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": "Xs7x61YMFsbpB4vg",
"meta": {
"templateCredsSetupCompleted": true
},
"name": "Colombian Invoices Processing",
"tags": [],
"nodes": [
{
"id": "3bcb9b75-a697-4948-974a-f4ea29947bfa",
"name": "Loop Over Items",
"type": "n8n-nodes-base.splitInBatches",
"position": [
880,
445
],
"parameters": {
"options": {}
},
"typeVersion": 3
},
{
"id": "03076b82-d824-4fe1-b659-7fbfa2f3fd87",
"name": "OpenAI Chat Model",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
2420,
790
],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "gpt-4o-mini"
},
"options": {}
},
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
},
"typeVersion": 1.2
},
{
"id": "201ae476-d189-4ba7-9a96-6f272b95795d",
"name": "Calculator",
"type": "@n8n/n8n-nodes-langchain.toolCalculator",
"position": [
2540,
790
],
"parameters": {},
"typeVersion": 1
},
{
"id": "9aca7e2d-af43-4de6-aa07-2e880d660d20",
"name": "Structured Output Parser",
"type": "@n8n/n8n-nodes-langchain.outputParserStructured",
"position": [
2660,
790
],
"parameters": {
"jsonSchemaExample": "{\n \"Tipo\": \"Factura\",\n \"Numero_Factura\": \"FAC-2025-00123\",\n \"Fecha_Emision\": \"2025-05-07\",\n \"CUFE\": \"f4a6c8b03e1e4e8b90f9e3e2945d8b23c5b4e2fa\",\n \"NIT_Emisor\": \"900123456\",\n \"Razon_Social_Emisor\": \"Comercializadora XYZ S.A.S.\",\n \"NIT_Receptor\": \"1012345678\",\n \"Valor_Antes_Impuesto\": 1000000,\n \"Impuesto\": 190000,\n \"Total\": 1190000,\n \"Resumen_Compra\": \"Compra de equipos de oficina incluyendo escritorios y sillas ejecutivas\"\n}"
},
"typeVersion": 1.2
},
{
"id": "7793086c-b1f7-49f7-b67a-77721087fea5",
"name": "On Email receipt",
"type": "n8n-nodes-base.gmailTrigger",
"notes": "Executed every 30 minutes as it's for personal invoices, one can wait",
"position": [
0,
445
],
"parameters": {
"simple": false,
"filters": {
"q": "has:attachment filename:zip"
},
"options": {
"downloadAttachments": true
},
"pollTimes": {
"item": [
{
"mode": "everyX",
"unit": "minutes",
"value": 30
}
]
}
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"notesInFlow": false,
"typeVersion": 1.2
},
{
"id": "97460873-8220-476b-97e7-cf433be3f9cd",
"name": "Get Filename and mimeType",
"type": "n8n-nodes-base.code",
"position": [
220,
445
],
"parameters": {
"jsCode": "let results = [];\n\nfor (item of items) {\n for (key of Object.keys(item.binary)) {\n results.push({\n json: {\n fileName: item.binary[key].fileName,\n mimeType: item.binary[key].mimeType,\n },\n binary: {\n data: item.binary[key],\n }\n });\n }\n}\n\nreturn results;"
},
"typeVersion": 2
},
{
"id": "e01cdfc7-c343-444e-a6ca-57b2139c3b6e",
"name": "Filter ZIP files only",
"type": "n8n-nodes-base.filter",
"position": [
440,
445
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "ccb7942e-8cef-480c-98a4-b5b68d98a235",
"operator": {
"type": "string",
"operation": "endsWith"
},
"leftValue": "={{ $json.mimeType }}",
"rightValue": "zip"
}
]
}
},
"typeVersion": 2.2
},
{
"id": "855b3a55-5d2e-4da1-aef7-76bf559da876",
"name": "Unzip Invoice",
"type": "n8n-nodes-base.compression",
"position": [
660,
445
],
"parameters": {},
"typeVersion": 1.1
},
{
"id": "c48abfc9-dff9-49ef-bb59-212f2f1eb472",
"name": "Just for style",
"type": "n8n-nodes-base.noOp",
"position": [
1100,
270
],
"parameters": {},
"typeVersion": 1
},
{
"id": "b84984d5-f736-40be-b0b5-2d0a245c79a6",
"name": "Get filename and mimeType on extracted docs",
"type": "n8n-nodes-base.code",
"position": [
1100,
470
],
"parameters": {
"jsCode": "let results = [];\n\nfor (item of items) {\n for (key of Object.keys(item.binary)) {\n results.push({\n json: {\n fileName: item.binary[key].fileName,\n mimeType: item.binary[key].mimeType,\n },\n binary: {\n data: item.binary[key],\n }\n });\n }\n}\n\nreturn results;"
},
"typeVersion": 2
},
{
"id": "9ff8e500-8135-4960-81f5-fbc0945d45db",
"name": "Split XML and PDF",
"type": "n8n-nodes-base.switch",
"position": [
1320,
470
],
"parameters": {
"rules": {
"values": [
{
"outputKey": "pdf",
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "69784ebe-7edd-4e50-89c3-8440a662f25a",
"operator": {
"type": "string",
"operation": "contains"
},
"leftValue": "={{ $json.mimeType }}",
"rightValue": "pdf"
}
]
},
"renameOutput": true
},
{
"outputKey": "xml",
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "90f50e8d-bd72-4fdf-b854-e473b117377a",
"operator": {
"type": "string",
"operation": "contains"
},
"leftValue": "={{ $json.mimeType }}",
"rightValue": "xml"
}
]
},
"renameOutput": true
}
]
},
"options": {
"fallbackOutput": "none"
}
},
"typeVersion": 3.2
},
{
"id": "1132645b-9270-4581-9707-59bec4ee2417",
"name": "Extract PDF Data",
"type": "n8n-nodes-base.extractFromFile",
"position": [
1760,
445
],
"parameters": {
"options": {
"joinPages": true
},
"operation": "pdf"
},
"typeVersion": 1
},
{
"id": "215b29f9-0e0a-4989-a6d3-65faa5941729",
"name": "Extract XML Data",
"type": "n8n-nodes-base.extractFromFile",
"position": [
1540,
645
],
"parameters": {
"options": {},
"operation": "xml"
},
"typeVersion": 1
},
{
"id": "7fa1555e-11ae-4fca-b526-52d2b4a1773e",
"name": "Convert to JSON",
"type": "n8n-nodes-base.xml",
"position": [
1760,
645
],
"parameters": {
"options": {}
},
"typeVersion": 1
},
{
"id": "cb581772-cb26-4d36-b1b9-c290f5a0a4ea",
"name": "Append both Docs",
"type": "n8n-nodes-base.merge",
"position": [
1980,
570
],
"parameters": {},
"typeVersion": 3.1
},
{
"id": "225b6fd6-4cfd-43d7-9c3e-fe20d97831d7",
"name": "Aggregate all Data into 1 list",
"type": "n8n-nodes-base.aggregate",
"position": [
2200,
580
],
"parameters": {
"options": {},
"aggregate": "aggregateAllItemData"
},
"typeVersion": 1
},
{
"id": "947001a4-bcdc-4421-bdce-07d41fc85c88",
"name": "Extract Data from PDF and XML",
"type": "@n8n/n8n-nodes-langchain.agent",
"position": [
2452,
570
],
"parameters": {
"text": "=PDF:\n{{ $json.data[0].text }}\n\nXML: \n{{ $json.data[1].AttachedDocument['cac:Attachment']['cac:ExternalReference']['cbc:Description'] }}",
"options": {
"systemMessage": "=Extrae del PDF y el XML proporcionados la siguiente informaci\u00f3n:\n\t\u2022\tTipo: Factura o Nota Cr\u00e9dito\n\t\u2022\tN\u00famero de factura\n\t\u2022\tFecha de emisi\u00f3n (formato: YYYY-MM-DD)\n\t\u2022\tNIT del emisor (sin d\u00edgito de verificaci\u00f3n, solo los n\u00fameros antes del guion)\n\t\u2022\tNIT del receptor (sin d\u00edgito de verificaci\u00f3n)\n\t\u2022\tRaz\u00f3n social del emisor\n\t\u2022\tValor antes de IVA\n\t\u2022\tValor del IVA\n\t\u2022\tValor total de la factura\n\t\u2022\tCUFE\n\t\u2022\tResumen de la compra (m\u00e1ximo 20 palabras, describiendo en t\u00e9rminos generales qu\u00e9 se compr\u00f3, usando solo may\u00fasculas donde corresponda gramaticalmente. Ejemplo: \u201cCONSULTA DE PRIMERA VEZ POR OPTOMETRIA\u201d \u2192 \u201cConsulta de primera vez por optometr\u00eda\u201d)\n\nVerifica que:\nValor total = Valor antes de IVA + Valor del IVA, usando la herramienta Calculator."
},
"promptType": "define",
"hasOutputParser": true
},
"typeVersion": 1.9
},
{
"id": "3eb86ff2-7a4b-4e17-af92-057b715fd69d",
"name": "Create initial PDF",
"type": "n8n-nodes-base.googleDrive",
"position": [
2530,
220
],
"parameters": {
"name": "={{ $json.fileName }}",
"driveId": {
"__rl": true,
"mode": "list",
"value": "My Drive"
},
"options": {},
"folderId": {
"__rl": true,
"mode": "list",
"value": "1v0sqvMCFAN02WzXdTuoYF8KGw7Y0Tmf1",
"cachedResultUrl": "https://drive.google.com/drive/folders/xxxxxxx",
"cachedResultName": "Facturas"
}
},
"credentials": {
"googleDriveOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 3
},
{
"id": "cbe7bcf2-972b-4110-8d1c-075fcc34497a",
"name": "Merge both flows",
"type": "n8n-nodes-base.merge",
"position": [
2860,
495
],
"parameters": {
"mode": "combine",
"options": {},
"combineBy": "combineAll"
},
"typeVersion": 3.1
},
{
"id": "14243355-766d-425d-90d1-6f114903636a",
"name": "Update PDF with actual name",
"type": "n8n-nodes-base.googleDrive",
"position": [
3080,
495
],
"parameters": {
"fileId": {
"__rl": true,
"mode": "id",
"value": "={{ $json.id }}"
},
"options": {},
"operation": "update",
"changeFileContent": "",
"newUpdatedFileName": "={{ $json.output.Fecha_Emision }}-{{ $json.output.Numero_Factura }}.pdf"
},
"credentials": {
"googleDriveOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 3
},
{
"id": "aa623454-553a-4b95-b320-964c68dd7555",
"name": "Get Current Date",
"type": "n8n-nodes-base.code",
"notes": "Not in use actually...",
"position": [
3300,
495
],
"parameters": {
"jsCode": "const now = new Date();\n\n// Get Colombia time values\nconst options = { timeZone: 'America/Bogota', year: 'numeric', month: '2-digit', day: '2-digit' };\nconst formatter = new Intl.DateTimeFormat('en-CA', options); // en-CA gives YYYY-MM-DD format\nconst [year, month, day] = formatter.format(now).split('-');\n\nreturn [\n {\n json: {\n year,\n month,\n day\n }\n }\n];"
},
"typeVersion": 2
},
{
"id": "466a2885-adba-41ce-8a51-8c36db58a113",
"name": "Create or update row",
"type": "n8n-nodes-base.googleSheets",
"position": [
3520,
620
],
"parameters": {
"columns": {
"value": {
"Key": "={{ $('Merge both flows').item.json.output.NIT_Emisor }}-{{ $('Merge both flows').item.json.output.Numero_Factura }}",
"CUFE": "={{ $('Merge both flows').item.json.output.CUFE }}",
"Tipo": "={{ $('Merge both flows').item.json.output.Tipo }}",
"Fecha": "={{ $('Merge both flows').item.json.output.Fecha_Emision }}",
"Total": "={{ $('Merge both flows').item.json.output.Total }}",
"Factura": "={{ $('Extract Data from PDF and XML').item.json.output.Numero_Factura }}",
"Impuesto": "={{ $('Merge both flows').item.json.output.Impuesto }}",
"Subtotal": "={{ $('Merge both flows').item.json.output.Valor_Antes_Impuesto }}",
"NIT Emisor": "={{ $('Merge both flows').item.json.output.NIT_Emisor }}",
"NIT Receptor": "={{ $('Merge both flows').item.json.output.NIT_Receptor }}",
"Raz\u00f3n Social": "={{ $('Merge both flows').item.json.output.Razon_Social_Emisor }}",
"Resumen Compra": "={{ $('Merge both flows').item.json.output.Resumen_Compra }}"
},
"schema": [
{
"id": "Factura",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "Factura",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Tipo",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "Tipo",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Key",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "Key",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Fecha",
"type": "string",
"display": true,
"required": false,
"displayName": "Fecha",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Raz\u00f3n Social",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "Raz\u00f3n Social",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "NIT Emisor",
"type": "string",
"display": true,
"required": false,
"displayName": "NIT Emisor",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "NIT Receptor",
"type": "string",
"display": true,
"required": false,
"displayName": "NIT Receptor",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Subtotal",
"type": "string",
"display": true,
"required": false,
"displayName": "Subtotal",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Impuesto",
"type": "string",
"display": true,
"required": false,
"displayName": "Impuesto",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Total",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "Total",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "CUFE",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "CUFE",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Resumen Compra",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "Resumen Compra",
"defaultMatch": false,
"canBeUsedToMatch": true
}
],
"mappingMode": "defineBelow",
"matchingColumns": [
"Key"
],
"attemptToConvertTypes": false,
"convertFieldsToString": false
},
"options": {},
"operation": "appendOrUpdate",
"sheetName": {
"__rl": true,
"mode": "list",
"value": "gid=0",
"cachedResultUrl": "https://docs.google.com/spreadsheets/d/xxxxx/edit#gid=0",
"cachedResultName": "Sheet1"
},
"documentId": {
"__rl": true,
"mode": "list",
"value": "1HmtB_MXS7oOJn86V3dcBjLdvnw3aWLkD36avc147zuI",
"cachedResultUrl": "https://docs.google.com/spreadsheets/xxxxx/edit?usp=drivesdk",
"cachedResultName": "Facturas"
}
},
"credentials": {
"googleSheetsOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 4.5
},
{
"id": "e7076c9e-1998-4aab-bb43-9d9f89a3377f",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
-60,
-480
],
"parameters": {
"width": 960,
"height": 880,
"content": "# \ud83e\uddfe Colombian electronic invoices processing\n\nThis N8N workflow automates the extraction and organization of **personal electronic invoices** in Colombia received via **Gmail**. It includes the following key steps:\n\n## \ud83d\udd01 Flow Summary\n\n1. **Email Trigger**\n - Polls Gmail every **30 minutes** for emails with `.zip` attachments (assumed to contain invoices).\n - Following DIAN requirements in Colombia\n\n2. **ZIP File Handling**\n - Extracts all files.\n - Filters only **PDF** and **XML** files for processing.\n\n3. **Data Extraction & Processing**\n - Uses **LangChain Agent + OpenAI (GPT-4o-mini)** to extract:\n - Tipo de documento (Factura / Nota Cr\u00e9dito)\n - N\u00famero de factura\n - Fecha de emisi\u00f3n (YYYY-MM-DD)\n - NIT emisor y receptor (sin d\u00edgito de verificaci\u00f3n)\n - Raz\u00f3n social del emisor\n - Subtotal, IVA, Total\n - CUFE\n - Resumen de compra (max 20 words, formatted sentence)\n\n4. **Validation**\n - Ensures **Total = Subtotal + IVA** using a calculator node.\n\n5. **Storage**\n - Uploads the original PDF to **Google Drive**.\n - Renames the file to: `YYYY-MM-DD-NUMERO_FACTURA.pdf`.\n - Inserts or updates invoice details in **Google Sheets** using a unique `Key` (`NIT_Emisor + Numero_Factura`) to prevent duplication.\n\n---\n\n> \u2699\ufe0f Designed for personal use with minimal latency tolerance and high automation reliability."
},
"typeVersion": 1
}
],
"active": true,
"settings": {
"executionOrder": "v1"
},
"versionId": "fefb527f-7457-46bc-a80c-ca290b163bce",
"connections": {
"Calculator": {
"ai_tool": [
[
{
"node": "Extract Data from PDF and XML",
"type": "ai_tool",
"index": 0
}
]
]
},
"Unzip Invoice": {
"main": [
[
{
"node": "Loop Over Items",
"type": "main",
"index": 0
}
]
]
},
"Convert to JSON": {
"main": [
[
{
"node": "Append both Docs",
"type": "main",
"index": 1
}
]
]
},
"Loop Over Items": {
"main": [
[
{
"node": "Just for style",
"type": "main",
"index": 0
}
],
[
{
"node": "Get filename and mimeType on extracted docs",
"type": "main",
"index": 0
}
]
]
},
"Append both Docs": {
"main": [
[
{
"node": "Aggregate all Data into 1 list",
"type": "main",
"index": 0
}
]
]
},
"Extract PDF Data": {
"main": [
[
{
"node": "Append both Docs",
"type": "main",
"index": 0
}
]
]
},
"Extract XML Data": {
"main": [
[
{
"node": "Convert to JSON",
"type": "main",
"index": 0
}
]
]
},
"Get Current Date": {
"main": [
[
{
"node": "Create or update row",
"type": "main",
"index": 0
}
]
]
},
"Merge both flows": {
"main": [
[
{
"node": "Update PDF with actual name",
"type": "main",
"index": 0
}
]
]
},
"On Email receipt": {
"main": [
[
{
"node": "Get Filename and mimeType",
"type": "main",
"index": 0
}
]
]
},
"OpenAI Chat Model": {
"ai_languageModel": [
[
{
"node": "Extract Data from PDF and XML",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Split XML and PDF": {
"main": [
[
{
"node": "Create initial PDF",
"type": "main",
"index": 0
},
{
"node": "Extract PDF Data",
"type": "main",
"index": 0
}
],
[
{
"node": "Extract XML Data",
"type": "main",
"index": 0
}
]
]
},
"Create initial PDF": {
"main": [
[
{
"node": "Merge both flows",
"type": "main",
"index": 0
}
]
]
},
"Create or update row": {
"main": [
[
{
"node": "Loop Over Items",
"type": "main",
"index": 0
}
]
]
},
"Filter ZIP files only": {
"main": [
[
{
"node": "Unzip Invoice",
"type": "main",
"index": 0
}
]
]
},
"Structured Output Parser": {
"ai_outputParser": [
[
{
"node": "Extract Data from PDF and XML",
"type": "ai_outputParser",
"index": 0
}
]
]
},
"Get Filename and mimeType": {
"main": [
[
{
"node": "Filter ZIP files only",
"type": "main",
"index": 0
}
]
]
},
"Update PDF with actual name": {
"main": [
[
{
"node": "Get Current Date",
"type": "main",
"index": 0
}
]
]
},
"Extract Data from PDF and XML": {
"main": [
[
{
"node": "Merge both flows",
"type": "main",
"index": 1
}
]
]
},
"Aggregate all Data into 1 list": {
"main": [
[
{
"node": "Extract Data from PDF and XML",
"type": "main",
"index": 0
}
]
]
},
"Get filename and mimeType on extracted docs": {
"main": [
[
{
"node": "Split XML and PDF",
"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
About this workflow
Colombian Invoices Processing. Uses splitInBatches, lmChatOpenAi, toolCalculator, outputParserStructured. Event-driven trigger; 23 nodes.
Source: https://github.com/Zie619/n8n-workflows — original creator credit. Request a take-down →