Juan Carlos Cavero Gracia 
This workflow corresponds to n8n.io template #3016 — we link there as the canonical source.
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 →
{
"id": "XnGZZfT5u0Cw1X3p",
"meta": {
"templateCredsSetupCompleted": true
},
"name": "Attachments Gmail to drive and google sheets",
"tags": [],
"nodes": [
{
"id": "0404ef0a-9750-495a-8798-98d4b059a083",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
-580,
-420
],
"parameters": {
"height": 440,
"content": "## Setup\n1. Setup your **Gmail** and **Google Drive** credentials\n2. Setup your **Google Sheets** credentials\n3. Setup your **Openai** api key"
},
"typeVersion": 1
},
{
"id": "8751a7f1-aae4-4746-aae7-3d8563845b8c",
"name": "Gmail Trigger1",
"type": "n8n-nodes-base.gmailTrigger",
"position": [
-640,
120
],
"parameters": {
"simple": false,
"filters": {
"readStatus": "unread"
},
"options": {
"downloadAttachments": true
},
"pollTimes": {
"item": [
{
"mode": "everyMinute"
}
]
}
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 1.1
},
{
"id": "40f62192-5acb-4915-aa07-e5a0dfeb7581",
"name": "Setup1",
"type": "n8n-nodes-base.set",
"position": [
-300,
120
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "4cca07a2-6a70-4011-a025-65246e652fb9",
"name": "url_to_drive_folder",
"type": "string",
"value": "1fCWCdqrFP3WrjjLc-gJtxMaiaF5lh8Ko"
}
]
},
"includeOtherFields": true
},
"typeVersion": 3.4
},
{
"id": "d928e797-8851-4ab4-9199-cd555a40eae9",
"name": "Upload PDF to Drive1",
"type": "n8n-nodes-base.httpRequest",
"maxTries": 5,
"position": [
220,
0
],
"parameters": {
"url": "https://www.googleapis.com/upload/drive/v3/files",
"method": "POST",
"options": {},
"sendBody": true,
"sendQuery": true,
"contentType": "binaryData",
"authentication": "predefinedCredentialType",
"queryParameters": {
"parameters": [
{
"name": "uploadType",
"value": "media"
}
]
},
"inputDataFieldName": "={{ $binary.attachment_0.mimeType === \"application/pdf\"\n ? \"attachment_0\"\n : \"attachment_1\" }}",
"nodeCredentialType": "googleDriveOAuth2Api"
},
"credentials": {
"googleDriveOAuth2Api": {
"name": "<your credential>"
}
},
"retryOnFail": true,
"typeVersion": 4.2
},
{
"id": "22df6933-a0c7-4cce-8114-5332038a14c3",
"name": "Rename file1",
"type": "n8n-nodes-base.googleDrive",
"position": [
400,
0
],
"parameters": {
"fileId": {
"__rl": true,
"mode": "id",
"value": "={{ $json.id }}"
},
"options": {},
"operation": "update",
"newUpdatedFileName": "={{ $('Setup1').item.json.subject }}_invoice_{{ $now.format('yyyy-MM-dd') }}.pdf"
},
"credentials": {
"googleDriveOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 3
},
{
"id": "ce6a6a4c-17ba-4cf7-b07a-97b9d8d80844",
"name": "Move to the correct folder1",
"type": "n8n-nodes-base.googleDrive",
"position": [
580,
0
],
"parameters": {
"fileId": {
"__rl": true,
"mode": "id",
"value": "={{ $json.id }}"
},
"driveId": {
"__rl": true,
"mode": "list",
"value": "My Drive",
"cachedResultUrl": "https://drive.google.com/drive/my-drive",
"cachedResultName": "My Drive"
},
"folderId": {
"__rl": true,
"mode": "list",
"value": "1fCWCdqrFP3WrjjLc-gJtxMaiaF5lh8Ko",
"cachedResultUrl": "",
"cachedResultName": "2025"
},
"operation": "move"
},
"credentials": {
"googleDriveOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 3
},
{
"id": "e64aac5c-a314-46b6-b7db-fc0d6f450e1f",
"name": "Gmail",
"type": "n8n-nodes-base.gmail",
"position": [
1240,
0
],
"parameters": {
"messageId": "={{ $('Gmail Trigger1').item.json.id }}",
"operation": "markAsRead"
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 2.1
},
{
"id": "ea74cfc1-0305-418d-9f5f-bffcfb3bb2c7",
"name": "Extract from File2",
"type": "n8n-nodes-base.extractFromFile",
"position": [
1200,
-180
],
"parameters": {
"options": {},
"operation": "pdf"
},
"typeVersion": 1
},
{
"id": "0398d982-78fd-4830-b5cf-271195af80fd",
"name": "Google Drive",
"type": "n8n-nodes-base.googleDrive",
"position": [
800,
0
],
"parameters": {
"fileId": {
"__rl": true,
"mode": "id",
"value": "={{ $json.id }}"
},
"options": {},
"operation": "download"
},
"credentials": {
"googleDriveOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 3
},
{
"id": "3b4a96d4-a6ee-486a-a795-fe410ccc38b2",
"name": "OpenAI Model",
"type": "@n8n/n8n-nodes-langchain.lmOpenAi",
"position": [
1740,
20
],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "gpt-4o",
"cachedResultName": "gpt-4o"
},
"options": {
"temperature": 0
}
},
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
},
"typeVersion": 1
},
{
"id": "a7dd0d95-5e79-4bd2-a8a6-2178264d19fc",
"name": "Structured Output Parser",
"type": "@n8n/n8n-nodes-langchain.outputParserStructured",
"position": [
1940,
40
],
"parameters": {
"jsonSchema": "{\n \"Invoice date\": { \"type\": \"date\" },\n \"Invoice description\": { \"type\": \"string\" },\n \"Total price\": { \"type\": \"number\" },\n \"Fichero\": { \"type\": \"string\" }\n}"
},
"typeVersion": 1.1
},
{
"id": "68d98f4c-e679-48e3-a1a1-529cda4e31a4",
"name": "Append to Reconciliation Sheet",
"type": "n8n-nodes-base.googleSheets",
"position": [
2280,
-140
],
"parameters": {
"columns": {
"value": {},
"schema": [
{
"id": "Invoice date",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "Invoice date",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Invoice Description",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "Invoice Description",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Total price",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "Total price",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Fichero",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "Fichero",
"defaultMatch": false,
"canBeUsedToMatch": true
}
],
"mappingMode": "autoMapInputData",
"matchingColumns": [],
"attemptToConvertTypes": false,
"convertFieldsToString": false
},
"options": {},
"operation": "append",
"sheetName": {
"__rl": true,
"mode": "id",
"value": "gid=0"
},
"documentId": {
"__rl": true,
"mode": "list",
"value": "1gIUnjSWUhsoTOVVd4ZoVjARCGQfGE8s7FWcju3lNajM",
"cachedResultUrl": "",
"cachedResultName": "facturas"
}
},
"credentials": {
"googleSheetsOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 4.3
},
{
"id": "80e1c8f4-b593-4c5f-b9e2-f3b7996ee6d4",
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"position": [
1680,
-400
],
"parameters": {
"color": 7,
"width": 805.0578351924228,
"height": 656.5014186128178,
"content": "## 3. Use LLMs to Extract Values from Data\n[Read more about Basic LLM Chain](https://docs.n8n.io/integrations/builtin/cluster-nodes/root-nodes/n8n-nodes-langchain.chainllm/)\n\nLarge language models are perfect for data extraction tasks as they can work across a range of document layouts without human intervention. The extracted data can then be sent to a variety of datastores such as spreadsheets, accounting systems and/or CRMs.\n\n**Tip:** The \"Structured Output Parser\" ensures the AI output can be\ninserted to our spreadsheet without additional clean up and/or formatting. "
},
"typeVersion": 1
},
{
"id": "3754e10e-a233-4ce0-bc79-bb5c01db9695",
"name": "Map Output",
"type": "n8n-nodes-base.set",
"position": [
2080,
-140
],
"parameters": {
"mode": "raw",
"options": {},
"jsonOutput": "={{ $json.output }}"
},
"typeVersion": 3.3
},
{
"id": "a42ff16f-d0df-4b6d-9a36-849f85d1facc",
"name": "Apply Data Extraction Rules",
"type": "@n8n/n8n-nodes-langchain.chainLlm",
"position": [
1740,
-140
],
"parameters": {
"text": "=Given the following invoice in the <invoice> xml tags, extract the following information as listed below.\nIf you cannot the information for a specific item, then leave blank and skip to the next. \n\n* Invoice date\n* Invoice Description: {{ $('Rename file1').item.json.name }}\n* Total price\n* Fichero: =HYPERLINK(\"https://drive.google.com/file/d/{{ $('Move to the correct folder1').item.json.id }}/view\", \"Ver Documento\")\n\n\n<invoice>{{ $json.text }}</invoice>",
"promptType": "define",
"hasOutputParser": true
},
"typeVersion": 1.4
},
{
"id": "f6de5d5a-d2dc-4590-8f46-3f250b8fca9f",
"name": "Sticky Note6",
"type": "n8n-nodes-base.stickyNote",
"position": [
1860,
0
],
"parameters": {
"width": 192.26896179623753,
"height": 213.73043662572252,
"content": "\n\n\n\n\n\n\n\n\n\n\n\n**Need more attributes?**\nChange it here!"
},
"typeVersion": 1
},
{
"id": "255fe8c1-5bd7-41cc-b1f9-c8956b5ad101",
"name": "Only invoice mails with attachments",
"type": "n8n-nodes-base.if",
"position": [
0,
120
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 1,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "or",
"conditions": [
{
"id": "229200d1-ec13-4970-ae0e-2c8e17da0bdf",
"operator": {
"type": "string",
"operation": "contains"
},
"leftValue": "={{ $('Gmail Trigger1').item.json.headers['content-type'] }}",
"rightValue": "multipart/mixed"
},
{
"id": "new-condition",
"operator": {
"type": "boolean",
"operation": "isNotEmpty"
},
"leftValue": "={{ $json.attachments }}"
}
]
}
},
"typeVersion": 2.1
}
],
"active": true,
"settings": {
"executionOrder": "v1"
},
"versionId": "eb152808-e993-4e18-9dd8-10f21df57bf1",
"connections": {
"Gmail": {
"main": [
[]
]
},
"Setup1": {
"main": [
[
{
"node": "Only invoice mails with attachments",
"type": "main",
"index": 0
}
]
]
},
"Map Output": {
"main": [
[
{
"node": "Append to Reconciliation Sheet",
"type": "main",
"index": 0
}
]
]
},
"Google Drive": {
"main": [
[
{
"node": "Extract from File2",
"type": "main",
"index": 0
}
]
]
},
"OpenAI Model": {
"ai_languageModel": [
[
{
"node": "Apply Data Extraction Rules",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Rename file1": {
"main": [
[
{
"node": "Move to the correct folder1",
"type": "main",
"index": 0
}
]
]
},
"Gmail Trigger1": {
"main": [
[
{
"node": "Setup1",
"type": "main",
"index": 0
}
]
]
},
"Extract from File2": {
"main": [
[
{
"node": "Apply Data Extraction Rules",
"type": "main",
"index": 0
}
]
]
},
"Upload PDF to Drive1": {
"main": [
[
{
"node": "Rename file1",
"type": "main",
"index": 0
}
]
]
},
"Structured Output Parser": {
"ai_outputParser": [
[
{
"node": "Apply Data Extraction Rules",
"type": "ai_outputParser",
"index": 0
}
]
]
},
"Apply Data Extraction Rules": {
"main": [
[
{
"node": "Map Output",
"type": "main",
"index": 0
}
]
]
},
"Move to the correct folder1": {
"main": [
[
{
"node": "Gmail",
"type": "main",
"index": 0
},
{
"node": "Google Drive",
"type": "main",
"index": 0
}
]
]
},
"Only invoice mails with attachments": {
"main": [
[
{
"node": "Upload PDF to Drive1",
"type": "main",
"index": 0
}
],
[
{
"node": "Gmail",
"type": "main",
"index": 0
}
]
]
}
}
}
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.
gmailOAuth2googleDriveOAuth2ApigoogleSheetsOAuth2ApiopenAiApi
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About this workflow
Automatically process invoice emails by saving attachments to Google Drive and extracting key invoice data to Google Sheets using AI. This workflow monitors your Gmail for unread emails with attachments, saves PDFs to a specified Google Drive folder, and uses OpenAI's GPT-4o to…
Source: https://n8n.io/workflows/3016/ — original creator credit. Request a take-down →
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