when integrating with PostgreSQL for chat history. Avoid it for high-security applications requiring on-premise processing or non-text media handling, as it focuses on textual dialogues. Common variations include swapping Google Vertex for another LLM or adding sentiment analysis nodes for escalated support.
About this workflow
Whatsapp. Uses memoryManager, lmChatGoogleVertex, outputParserStructured, agent. Webhook trigger; 19 nodes.
Source: https://github.com/joziel99/hackathon-dev-de-impacto-ajud-ia/blob/bd6216c07b6dbea83e65ce1aaa8f6d9d1c47f840/n8n/n8n-Whatsapp.json — original creator credit. Request a take-down →
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