Extraction OCR de lettres gouvernementales thaïlandaises par Mistral
Avancé
Ceci est unDocument Extraction, AI Summarizationworkflow d'automatisation du domainecontenant 29 nœuds.Utilise principalement des nœuds comme If, Set, Merge, Webhook, MistralAi. Extraire les données de lettres gouvernementales thaïlandaises et stocker dans Google Sheets avec Mistral OCR
Prérequis
- •Point de terminaison HTTP Webhook (généré automatiquement par n8n)
- •Informations d'identification Google Drive API
- •Peut nécessiter les informations d'identification d'authentification de l'API cible
- •Informations d'identification Google Sheets API
- •Clé API OpenAI
Nœuds utilisés (29)
Catégorie
Aperçu du workflow
Visualisation des connexions entre les nœuds, avec support du zoom et du déplacement
Exporter le workflow
Copiez la configuration JSON suivante dans n8n pour importer et utiliser ce workflow
{
"id": "IwCDobE0PCV4O35E",
"meta": {
"instanceId": "2c12b0b552404dc07af67cd5f092afd21d18c808d4fdabdb04cb4b064195b6fb",
"templateCredsSetupCompleted": true
},
"name": "ThaiLetterWtihMistralOCR_ENG",
"tags": [],
"nodes": [
{
"id": "beb2e565-ce98-4068-9a78-b4a26b85bd80",
"name": "Note adhésive",
"type": "n8n-nodes-base.stickyNote",
"position": [
-3888,
-32
],
"parameters": {
"width": 261,
"height": 608,
"content": "## LINE Bot Letter OCR Workflow\n\n**Features:**\n- Receive files from LINE and Google Drive\n- OCR using Mistral Document AI\n- Extract invoice information using OpenAI's Information Extractor\n- Automatically log data into Google Sheets\n\n\n**Required Environment Variables:**\n- LINE_CHANNEL_ACCESS_TOKEN\n- GDRIVE_INVOICE_FOLDER_ID \n- MISTRAL_API_KEY\n- GSHEET_ID\n\n\n**Required Credentials:**\n- googleDriveOAuth2Api\n- googleSheetsOAuth2Api"
},
"typeVersion": 1
},
{
"id": "30426fbd-4053-415d-b3b5-fc3dff0b1b82",
"name": "LINE Webhook",
"type": "n8n-nodes-base.webhook",
"position": [
-3568,
176
],
"webhookId": "bf82240d-06be-4f2a-94b0-85d76943a314",
"parameters": {
"path": "webhook-linebot-test",
"options": {},
"httpMethod": "POST"
},
"typeVersion": 2
},
{
"id": "9a8dbc27-67e0-44db-aa45-677ada852e1b",
"name": "Note adhésive1",
"type": "n8n-nodes-base.stickyNote",
"position": [
-3616,
-32
],
"parameters": {
"color": 4,
"width": 200,
"height": 341,
"content": "### LINE Webhook\n\n**Receive data from LINE:**\n- Accepts POST request from LINE Messaging API\n- Extracts `messageId` for downloading file\n\n**Path:** `/line-invoice`\n**Method:** `POST`"
},
"typeVersion": 1
},
{
"id": "2a996f22-ad7f-4c4e-ae64-7e098e2dccda",
"name": "Obtenir le fichier Line",
"type": "n8n-nodes-base.httpRequest",
"position": [
-3296,
176
],
"parameters": {
"url": "=https://api-data.line.me/v2/bot/message/{{ $json.body.events[0].message.id }}/content",
"options": {
"response": {
"response": {
"responseFormat": "file"
}
}
},
"sendHeaders": true,
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"headerParameters": {
"parameters": [
{}
]
}
},
"credentials": {
"httpHeaderAuth": {
"id": "byY3kI23lMe4ewnM",
"name": "Header Auth account - Maid"
}
},
"typeVersion": 4.2
},
{
"id": "bead3404-66a3-4d15-98d3-ec1cf2eda7a7",
"name": "Définir les données Line",
"type": "n8n-nodes-base.set",
"position": [
-3072,
176
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "42960a6d-c039-42f7-9658-22e56159b931",
"name": "source",
"type": "string",
"value": "line"
},
{
"id": "a17844e1-5328-42e6-b67f-d3c6886e1d95",
"name": " fileName",
"type": "string",
"value": "={{ $json.body.events[0].message.fileName }}"
},
{
"id": "983bf680-ee70-4c70-8aa9-811cd5b81a04",
"name": "fileId",
"type": "string",
"value": "={{ $('LINE Webhook').item.json.body.events[0].message.id }}"
}
]
},
"includeOtherFields": true
},
"typeVersion": 3.4,
"alwaysOutputData": false
},
{
"id": "399b0815-e925-46de-bc80-9befdbe48739",
"name": "Note adhésive2",
"type": "n8n-nodes-base.stickyNote",
"position": [
-3408,
-32
],
"parameters": {
"color": 4,
"width": 567,
"height": 341,
"content": "### Download File from LINE\n\n**Process:**\n1. Check if message type is \"image\"\n2. Use `messageId` to download the file\n3. Set metadata fields: source, fileName, fileId\n4. Store `fileBinary` for OCR\n\n**LINE API:** \n`https://api-data.line.me/v2/bot/message/{messageId}/content`\n"
},
"typeVersion": 1
},
{
"id": "a066a27e-e10c-4bd4-8663-b9614682e991",
"name": "Déclencheur Google Drive",
"type": "n8n-nodes-base.googleDriveTrigger",
"position": [
-3344,
336
],
"parameters": {
"event": "fileCreated",
"options": {},
"pollTimes": {
"item": [
{
"mode": "everyMinute"
}
]
},
"triggerOn": "specificFolder",
"folderToWatch": {
"__rl": true,
"mode": "id",
"value": "1hRyZcu2RZsRMvLjl2GKNALzxhgRl8ZKI"
}
},
"credentials": {
"googleDriveOAuth2Api": {
"id": "QVrgALkld7whKIgB",
"name": "Google Drive account - Peakwave"
}
},
"typeVersion": 1
},
{
"id": "f278bb26-dc66-4d55-a2c5-0065775f471b",
"name": "Note adhésive3",
"type": "n8n-nodes-base.stickyNote",
"position": [
-3616,
320
],
"parameters": {
"color": 5,
"width": 776,
"height": 257,
"content": "\n### Google Drive Trigger\n\n**Monitor for new files:**\n- Watch a specific folder in Google Drive\n- Trigger the workflow when a new file is added\n- Supports PDF, JPG, JPEG formats\n\n**Folder ID:** `$env.GDRIVE_INVOICE_FOLDER_ID` \n**Event:** `fileCreated"
},
"typeVersion": 1
},
{
"id": "b85acdcb-66bb-4707-98ca-e91af2a614d2",
"name": "Télécharger le fichier (Drive)",
"type": "n8n-nodes-base.googleDrive",
"position": [
-3136,
336
],
"parameters": {
"fileId": "={{ $json.id }}",
"options": {},
"operation": "download"
},
"credentials": {
"googleDriveOAuth2Api": {
"id": "QVrgALkld7whKIgB",
"name": "Google Drive account - Peakwave"
}
},
"typeVersion": 3
},
{
"id": "dac53614-da13-4147-992a-f0db91e7bc89",
"name": "Fusionner les sources de données",
"type": "n8n-nodes-base.merge",
"position": [
-2768,
256
],
"parameters": {
"mode": "combine",
"options": {},
"combinationMode": "mergeByPosition"
},
"typeVersion": 2.1,
"alwaysOutputData": true
},
{
"id": "fcecfcb9-deb2-489b-a36e-e71c779f0d29",
"name": "Note adhésive4",
"type": "n8n-nodes-base.stickyNote",
"position": [
-2832,
-32
],
"parameters": {
"width": 231,
"height": 609,
"content": "### Merge Data Sources\n\n**Combine data from both sources:**\n- LINE: source = \"line\", fileName, fileId, fileBinary\n- Drive: source = \"drive\", fileName, fileId, fileBinary\n\n**Output:** Unified data object for downstream processing \n**Mode:** `combineAll`\n"
},
"typeVersion": 1
},
{
"id": "2b36574f-9c6b-46da-8902-9efbc07667b3",
"name": "Vérifier le type de fichier",
"type": "n8n-nodes-base.if",
"position": [
-2528,
176
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 1,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "or",
"conditions": [
{
"id": "condition1",
"operator": {
"type": "string",
"operation": "regex",
"singleValue": true
},
"leftValue": "={{ $binary.data.mimeType }}",
"rightValue": "^image/(jpg|jpeg|png)$"
}
]
}
},
"typeVersion": 2
},
{
"id": "f5c236db-a54d-4c15-bf40-e9166a552cfc",
"name": "Note adhésive5",
"type": "n8n-nodes-base.stickyNote",
"position": [
-2592,
-32
],
"parameters": {
"width": 231,
"height": 341,
"content": "### File Type Check\n\n**Determine file type:**\n- JPG, JPEG → OCR Image Processing\n- PDF → OCR Document Processing\n\n**Regex Pattern:** `.*\\.(jpg|jpeg|png)$`\n\n**True:** Continue to OCR via Mistral \n**False:** Fallback to extract info from filename"
},
"typeVersion": 1
},
{
"id": "c6948c15-9278-4c2b-9d6e-c832e43b75c8",
"name": "Note adhésive6",
"type": "n8n-nodes-base.stickyNote",
"position": [
-2352,
-32
],
"parameters": {
"width": 279,
"height": 341,
"content": "### Mistral OCR Image\n\n**OCR using AI:**\n\n**Steps:**\n1. Encode image file to Base64\n2. Send to Mistral OCR node\n3. Receive parsed text from the image"
},
"typeVersion": 1
},
{
"id": "1bfcad59-b68e-47ee-8796-71ee066cf8fa",
"name": "Note adhésive7",
"type": "n8n-nodes-base.stickyNote",
"position": [
-2592,
320
],
"parameters": {
"width": 519,
"height": 261,
"content": "### Mistral OCR Document\n\n**OCR using AI:**\n\n**Steps:**\n1. Encode PDF file to Base64\n2. Send to Mistral OCR node\n3. Receive parsed text from the document"
},
"typeVersion": 1
},
{
"id": "1700e1d6-b00a-4872-96b7-5f46f50cce94",
"name": "Note adhésive8",
"type": "n8n-nodes-base.stickyNote",
"position": [
-2064,
-32
],
"parameters": {
"width": 343,
"height": 341,
"content": "### AI Validation Agent\n\n**Extract and validate data using AI:**\n\n**Validation fields:**\n- book_id\n- subject\n- to\n- ..."
},
"typeVersion": 1
},
{
"id": "d1974977-c464-4b6f-8ad2-d3000b9ccde6",
"name": "Écrire dans Google Sheet",
"type": "n8n-nodes-base.googleSheets",
"position": [
-1520,
160
],
"parameters": {
"columns": {
"value": {
"to": "={{ $json.output.to }}",
"date": "={{ $json.output.date }}",
"attach": "={{ $json.output.attach }}",
"detail": "={{ $json.output.detail }}",
"book_id": "={{ $json.output.book_id }}",
"subject": "={{ $json.output.subject }}",
"signed_by": "={{ $json.output.signed_by }}",
"download_url": "={{ $json.output.download_url }}",
"contact_email": "={{ $json.output.contact_email }}",
"contact_phone": "={{ $json.output.contact_phone }}",
"signed_by_position": "={{ $json.output.signed_by_position }}"
},
"schema": [
{
"id": "book_id",
"type": "string",
"display": true,
"required": false,
"displayName": "book_id",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "date",
"type": "string",
"display": true,
"required": false,
"displayName": "date",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "subject",
"type": "string",
"display": true,
"required": false,
"displayName": "subject",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "to",
"type": "string",
"display": true,
"required": false,
"displayName": "to",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "attach",
"type": "string",
"display": true,
"required": false,
"displayName": "attach",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "detail",
"type": "string",
"display": true,
"required": false,
"displayName": "detail",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "signed_by",
"type": "string",
"display": true,
"required": false,
"displayName": "signed_by",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "signed_by_position",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "signed_by_position",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "contact_phone",
"type": "string",
"display": true,
"required": false,
"displayName": "contact_phone",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "contact_email",
"type": "string",
"display": true,
"required": false,
"displayName": "contact_email",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "download_url",
"type": "string",
"display": true,
"required": false,
"displayName": "download_url",
"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/1asLDGXnPA4K55RfLDGRkgQzOpnKezDoVibWgnGaGUJ0/edit#gid=0",
"cachedResultName": "Sheet1"
},
"documentId": {
"__rl": true,
"mode": "list",
"value": "1asLDGXnPA4K55RfLDGRkgQzOpnKezDoVibWgnGaGUJ0",
"cachedResultUrl": "https://docs.google.com/spreadsheets/d/1asLDGXnPA4K55RfLDGRkgQzOpnKezDoVibWgnGaGUJ0/edit?usp=drivesdk",
"cachedResultName": "n8n_ThaiLetterWithMistralAI"
}
},
"credentials": {
"googleSheetsOAuth2Api": {
"id": "0RVWjnYzlWor2bMu",
"name": "Google Sheets account"
}
},
"typeVersion": 4.4
},
{
"id": "05d85bdd-c642-4a45-a2c9-ffcda27c4906",
"name": "Note adhésive9",
"type": "n8n-nodes-base.stickyNote",
"position": [
-1712,
-32
],
"parameters": {
"color": 2,
"width": 391,
"height": 341,
"content": "### Google Sheets Output\n\n**Append structured data to Google Sheets:**\n\n**Columns:**\n- book_id\n- subject\n- to\n...\n\n**Sheet:** `data` \n**Operation:** `append`\n"
},
"typeVersion": 1
},
{
"id": "c51e40ff-0aab-4c99-84e9-dbaa7ecb01bb",
"name": "Répondre à LINE",
"type": "n8n-nodes-base.httpRequest",
"position": [
-1456,
336
],
"parameters": {
"url": "https://api.line.me/v2/bot/message/reply",
"method": "POST",
"options": {
"response": {
"response": {
"neverError": true
}
}
},
"jsonBody": "={\n \"replyToken\": \"{{ $('LINE Webhook').item.json.body.events[0].replyToken }}\",\n \"messages\": [\n {\n \"type\": \"text\",\n \"text\": \"✅ บันทึกใบหนังสือเรียบร้อยแล้ว!\\n\\n📋 ข้อมูล:\\n เลขที่: {{ $json.book_id }}\\n เรื่อง: {{ $json.subject }}\\n เรียน: {{ $json.to }}\\n ลงวันที่: {{ $json.date }}\\n จาก: {{ $json.signed_by_position }}\\n\\n\"\n }\n ]\n}",
"sendBody": true,
"sendHeaders": true,
"specifyBody": "json",
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"headerParameters": {
"parameters": [
{
"name": "Content-Type",
"value": "application/json"
}
]
}
},
"credentials": {
"httpHeaderAuth": {
"id": "byY3kI23lMe4ewnM",
"name": "Header Auth account - Maid"
}
},
"typeVersion": 4.2
},
{
"id": "076fdad3-6c0b-4812-bdb5-8b13550da89c",
"name": "Note adhésive10",
"type": "n8n-nodes-base.stickyNote",
"position": [
-1712,
320
],
"parameters": {
"color": 4,
"width": 391,
"height": 133,
"content": "### LINE Reply\n\n**Send reply message to LINE user:**\n- Confirm invoice has been saved\n- Include extracted details"
},
"typeVersion": 1
},
{
"id": "1a14bc7a-a7ca-468c-a053-aed3a3a71cb2",
"name": "Vérifier la source pour réponse",
"type": "n8n-nodes-base.if",
"position": [
-2016,
448
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 1,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "condition1",
"operator": {
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $('Merge Data Sources').item.json.source }}",
"rightValue": "line"
}
]
}
},
"typeVersion": 2
},
{
"id": "54929d5d-2f74-4e71-a06b-47051baefca1",
"name": "Extracteur d'informations",
"type": "@n8n/n8n-nodes-langchain.informationExtractor",
"position": [
-2032,
160
],
"parameters": {
"text": "={{ $json.pages[0].markdown }}",
"options": {
"systemPromptTemplate": "You are an expert extraction algorithm.\nOnly extract relevant information from the text.\nIf you do not know the value of an attribute asked to extract, you may omit the attribute's value.\nYou must format your output as raw JSON without any backticks or markdown formatting. Do not include ```json or similar wrappers.\n"
},
"attributes": {
"attributes": [
{
"name": "book_id",
"description": "book id เลขที่หนังสือ"
},
{
"name": "date",
"type": "date",
"description": "วันที่ date"
},
{
"name": "subject",
"description": "subject เรื่อง"
},
{
"name": "to",
"description": "ถึง เรียน to"
},
{
"name": "attach",
"description": "attach เอกสารแนบ หรือ อ้างถึง"
},
{
"name": "detail",
"description": "detail รายละเอียด เนื้อความ ในหนังสือ"
},
{
"name": "signed_by",
"description": "signed_by ลงนาม"
},
{
"name": "contact_phone",
"description": "contact_phone หมายเลขโทรศัพท์ติดต่อ"
},
{
"name": "contact_email",
"description": "contact_email อีเมล์สำหรับการติดต่อ"
},
{
"name": "download_url",
"description": "download_url QR code สำหรับแสกนไฟล์ที่เกี่ยวข้อง"
},
{
"name": "signed_by_position",
"description": "signed_by_position ตำแหน่งผู้ลงนาม ตำแหน่งผู้สั่งการ"
}
]
}
},
"typeVersion": 1.2
},
{
"id": "3d82e9cd-a982-4ad6-8a18-5fecdd3bbfd5",
"name": "Modèle de chat OpenAI",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
-1808,
208
],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "gpt-4o-mini",
"cachedResultName": "gpt-4o-mini"
},
"options": {}
},
"credentials": {
"openAiApi": {
"id": "28LXl50ZdQjnkMJs",
"name": "OpenAi account"
}
},
"typeVersion": 1.2
},
{
"id": "efe1b305-288b-4ea9-a35b-0cd634e2e011",
"name": "Définir les données Drive",
"type": "n8n-nodes-base.set",
"position": [
-2976,
336
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "42960a6d-c039-42f7-9658-22e56159b931",
"name": "source",
"type": "string",
"value": "GDrive"
},
{
"id": "a17844e1-5328-42e6-b67f-d3c6886e1d95",
"name": " fileName",
"type": "string",
"value": "=slip_{{\n $now.format('ddLLyyyyHHmm') }}.{{ $json.fileExtension }}"
},
{
"id": "983bf680-ee70-4c70-8aa9-811cd5b81a04",
"name": "fileId",
"type": "string",
"value": "={{ $json.permissions[1].id }}"
}
]
},
"includeOtherFields": true
},
"typeVersion": 3.4,
"alwaysOutputData": false
},
{
"id": "8067480c-7800-4da7-a195-8e972b01cb5e",
"name": "Déplacer le fichier",
"type": "n8n-nodes-base.googleDrive",
"position": [
-1456,
480
],
"parameters": {
"fileId": {
"__rl": true,
"mode": "id",
"value": "={{ $('Google Drive Trigger').item.json.id }}"
},
"driveId": {
"__rl": true,
"mode": "id",
"value": "1QRfuxVMkw2K_yavR3aPMSQPBnuu7xB2m"
},
"folderId": {
"__rl": true,
"mode": "list",
"value": "root",
"cachedResultName": "/ (Root folder)"
},
"operation": "move"
},
"credentials": {
"googleDriveOAuth2Api": {
"id": "QVrgALkld7whKIgB",
"name": "Google Drive account - Peakwave"
}
},
"typeVersion": 3
},
{
"id": "9ea5b7ae-0a37-4b57-a2ee-259b57cc05ff",
"name": "Note adhésive11",
"type": "n8n-nodes-base.stickyNote",
"position": [
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"parameters": {
"width": 343,
"height": 261,
"content": "### File Source Handling\n\n**Differentiate by file origin:**\n- LINE → Reply with summary\n- Google Drive → Move file to archive folder\n"
},
"typeVersion": 1
},
{
"id": "d66136d7-8145-449a-958b-5498fa6b5a9a",
"name": "Note adhésive12",
"type": "n8n-nodes-base.stickyNote",
"position": [
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"parameters": {
"color": 5,
"width": 391,
"height": 117,
"content": "### Google Drive Move Folder\n\n**Organize processed files:**\n- Move to archive/storage folder\n"
},
"typeVersion": 1
},
{
"id": "beb6d82a-27f7-4960-876a-90de2b5f76dc",
"name": "Extraire le texte IMG",
"type": "n8n-nodes-base.mistralAi",
"position": [
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160
],
"parameters": {
"options": {},
"documentType": "image_url",
"binaryProperty": "=data"
},
"credentials": {
"mistralCloudApi": {
"id": "NRWMHtENxW6uNq4e",
"name": "Mistral Cloud account"
}
},
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},
{
"id": "407ee96d-ba16-4afb-ab0f-fdf3cdb95e4a",
"name": "Extraire le texte PDF",
"type": "n8n-nodes-base.mistralAi",
"position": [
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"parameters": {
"options": {},
"binaryProperty": "=data"
},
"credentials": {
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"name": "Mistral Cloud account"
}
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"active": false,
"pinData": {},
"settings": {
"executionOrder": "v1"
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"versionId": "2e25c95f-23fe-4e12-9697-9c9c1a8503bf",
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},
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"ai_languageModel": [
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},
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},
"1a14bc7a-a7ca-468c-a053-aed3a3a71cb2": {
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}Foire aux questions
Comment utiliser ce workflow ?
Copiez le code de configuration JSON ci-dessus, créez un nouveau workflow dans votre instance n8n et sélectionnez "Importer depuis le JSON", collez la configuration et modifiez les paramètres d'authentification selon vos besoins.
Dans quelles scénarios ce workflow est-il adapté ?
Avancé - Extraction de documents, Résumé IA
Est-ce payant ?
Ce workflow est entièrement gratuit et peut être utilisé directement. Veuillez noter que les services tiers utilisés dans le workflow (comme l'API OpenAI) peuvent nécessiter un paiement de votre part.
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Niveau de difficulté
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Nombre de nœuds29
Catégorie2
Types de nœuds12
Description de la difficulté
Auteur
Jaruphat J.
@jaruphatjProject Manager who passionate about Automation & AI and continuously explore innovative ways to improve business processes through intelligent workflow automation. Let’s connect and automate the future!
Liens externes
Voir sur n8n.io →
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