This workflow follows the Agent → Form Trigger 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 →
{
"meta": {
"templateCredsSetupCompleted": true
},
"nodes": [
{
"id": "32dec238-615e-461d-ac9b-e09bdcb2a73f",
"name": "OpenAI Chat Model",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
560,
200
],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "gpt-4o-mini"
},
"options": {}
},
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
},
"typeVersion": 1.2
},
{
"id": "4cb973bc-385f-42db-b79e-942c75d97a84",
"name": "Structured Output Parser",
"type": "@n8n/n8n-nodes-langchain.outputParserStructured",
"position": [
780,
200
],
"parameters": {
"jsonSchemaExample": "{\n \"invoice_number\": \"\",\n \"invoice_date\": \"\",\n \"due_date\": \"\",\n \"vendor_name\": \"\",\n \"total_amount\": \"\",\n \"currency\": \"\",\n \"items\": [\n {\n \"description\": \"\",\n \"amount\": \"\"\n }\n ],\n \"tax\": \"\",\n \"category\": \"\"\n}"
},
"typeVersion": 1.2
},
{
"id": "b7ed6cf6-e965-43e0-abab-919ab598e62a",
"name": "Invoice Folder Monitor",
"type": "n8n-nodes-base.googleDriveTrigger",
"position": [
-100,
-220
],
"parameters": {
"event": "fileCreated",
"options": {},
"pollTimes": {
"item": [
{
"mode": "everyMinute"
}
]
},
"triggerOn": "specificFolder",
"folderToWatch": {
"__rl": true,
"mode": "id",
"value": "1KJ4fvXcKVMGJunsKvPYf8PkX5K9SVwFk"
}
},
"credentials": {
"googleDriveOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 1
},
{
"id": "d2a0d543-1ee3-4852-9751-69aae3b9864a",
"name": "Download Invoice PDF",
"type": "n8n-nodes-base.googleDrive",
"position": [
100,
-220
],
"parameters": {
"fileId": {
"__rl": true,
"mode": "id",
"value": "={{ $json.id }}"
},
"options": {},
"operation": "download"
},
"credentials": {
"googleDriveOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 3
},
{
"id": "80345f83-02fa-47ab-86f0-1e01bd3429e7",
"name": "Invoice Parser AI Agent",
"type": "@n8n/n8n-nodes-langchain.agent",
"position": [
580,
0
],
"parameters": {
"text": "=You are an intelligent invoice parser. I will give you raw text extracted from a PDF invoice. \n\n========================\nSTART OF RAW INVOICE TEXT\n\n{{ $json.text }}\n\nEND OF RAW INVOICE TEXT\n========================\n\nYour job is to:\n\n1. Extract key information from the invoice such as:\n - invoice_number\n - invoice_date\n - due_date (if available)\n - vendor_name\n - total_amount\n - currency (e.g., USD, IDR, etc.)\n - items (as a list of item descriptions and their amounts)\n - tax (if available)\n\n2. Detect the invoice **category**, such as:\n - Utilities\n - Office Supplies\n - Travel\n - Software\n - Food & Beverage\n - Others (if unknown)\n\n3. Return the result in this exact JSON format:\n\n```json\n{\n \"invoice_number\": \"\",\n \"invoice_date\": \"\",\n \"due_date\": \"\",\n \"vendor_name\": \"\",\n \"total_amount\": \"\",\n \"currency\": \"\",\n \"items\": [\n {\n \"description\": \"\",\n \"amount\": \"\"\n }\n ],\n \"tax\": \"\",\n \"category\": \"\"\n}\n",
"options": {},
"promptType": "define",
"hasOutputParser": true
},
"typeVersion": 1.9
},
{
"id": "57649f6a-2d4d-4072-92bd-ffea26fdd4dd",
"name": "Insert Invoice Data",
"type": "n8n-nodes-base.googleSheets",
"position": [
1460,
0
],
"parameters": {
"columns": {
"value": {
"Tax": "={{ $('Invoice Parser AI Agent').item.json.output.tax }}",
"Items": "={{ $('Invoice Parser AI Agent').item.json.output.items }}",
"Approved": "={{ $json.data['Approve Invoice?'] }}",
"Category": "={{ $('Invoice Parser AI Agent').item.json.output.category }}",
"Currency": "={{ $('Invoice Parser AI Agent').item.json.output.currency }}",
"Due Date": "={{ $('Invoice Parser AI Agent').item.json.output.due_date }}",
"Reviewed By": "={{ $json.data['Reviewed By'] }}",
"Vendor Name": "={{ $('Invoice Parser AI Agent').item.json.output.vendor_name }}",
"Invoice Date": "={{ $('Invoice Parser AI Agent').item.json.output.invoice_date }}",
"Total Amount": "={{ $('Invoice Parser AI Agent').item.json.output.total_amount }}",
"Approval Notes": "={{ $json.data['Approval Notes'] }}",
"Invoice Number": "={{ $('Invoice Parser AI Agent').item.json.output.invoice_number }}"
},
"schema": [
{
"id": "Invoice Number",
"type": "string",
"display": true,
"required": false,
"displayName": "Invoice Number",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Invoice Date",
"type": "string",
"display": true,
"required": false,
"displayName": "Invoice Date",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Due Date",
"type": "string",
"display": true,
"required": false,
"displayName": "Due Date",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Vendor Name",
"type": "string",
"display": true,
"required": false,
"displayName": "Vendor Name",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Total Amount",
"type": "string",
"display": true,
"required": false,
"displayName": "Total Amount",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Currency",
"type": "string",
"display": true,
"required": false,
"displayName": "Currency",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Items",
"type": "string",
"display": true,
"required": false,
"displayName": "Items",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Tax",
"type": "string",
"display": true,
"required": false,
"displayName": "Tax",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Category",
"type": "string",
"display": true,
"required": false,
"displayName": "Category",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Approved",
"type": "string",
"display": true,
"required": false,
"displayName": "Approved",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Approval Notes",
"type": "string",
"display": true,
"required": false,
"displayName": "Approval Notes",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Reviewed By",
"type": "string",
"display": true,
"required": false,
"displayName": "Reviewed By",
"defaultMatch": false,
"canBeUsedToMatch": true
}
],
"mappingMode": "defineBelow",
"matchingColumns": [],
"attemptToConvertTypes": false,
"convertFieldsToString": false
},
"options": {},
"operation": "append",
"sheetName": {
"__rl": true,
"mode": "list",
"value": "gid=0",
"cachedResultUrl": "https://docs.google.com/spreadsheets/d/1ueJfN5dFTXY3_AdvnYUL5_RjV9YwSFvbxwA_ivtqnJk/edit#gid=0",
"cachedResultName": "Invoices"
},
"documentId": {
"__rl": true,
"mode": "list",
"value": "1ueJfN5dFTXY3_AdvnYUL5_RjV9YwSFvbxwA_ivtqnJk",
"cachedResultUrl": "https://docs.google.com/spreadsheets/d/1ueJfN5dFTXY3_AdvnYUL5_RjV9YwSFvbxwA_ivtqnJk/edit?usp=drivesdk",
"cachedResultName": "Copy of PDF Invoice Parser - n8n template"
}
},
"credentials": {
"googleSheetsOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 4.5
},
{
"id": "2993f865-d46c-489b-ab34-3c62b2c3cb1f",
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"position": [
-460,
-220
],
"parameters": {
"color": 4,
"width": 280,
"height": 500,
"content": "## \uc124\uc815 \ud544\uc694\n\nGoogle Sheets \uad6c\uc870: \n\uc2dc\ud2b8: \"Invoices\" \n\u2022 \uc5f4 A: \uc1a1\uc7a5 \ubc88\ud638 \n\u2022 \uc5f4 B: \uc1a1\uc7a5 \ub0a0\uc9dc \n\u2022 \uc5f4 C: \ub9c8\uac10 \ub0a0\uc9dc \n\u2022 \uc5f4 D: \uacf5\uae09\uc5c5\uccb4 \uc774\ub984 \n\u2022 \uc5f4 E: \ucd1d \uae08\uc561 \n\u2022 \uc5f4 F: \ud1b5\ud654 \n\u2022 \uc5f4 G: \ud56d\ubaa9 \n\u2022 \uc5f4 H: \uc138\uae08 \n\u2022 \uc5f4 I: \uce74\ud14c\uace0\ub9ac \n\u2022 \uc5f4 J: \uc2b9\uc778\ub428 \n\u2022 \uc5f4 K: \uc2b9\uc778 \ub178\ud2b8 \n\u2022 \uc5f4 L: \uac80\ud1a0\uc790 \n\n\ud544\uc694\ud55c \uc790\uaca9\uc99d\uba85: \n\u2022 Google Drive \uc790\uaca9\uc99d\uba85 \n\u2022 Gmail \uc790\uaca9\uc99d\uba85 \n\u2022 Google Sheets \uc790\uaca9\uc99d\uba85 \n\u2022 OpenAI API \ud0a4 (GPT-4)"
},
"typeVersion": 1
},
{
"id": "691f4972-8d18-49fd-b8cd-0c6b2464b078",
"name": "Sticky Note3",
"type": "n8n-nodes-base.stickyNote",
"position": [
-120,
420
],
"parameters": {
"color": 5,
"width": 700,
"height": 560,
"content": "## \ud83e\uddfe OpenAI\uc640 Google Sheets\ub97c \uc0ac\uc6a9\ud55c \uc790\ub3d9\ud654\ub41c PDF \uc778\ubcf4\uc774\uc2a4 \ucc98\ub9ac \ubc0f \uc2b9\uc778 \ud750\ub984\n\nWhat This Template Does:\n\n- **Google Drive**, **Gmail**, \ubc0f **\uc6f9 \ud3fc**\uc5d0\uc11c \ub4e4\uc5b4\uc624\ub294 PDF \uc778\ubcf4\uc774\uc2a4\ub97c \ubaa8\ub2c8\ud130\ub9c1 \n- PDF \ucca8\ubd80 \ud30c\uc77c\uc744 \uc790\ub3d9\uc73c\ub85c \ub2e4\uc6b4\ub85c\ub4dc\ud558\uace0 \uc6d0\uc2dc \ud14d\uc2a4\ud2b8\ub97c \ucd94\ucd9c \n- **GPT-4o-mini**\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc778\ubcf4\uc774\uc2a4 \ub370\uc774\ud130(\uc778\ubcf4\uc774\uc2a4 \ubc88\ud638, \uacf5\uae09\uc790, \ub0a0\uc9dc, \uae08\uc561, \uc138\uae08, \ud56d\ubaa9 \ub4f1)\ub97c \uc9c0\ub2a5\uc801\uc73c\ub85c \uad6c\ubb38 \ubd84\uc11d \n- \uc778\ubcf4\uc774\uc2a4\ub97c *Utilities, Travel, Office Supplies, Food & Beverage, Others*\uc640 \uac19\uc740 \uc720\ud615\uc73c\ub85c \ubd84\ub958 \n- \ub0b4\uc7a5\ub41c \uacb0\uc815 \uc591\uc2dd(Yes/No, \ub9ac\ubdf0\uc5b4 \uc774\ub984, \ub178\ud2b8)\uc774 \ud3ec\ud568\ub41c \ub3d9\uc801 **\uc2b9\uc778 \uc694\uccad \uc774\uba54\uc77c**\uc744 \ubcf4\ub0c4 \n- \uc2b9\uc778\ub41c \ubc0f \uac70\ubd80\ub41c \uc778\ubcf4\uc774\uc2a4 \ub370\uc774\ud130\ub97c **Google Sheets**\uc5d0 \uc800\uc7a5\ud558\uc5ec \uae30\ub85d \uc720\uc9c0 \n- \uac70\ubd80 \uc54c\ub9bc\uc744 \uc7ac\ubb34 \ud300\uc5d0 \ubcf4\ub0b4 \ud6c4\uc18d \uc870\uce58\ub97c \ucde8\ud568 \n- \uc778\uac04 \uac10\ub3c5\uc774 \ud3ec\ud568\ub41c \uc644\uc804\ud55c \uc790\ub3d9\ud654\ub41c \uc2b9\uc778 \ud30c\uc774\ud504\ub77c\uc778\uc744 \uc81c\uacf5 \n- \uc77c\uad00\ub418\uace0 \uc624\ub958 \uc5c6\ub294 AI \ucd9c\ub825\uc744 \uc704\ud55c \uad6c\uc870\ud654\ub41c JSON \uc2a4\ud0a4\ub9c8\ub97c \ud3ec\ud568 \n- \uc785\ub825 \uc18c\uc2a4\ub97c \ub9e4\ubd84\ub9c8\ub2e4 \ud3f4\ub9c1\ud558\uc5ec \uc2e0\uc18d\ud558\uace0 \uc751\ub2f5\uc131 \uc788\ub294 \ucc98\ub9ac\ub97c \ubcf4\uc7a5 \n- AI\ub97c \ud1b5\ud574 \uc778\ubcf4\uc774\uc2a4 \uc2b9\uc778 \ubc0f \ubd80\uae30 \uc6cc\ud06c\ud50c\ub85c\ub97c **\uc790\ub3d9\ud654**\ud558\ub824\ub294 \ube44\uc988\ub2c8\uc2a4\uc5d0 \uc774\uc0c1\uc801"
},
"typeVersion": 1
},
{
"id": "2463666d-8c40-4821-b907-9741e62ce1e7",
"name": "Sticky Note4",
"type": "n8n-nodes-base.stickyNote",
"position": [
620,
420
],
"parameters": {
"color": 5,
"width": 620,
"height": 620,
"content": "## \ud83d\udccb \uc6cc\ud06c\ud50c\ub85c \ud504\ub85c\uc138\uc2a4 \uac1c\uc694\n\n1. **\uc778\ubcf4\uc774\uc2a4 \uc218\uc9d1** \n\uc778\ubcf4\uc774\uc2a4\uac00 \uc138 \uac00\uc9c0 \ud2b8\ub9ac\uac70\ub97c \ud1b5\ud574 \ucea1\ucc98\ub429\ub2c8\ub2e4: Google Drive \ud3f4\ub354\uc758 \uc0c8\ub85c\uc6b4 PDF, PDF \ucca8\ubd80 \ud30c\uc77c\uc774 \uc788\ub294 \ub4e4\uc5b4\uc624\ub294 Gmail \uba54\uc2dc\uc9c0, \ub610\ub294 \uc6f9 \uc591\uc2dd\uc744 \ud1b5\ud55c \uc9c1\uc811 \uc5c5\ub85c\ub4dc.\n\n2. **\ud30c\uc77c \ucc98\ub9ac** \nDrive\ub97c \ud1b5\ud574 \uc5c5\ub85c\ub4dc\ub41c \uacbd\uc6b0, PDF\ub294 \ud30c\uc77c ID\ub97c \uc0ac\uc6a9\ud558\uc5ec \ub2e4\uc6b4\ub85c\ub4dc\ub429\ub2c8\ub2e4; Gmail\uc774\ub098 \uc591\uc2dd\uc744 \ud1b5\ud574 \uc5c5\ub85c\ub4dc\ub41c \uacbd\uc6b0, PDF\ub294 \uc774\ubbf8 \uc774\uc9c4 \ub370\uc774\ud130\ub85c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\n\n3. **\ud14d\uc2a4\ud2b8 \ucd94\ucd9c** \n\uc2dc\uc2a4\ud15c\uc740 \uc18c\uc2a4(Drive, \uc774\uba54\uc77c, \ub610\ub294 \uc591\uc2dd)\uc5d0 \ub530\ub77c \uc801\uc808\ud55c \ubc29\ubc95\uc744 \uc0ac\uc6a9\ud558\uc5ec PDF\uc5d0\uc11c \uc6d0\uc2dc \ud14d\uc2a4\ud2b8\ub97c \ucd94\ucd9c\ud569\ub2c8\ub2e4.\n\n4. **AI \ub370\uc774\ud130 \ud30c\uc2f1** \nGPT-4\uac00 \ucd94\ucd9c\ub41c \ud14d\uc2a4\ud2b8\ub97c \uad6c\uc870\ud654\ub41c JSON\uc73c\ub85c \ucc98\ub9ac\ud558\uc5ec \uc778\ubcf4\uc774\uc2a4 \uc138\ubd80 \uc815\ubcf4(\uacf5\uae09\uc5c5\uccb4, \ub0a0\uc9dc, \uae08\uc561 \ub4f1)\ub97c \uc2dd\ubcc4\ud558\uace0 \uc778\ubcf4\uc774\uc2a4\ub97c \ubd84\ub958\ud569\ub2c8\ub2e4.\n\n5. **\uc2b9\uc778 \uc694\uccad** \n\uac80\ud1a0\uc790\uc5d0\uac8c \uc2b9\uc778 \uc591\uc2dd\uc774 \ud3ec\ud568\ub41c \uc774\uba54\uc77c\uc744 \ubcf4\ub0b4 Yes/No \uacb0\uc815\uc744 \uc694\uccad\ud558\uba70, \uc120\ud0dd\uc801\uc73c\ub85c \ub178\ud2b8\ub97c \ucd94\uac00\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\n\n6. **\uacb0\uc815 \ub77c\uc6b0\ud305** \n\uc2b9\uc778\ub41c \uacbd\uc6b0, \ub370\uc774\ud130\uac00 \uc800\uc7a5\uc744 \uc704\ud574 \uc9c4\ud589\ub429\ub2c8\ub2e4; \uac70\ubd80\ub41c \uacbd\uc6b0, \uc7ac\ubb34 \ud300\uc5d0 \ud1b5\uc9c0\uac00 \ubcf4\ub0b4\uc9d1\ub2c8\ub2e4.\n\n7. **\uc778\ubcf4\uc774\uc2a4 \ub370\uc774\ud130 \uc800\uc7a5** \n\ucd94\ucd9c\ub418\uace0 \uac80\ud1a0\ub41c \ubaa8\ub4e0 \uc778\ubcf4\uc774\uc2a4 \ub370\uc774\ud130\uac00 Google Sheet\uc5d0 \uc800\uc7a5\ub418\uc5b4 \uac01 \uc778\ubcf4\uc774\uc2a4\uc640 \uadf8 \uc0c1\ud0dc\uc5d0 \ub300\ud55c \uc804\uccb4 \uae30\ub85d\uc744 \uc720\uc9c0\ud569\ub2c8\ub2e4."
},
"typeVersion": 1
},
{
"id": "8483b8ef-83d7-4b3f-ad54-b9ec23efc911",
"name": "Send Invoice for Approval",
"type": "n8n-nodes-base.gmail",
"position": [
920,
0
],
"parameters": {
"sendTo": "replace_with_approver_email@yopmail.com",
"message": "=A new invoice has been submitted and requires your review and approval:",
"options": {},
"subject": "=[Action Required] Invoice Approval Request \u2013 {{ $json.output.vendor_name }}",
"operation": "sendAndWait",
"formFields": {
"values": [
{
"fieldType": "dropdown",
"fieldLabel": "Approve Invoice?",
"fieldOptions": {
"values": [
{
"option": "Yes"
},
{
"option": "No"
}
]
},
"requiredField": true
},
{
"fieldLabel": "Reviewed By",
"requiredField": true
},
{
"fieldType": "textarea",
"fieldLabel": "Approval Notes"
}
]
},
"responseType": "customForm"
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 2.1
},
{
"id": "0fece28b-13c8-4b0d-9c1b-84047a3503f6",
"name": "Monitor Email Attachments",
"type": "n8n-nodes-base.gmailTrigger",
"position": [
100,
0
],
"parameters": {
"simple": false,
"filters": {},
"options": {
"downloadAttachments": true,
"dataPropertyAttachmentsPrefixName": "attachment_"
},
"pollTimes": {
"item": [
{
"mode": "everyMinute"
}
]
}
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 1.2
},
{
"id": "d210d1c5-865f-494e-a69c-d25ac462869b",
"name": "Upload Invoice (PDF) Form",
"type": "n8n-nodes-base.formTrigger",
"position": [
100,
200
],
"parameters": {
"options": {},
"formTitle": "Upload Invoice (PDF)",
"formFields": {
"values": [
{
"fieldType": "file",
"fieldLabel": "Upload",
"multipleFiles": false,
"requiredField": true,
"acceptFileTypes": ".pdf"
}
]
},
"formDescription": "Upload your invoice PDF using this form."
},
"typeVersion": 2.2
},
{
"id": "4703ddb5-1e07-43b9-a465-c9aced0ac9d8",
"name": "Extract Text from Drive PDF",
"type": "n8n-nodes-base.extractFromFile",
"position": [
300,
-220
],
"parameters": {
"options": {},
"operation": "pdf"
},
"typeVersion": 1
},
{
"id": "7ca78f71-8c1e-42e2-8686-08f2a9bfc009",
"name": "Extract Text from Email PDF",
"type": "n8n-nodes-base.extractFromFile",
"position": [
300,
0
],
"parameters": {
"options": {},
"operation": "pdf",
"binaryPropertyName": "attachment_0"
},
"typeVersion": 1
},
{
"id": "0b4aff7d-8c92-4964-a38c-996b546ed23a",
"name": "Extract Text from Form PDF",
"type": "n8n-nodes-base.extractFromFile",
"position": [
300,
200
],
"parameters": {
"options": {},
"operation": "pdf",
"binaryPropertyName": "Upload"
},
"typeVersion": 1
},
{
"id": "eef8e5e5-2b01-4ddd-8ea2-312fb41356de",
"name": "Check Approval Decision",
"type": "n8n-nodes-base.if",
"position": [
1180,
0
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "451bfdfc-f645-4e3c-91cc-895558f45b11",
"operator": {
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.data['Approve Invoice?'] }}",
"rightValue": "Yes"
}
]
}
},
"typeVersion": 2.2
},
{
"id": "ac5dd79d-9d32-44f9-8a9b-2cc45757110b",
"name": "Send Rejection Alert",
"type": "n8n-nodes-base.gmail",
"position": [
1320,
260
],
"parameters": {
"sendTo": "finance_team@yopmail.com",
"message": "=Hi Finance Team,\n\nAn invoice from {{ $('Invoice Parser AI Agent').item.json.output.vendor_name }} has been disapproved during the approval process.\n\nReviewed By: {{ $('Send Invoice for Approval').item.json.data['Reviewed By'] }}\nApproval Notes: {{ $('Send Invoice for Approval').item.json.data['Approval Notes'] }}\n\nPlease review and follow up as needed.\n\nThank you,\nAutomated Invoice System\n\n",
"options": {
"appendAttribution": false
},
"subject": "=[Alert] Invoice Disapproved \u2013 {{ $('Invoice Parser AI Agent').item.json.output.vendor_name }}",
"emailType": "text"
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 2.1
}
],
"connections": {
"OpenAI Chat Model": {
"ai_languageModel": [
[
{
"node": "Invoice Parser AI Agent",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Download Invoice PDF": {
"main": [
[
{
"node": "Extract Text from Drive PDF",
"type": "main",
"index": 0
}
]
]
},
"Send Rejection Alert": {
"main": [
[
{
"node": "Insert Invoice Data",
"type": "main",
"index": 0
}
]
]
},
"Invoice Folder Monitor": {
"main": [
[
{
"node": "Download Invoice PDF",
"type": "main",
"index": 0
}
]
]
},
"Check Approval Decision": {
"main": [
[
{
"node": "Insert Invoice Data",
"type": "main",
"index": 0
}
],
[
{
"node": "Send Rejection Alert",
"type": "main",
"index": 0
}
]
]
},
"Invoice Parser AI Agent": {
"main": [
[
{
"node": "Send Invoice for Approval",
"type": "main",
"index": 0
}
]
]
},
"Structured Output Parser": {
"ai_outputParser": [
[
{
"node": "Invoice Parser AI Agent",
"type": "ai_outputParser",
"index": 0
}
]
]
},
"Monitor Email Attachments": {
"main": [
[
{
"node": "Extract Text from Email PDF",
"type": "main",
"index": 0
}
]
]
},
"Send Invoice for Approval": {
"main": [
[
{
"node": "Check Approval Decision",
"type": "main",
"index": 0
}
]
]
},
"Upload Invoice (PDF) Form": {
"main": [
[
{
"node": "Extract Text from Form PDF",
"type": "main",
"index": 0
}
]
]
},
"Extract Text from Form PDF": {
"main": [
[
{
"node": "Invoice Parser AI Agent",
"type": "main",
"index": 0
}
]
]
},
"Extract Text from Drive PDF": {
"main": [
[
{
"node": "Invoice Parser AI Agent",
"type": "main",
"index": 0
}
]
]
},
"Extract Text from Email PDF": {
"main": [
[
{
"node": "Invoice Parser AI Agent",
"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
Pro
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About this workflow
4452. Uses lmChatOpenAi, outputParserStructured, googleDriveTrigger, googleDrive. Event-driven trigger; 17 nodes.
Source: https://github.com/n8nKOR/n8n-shared-workflow/blob/62a671327e906c22a40d290b339ff6d2373f8d75/workflows/n8nworkflows/ai/4452.json — original creator credit. Request a take-down →
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