{ "name": "Invoice Extractor", "nodes": [ { "parameters": { "pollTimes": { "item": [ { "mode": "everyMinute" } ] }, "simple": false, "filters": {}, "options": { "downloadAttachments": true } }, "id": "8a59b4d3-2da2-4617-8e77-8e7c90b69035", "name": "Gmail Trigger", "type": "n8n-nodes-base.gmailTrigger", "typeVersion": 1.1, "position": [ -1680, 120 ], "credentials": { "gmailOAuth2": { "id": "iSAipyI2YPiTmbrF", "name": "Gmail account 2" } } }, { "parameters": { "conditions": { "options": { "caseSensitive": true, "leftValue": "", "typeValidation": "strict", "version": 2 }, "conditions": [ { "id": "bcabd7f1-8724-4cc5-879b-21a0a0633f57", "leftValue": "={{ $('Gmail Trigger').item.binary}}", "rightValue": "", "operator": { "type": "object", "operation": "exists", "singleValue": true } } ], "combinator": "and" }, "options": {} }, "id": "9d1b4d73-9a44-480a-a92b-dc1271abcc60", "name": "Filter", "type": "n8n-nodes-base.filter", "typeVersion": 2.2, "position": [ -1480, 120 ] }, { "parameters": { "operation": "get", "messageId": "={{ $json.id }}", "simple": false, "options": { "downloadAttachments": true } }, "id": "dc9804b5-4a40-4f74-afe5-212b9ffcb9e2", "name": "Gmail", "type": "n8n-nodes-base.gmail", "typeVersion": 2.1, "position": [ -1300, 120 ], "webhookId": "c28b4620-11ac-4745-8ce6-f023dfa13173", "credentials": { "gmailOAuth2": { "id": "iSAipyI2YPiTmbrF", "name": "Gmail account 2" } } }, { "parameters": { "fieldToSplitOut": "attachments", "include": "allOtherFields", "options": {} }, "id": "e7a336d2-3d37-431e-bcd9-59d18a3bb7f2", "name": "Split Out", "type": "n8n-nodes-base.splitOut", "typeVersion": 1, "position": [ -920, 340 ] }, { "parameters": { "options": {} }, "id": "b1ce8ce1-1e78-4854-ac7e-4ffdf75d786e", "name": "OpenAI Chat Model", "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi", "typeVersion": 1, "position": [ -140, 320 ], "credentials": { "openAiApi": { "id": "DBpeXA2IXrXK46lj", "name": "n8n free OpenAI API credits" } } }, { "parameters": { "schemaType": "manual", "inputSchema": "{\n \"invoice_name\": \"Invoice name here\",\n \"company_name\": \"Company name that sent the invoice\",\n \"total_invoice_amount\": 1000,\n \"items\": [\n {\n \"description\": \"item description\",\n \"amount\": 100\n },\n {\n \"description\": \"item description\",\n \"amount\": 800\n },\n {\n \"description\": \"item description\",\n \"amount\": 100\n }\n ]\n}\n" }, "id": "8d20046e-7a16-47fd-94e0-c2a58a1331ee", "name": "Structured Output Parser", "type": "@n8n/n8n-nodes-langchain.outputParserStructured", "typeVersion": 1.2, "position": [ 60, 340 ] }, { "parameters": { "options": { "reset": false } }, "id": "5be8b89f-c609-4127-b5a9-44b62208512c", "name": "Loop Over Items", "type": "n8n-nodes-base.splitInBatches", "typeVersion": 3, "position": [ 700, 100 ] }, { "parameters": { "operation": "create", "base": { "__rl": true, "value": "appN1tvHeujEE764G", "mode": "list", "cachedResultName": "Invoice Automation", "cachedResultUrl": "https://airtable.com/appN1tvHeujEE764G" }, "table": { "__rl": true, "value": "tblOYaUHnHH1h8esU", "mode": "list", "cachedResultName": "invoices", "cachedResultUrl": "https://airtable.com/appN1tvHeujEE764G/tblOYaUHnHH1h8esU" }, "columns": { "mappingMode": "defineBelow", "value": { "email_subject": "={{ $('Gmail').item.json.headers.subject }}", "email": "={{ $('Gmail').item.json.to.value[0].address}}", "invoice_link": "={{ $('Upload to Drive').item.json.webViewLink }}", "amount": "={{ $json.output.total_invoice_amount }}", "company_name": "={{ $json.output.company_name }}", "invoice_name": "={{ $json.output.invoice_name }}" }, "matchingColumns": [], "schema": [ { "id": "email_subject", "displayName": "email_subject", "required": false, "defaultMatch": false, "canBeUsedToMatch": true, "display": true, "type": "string", "readOnly": false, "removed": false }, { "id": "email", "displayName": "email", "required": false, "defaultMatch": false, "canBeUsedToMatch": true, "display": true, "type": "string", "readOnly": false, "removed": false }, { "id": "invoice_link", "displayName": "invoice_link", "required": false, "defaultMatch": false, "canBeUsedToMatch": true, "display": true, "type": "string", "readOnly": false, "removed": false }, { "id": "amount", "displayName": "amount", "required": false, "defaultMatch": false, "canBeUsedToMatch": true, "display": true, "type": "number", "readOnly": false, "removed": false }, { "id": "company_name", "displayName": "company_name", "required": false, "defaultMatch": false, "canBeUsedToMatch": true, "display": true, "type": "string", "readOnly": false, "removed": false }, { "id": "invoice_name", "displayName": "invoice_name", "required": false, "defaultMatch": false, "canBeUsedToMatch": true, "display": true, "type": "string", "readOnly": false, "removed": false } ], "attemptToConvertTypes": false, "convertFieldsToString": false }, "options": {} }, "id": "2a22a6c1-dcad-4aad-b615-e4178f209d7d", "name": "Add invoice", "type": "n8n-nodes-base.airtable", "typeVersion": 2.1, "position": [ 220, 100 ], "credentials": { "airtableTokenApi": { "id": "sqO5ueXPaoMEQImm", "name": "Airtable Personal Access Token account" } } }, { "parameters": { "fieldToSplitOut": "items", "include": "allOtherFields", "options": {} }, "id": "3dbf9d04-7130-46b5-a327-4d31c58a81a4", "name": "Split Out1", "type": "n8n-nodes-base.splitOut", "typeVersion": 1, "position": [ 540, 100 ] }, { "parameters": { "mode": "combine", "advanced": true, "mergeByFields": { "values": [ { "field1": "message_id", "field2": "id" } ] }, "options": {} }, "id": "f58be78d-acf2-4566-a437-5aa497922bd3", "name": "Merge", "type": "n8n-nodes-base.merge", "typeVersion": 3, "position": [ -800, 100 ] }, { "parameters": {}, "id": "f7d4d044-3290-4901-81d8-9d61ca094426", "name": "Do nothing", "type": "n8n-nodes-base.noOp", "typeVersion": 1, "position": [ 1120, 80 ] }, { "parameters": { "assignments": { "assignments": [ { "id": "e97eab44-68f4-4e8f-930a-29636efab1a5", "name": "attachments", "value": "={{ $('Gmail').item.binary.keys() }}", "type": "array" }, { "id": "6f9ba742-3ae1-4c8b-9bed-57da6431032f", "name": "message_id", "value": "={{ $json.id }}", "type": "string" } ] }, "options": {} }, "id": "9078eb82-f352-4d5f-88e9-d470736f6200", "name": "Attachment", "type": "n8n-nodes-base.set", "typeVersion": 3.4, "position": [ -1140, 340 ] }, { "parameters": { "assignments": { "assignments": [ { "id": "eeb0920a-9d4c-441c-94a3-9ab6dec3092b", "name": "=items", "value": "={{ $('Invoice Extractor').item.json.output.items }}", "type": "array" }, { "id": "ff34ba6a-5631-4103-a779-47d2c2012bdb", "name": "invoice_id", "value": "={{ $json.id }}", "type": "string" } ] }, "options": {} }, "id": "3e2c3b32-c941-48db-bf21-af45b1465907", "name": "Set Invoice ID", "type": "n8n-nodes-base.set", "typeVersion": 3.4, "position": [ 400, 100 ] }, { "parameters": { "operation": "pdf", "options": {} }, "id": "711134c3-1c4b-488d-b400-1e09acc2c3d4", "name": "Extract PDF", "type": "n8n-nodes-base.extractFromFile", "typeVersion": 1, "position": [ -280, 100 ] }, { "parameters": { "operation": "download", "fileId": { "__rl": true, "value": "={{ $json.id }}", "mode": "id" }, "options": {} }, "id": "6574b14d-8949-4306-b03f-ed474ab316c4", "name": "Download Binary", "type": "n8n-nodes-base.googleDrive", "typeVersion": 3, "position": [ -440, 100 ], "credentials": { "googleDriveOAuth2Api": { "id": "WwJf6x4DkHV3hPuf", "name": "Google Drive account" } } }, { "parameters": { "promptType": "define", "text": "=You will receive text extracted from PDF invoices.\n\nYour objective is to identify and extract key details from these invoices and structure them accordingly. The required details are:\n\n1.Invoice Name – The identifier or title of the invoice.\n2.Company Name – The name of the issuing company.\n3.Total Invoice Amount – The overall amount stated on the invoice.\n4.Items – A detailed breakdown of charges, including each item’s description and corresponding amount.\nEnsure accuracy in the extracted details and format the output as follows:\n\n{\n \"invoice_name\": \"Invoice name here\",\n \"company_name\": \"Company name that sent the invoice\",\n \"total_invoice_amount\": 1000,\n \"items\": [\n {\n \"description\": \"item description\",\n \"amount\": 100\n },\n {\n \"description\": \"item description\",\n \"amount\": 800\n },\n {\n \"description\": \"item description\",\n \"amount\": 100\n }\n ]\n}\n\n\nAdditional Guidelines:\n\nIf any required field is missing or unclear, provide the most accurate estimate possible or set the field to null.\n\nEnsure each item has a meaningful description rather than generic labels like \"item_1\"—use product or service names when available.\n\nVerify that the sum of all item amounts matches the total invoice amount for consistency.\n\nInvoice Text to Process:\n{{ $json.text }}", "hasOutputParser": true }, "id": "3dfb6acb-bde6-44e2-961c-983b639238cf", "name": "Invoice Extractor", "type": "@n8n/n8n-nodes-langchain.chainLlm", "typeVersion": 1.4, "position": [ -120, 100 ] }, { "parameters": { "inputDataFieldName": "={{ $json.attachments }}", "name": "={{ $('Gmail').item.json.subject }}_{{ $('Merge').item.json.attachments }}", "driveId": { "__rl": true, "value": "My Drive", "mode": "list", "cachedResultName": "My Drive", "cachedResultUrl": "https://drive.google.com/drive/my-drive" }, "folderId": { "__rl": true, "value": "1RL25a2CY9Zbc8_fqgUamjZrfFsbyIbk_", "mode": "list", "cachedResultName": "N8N Templates", "cachedResultUrl": "https://drive.google.com/drive/folders/1RL25a2CY9Zbc8_fqgUamjZrfFsbyIbk_" }, "options": {} }, "id": "0a7245e2-cb22-472a-a484-98c1bb1a59b3", "name": "Upload to Drive", "type": "n8n-nodes-base.googleDrive", "typeVersion": 3, "position": [ -640, 100 ], "retryOnFail": true, "credentials": { "googleDriveOAuth2Api": { "id": "WwJf6x4DkHV3hPuf", "name": "Google Drive account" } } }, { "parameters": { "operation": "create", "base": { "__rl": true, "value": "appN1tvHeujEE764G", "mode": "list", "cachedResultName": "Invoice Management", "cachedResultUrl": "https://airtable.com/appN1tvHeujEE764G" }, "table": { "__rl": true, "value": "tblsD9wS7MEVAj66s", "mode": "list", "cachedResultName": "invoice_items", "cachedResultUrl": "https://airtable.com/appN1tvHeujEE764G/tblsD9wS7MEVAj66s" }, "columns": { "mappingMode": "defineBelow", "value": { "invoice": "={{ $json.subject_id }}", "amount": "={{ $json.items.amount }}", "item": "={{ $json.items.description }}" }, "matchingColumns": [], "schema": [ { "id": "item", "displayName": "item", "required": false, "defaultMatch": false, "canBeUsedToMatch": true, "display": true, "type": "string", "readOnly": false, "removed": false }, { "id": "amount", "displayName": "amount", "required": false, "defaultMatch": false, "canBeUsedToMatch": true, "display": true, "type": "number", "readOnly": false, "removed": false }, { "id": "invoice", "displayName": "invoice", "required": false, "defaultMatch": false, "canBeUsedToMatch": true, "display": true, "type": "string", "readOnly": false, "removed": false } ], "attemptToConvertTypes": false, "convertFieldsToString": false }, "options": {} }, "id": "b6fd667a-f508-4a69-a49e-a54567696feb", "name": "Add Items", "type": "n8n-nodes-base.airtable", "typeVersion": 2.1, "position": [ 1120, 280 ], "credentials": { "airtableTokenApi": { "id": "sqO5ueXPaoMEQImm", "name": "Airtable Personal Access Token account" } } } ], "pinData": {}, "connections": { "Gmail Trigger": { "main": [ [ { "node": "Filter", "type": "main", "index": 0 } ] ] }, "Filter": { "main": [ [ { "node": "Gmail", "type": "main", "index": 0 } ] ] }, "Gmail": { "main": [ [ { "node": "Attachment", "type": "main", "index": 0 }, { "node": "Merge", "type": "main", "index": 1 } ] ] }, "Split Out": { "main": [ [ { "node": "Merge", "type": "main", "index": 0 } ] ] }, "OpenAI Chat Model": { "ai_languageModel": [ [ { "node": "Invoice Extractor", "type": "ai_languageModel", "index": 0 } ] ] }, "Structured Output Parser": { "ai_outputParser": [ [ { "node": "Invoice Extractor", "type": "ai_outputParser", "index": 0 } ] ] }, "Loop Over Items": { "main": [ [ { "node": "Do nothing", "type": "main", "index": 0 } ], [ { "node": "Add Items", "type": "main", "index": 0 } ] ] }, "Add invoice": { "main": [ [ { "node": "Set Invoice ID", "type": "main", "index": 0 } ] ] }, "Split Out1": { "main": [ [ { "node": "Loop Over Items", "type": "main", "index": 0 } ] ] }, "Merge": { "main": [ [ { "node": "Upload to Drive", "type": "main", "index": 0 } ] ] }, "Attachment": { "main": [ [ { "node": "Split Out", "type": "main", "index": 0 } ] ] }, "Set Invoice ID": { "main": [ [ { "node": "Split Out1", "type": "main", "index": 0 } ] ] }, "Extract PDF": { "main": [ [ { "node": "Invoice Extractor", "type": "main", "index": 0 } ] ] }, "Download Binary": { "main": [ [ { "node": "Extract PDF", "type": "main", "index": 0 } ] ] }, "Invoice Extractor": { "main": [ [ { "node": "Add invoice", "type": "main", "index": 0 } ] ] }, "Upload to Drive": { "main": [ [ { "node": "Download Binary", "type": "main", "index": 0 } ] ] }, "Add Items": { "main": [ [ { "node": "Loop Over Items", "type": "main", "index": 0 } ] ] } }, "active": false, "settings": { "executionOrder": "v1" }, "versionId": "69d1ce0b-7a9c-48de-8b45-e89f1d657660", "meta": { "templateCredsSetupCompleted": true, "instanceId": "ae59e6b831344dba624c99cbe778a4bc47150f8e64de86a8011d15bac8e58c21" }, "id": "hweSczpiLZKAGaNv", "tags": [] }