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使用 Azure GPT-4.1 和人工验证自动处理 Gmail 中的发票

高级

这是一个Invoice Processing, AI Summarization领域的自动化工作流,包含 17 个节点。主要使用 If, Gmail, Merge, GmailTrigger, StopAndError 等节点。 通过 Azure GPT-4.1 和人工验证实现 Gmail 发票处理的自动化

前置要求
  • Google 账号和 Gmail API 凭证
  • OpenAI API Key
工作流预览
可视化展示节点连接关系,支持缩放和平移
导出工作流
复制以下 JSON 配置到 n8n 导入,即可使用此工作流
{
  "id": "zZWPMtZ0TNebe1fI",
  "meta": {
    "instanceId": "9d85a8cf5ffde86dc8ca46087fd639ee7966eec2fa01c3b00004cfc2bd9c91b0"
  },
  "name": "Automate Invoice Processing from Gmail with Azure GPT-4.1 and Human Verification",
  "tags": [],
  "nodes": [
    {
      "id": "a6fd1034-16ac-48ce-a20e-5d00f9709d76",
      "name": "Gmail Trigger",
      "type": "n8n-nodes-base.gmailTrigger",
      "position": [
        40,
        220
      ],
      "parameters": {
        "simple": false,
        "filters": {
          "sender": "youremail@gmail.com"
        },
        "options": {
          "downloadAttachments": true
        },
        "pollTimes": {
          "item": [
            {
              "mode": "everyMinute"
            }
          ]
        }
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "T2T44GgzbxyaFB0y",
          "name": "Gmail account"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "b4829627-2c3e-477c-8ff0-9754f0010826",
      "name": "IF: AI Says Yes",
      "type": "n8n-nodes-base.if",
      "position": [
        1020,
        260
      ],
      "parameters": {
        "conditions": {
          "string": [
            {
              "value1": "={{ $json.output[0].insights[0].body }}",
              "value2": "Yes",
              "operation": "contains"
            }
          ]
        }
      },
      "typeVersion": 1
    },
    {
      "id": "14933a59-1cd2-4572-aa92-8968ffa03b8a",
      "name": "Save PDF Locally",
      "type": "n8n-nodes-base.writeBinaryFile",
      "position": [
        1640,
        220
      ],
      "parameters": {
        "options": {},
        "fileName": "=C:/Test/Invoices/invoice_{{ $now.toFormat('yyyyLLdd_HHmmss') }}.pdf",
        "dataPropertyName": "attachment_0"
      },
      "typeVersion": 1
    },
    {
      "id": "0a17eed9-be81-4576-b218-ad12b3ffac28",
      "name": "Merge",
      "type": "n8n-nodes-base.merge",
      "position": [
        1480,
        220
      ],
      "parameters": {
        "mode": "chooseBranch"
      },
      "retryOnFail": false,
      "typeVersion": 3.2
    },
    {
      "id": "e577ce73-0505-45f0-80cb-aa6d241f1add",
      "name": "Information Extractor",
      "type": "@n8n/n8n-nodes-langchain.informationExtractor",
      "onError": "continueErrorOutput",
      "position": [
        660,
        280
      ],
      "parameters": {
        "text": "={{ $json.text }}",
        "options": {
          "systemPromptTemplate": "You are an expert reviewing invoices. Analyze the texts and say if it is an invoice. Just answer 'Yes' or 'No'"
        },
        "schemaType": "manual",
        "inputSchema": "{\n  \"type\": \"array\",\n  \"items\": {\n    \"type\": \"object\",\n     \"properties\": {\n       \"topic\": { \"type\": \"string\" },\n       \"insights\": {\n         \"type\": \"array\",\n         \"items\": {\n           \"type\": \"object\",\n           \"properties\": {\n             \"title\": { \"type\": \"string\" },\n             \"body\": { \"type\": \"string\" }\n           }\n         }\n       }\n     }\n  }\n}"
      },
      "typeVersion": 1.2,
      "alwaysOutputData": true
    },
    {
      "id": "861f5008-bd46-4091-b040-b7b2fe1e6f45",
      "name": "Is this PDF?",
      "type": "n8n-nodes-base.if",
      "position": [
        260,
        220
      ],
      "parameters": {
        "conditions": {
          "string": [
            {
              "value1": "={{ $json.subject }}",
              "value2": "Invoice",
              "operation": "contains"
            },
            {
              "value1": "={{ $binary.attachment_0 }}",
              "operation": "isNotEmpty"
            }
          ]
        }
      },
      "typeVersion": 1,
      "alwaysOutputData": true
    },
    {
      "id": "e23bf999-1718-4489-a308-e244b22e14ad",
      "name": "Send a message",
      "type": "n8n-nodes-base.gmail",
      "position": [
        1020,
        480
      ],
      "webhookId": "aaafea40-4fcd-4775-82bf-5302914a681b",
      "parameters": {
        "sendTo": "receiver@gmail.com",
        "message": "I had trouble parsing the recent invoice. Can you please confirm that it is an invoice?",
        "options": {
          "appendAttribution": false
        },
        "subject": "Approval Required!",
        "operation": "sendAndWait",
        "approvalOptions": {
          "values": {
            "approvalType": "double"
          }
        }
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "T2T44GgzbxyaFB0y",
          "name": "Gmail account"
        }
      },
      "typeVersion": 2.1
    },
    {
      "id": "bc2a8732-2e5f-421b-8df1-37a6ec2f7a2e",
      "name": "Invoice Saved Message",
      "type": "n8n-nodes-base.gmail",
      "position": [
        1800,
        220
      ],
      "webhookId": "aaafea40-4fcd-4775-82bf-5302914a681b",
      "parameters": {
        "sendTo": "receiver@gmail.com",
        "message": "=Hi there,\nInvoice '{{ $json.subject }}' from \"{{ $json.from.value[0].name }}\" has been saved successfully in your Local Folder!\n\n",
        "options": {
          "appendAttribution": false
        },
        "subject": "=Invoice Downloaded"
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "T2T44GgzbxyaFB0y",
          "name": "Gmail account"
        }
      },
      "typeVersion": 2.1
    },
    {
      "id": "c9155103-6c04-438a-8e90-edb63b9ffd1a",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        0,
        120
      ],
      "parameters": {
        "color": 7,
        "width": 200,
        "height": 300,
        "content": "Triggers Gmail when new email from specific email account is received.\n"
      },
      "typeVersion": 1
    },
    {
      "id": "a7a4385d-f00e-493c-9757-fbd660a64354",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        220,
        120
      ],
      "parameters": {
        "color": 7,
        "width": 180,
        "height": 300,
        "content": "Checks if there is any pdf attachments in email, and Invoice is included in subject\n"
      },
      "typeVersion": 1
    },
    {
      "id": "da0c4d5e-9c24-4f3d-a17a-ca92d3299729",
      "name": "Sticky Note2",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        420,
        0
      ],
      "parameters": {
        "color": 7,
        "width": 180,
        "height": 600,
        "content": "If both are true, it extracts the information from the pdf.\n\nIf not, it gives an error saying that there is no invoice file included."
      },
      "typeVersion": 1
    },
    {
      "id": "2196f52f-9e5b-4acd-b173-86ff7e986b71",
      "name": "Sticky Note3",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        620,
        0
      ],
      "parameters": {
        "color": 7,
        "width": 780,
        "height": 660,
        "content": "This checks the extracted information from the pdf and analyze if it is invoice.\n\nBased on the information, if it is invoice, it gives output of \"Yes\", otherwise \"No\".\n\nIf \"Yes\", it merges response to another node.\nIf \"No\", it sends an email to person and says that the file does not seem like an invoice and double check the file for review. When human responds that it is an invoice, it corrects its answer as \"Yes\".\n\nIf there is an error parsing the extracted texts, it sends an email to user to check the file and asks for approval."
      },
      "typeVersion": 1
    },
    {
      "id": "ba5b7574-a2e1-401e-aab0-c7ca6b7856d8",
      "name": "Azure OpenAI Chat Model",
      "type": "@n8n/n8n-nodes-langchain.lmChatAzureOpenAi",
      "position": [
        660,
        440
      ],
      "parameters": {
        "model": "gpt-4.1",
        "options": {}
      },
      "credentials": {
        "azureOpenAiApi": {
          "id": "QvYBe8DtpxGloSPZ",
          "name": "Azure Open AI account"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "42973f72-4ce9-4fff-90e5-9a09cc68f39b",
      "name": "Manual Verification",
      "type": "n8n-nodes-base.gmail",
      "position": [
        1200,
        340
      ],
      "webhookId": "69f41f8b-bad8-4fe6-83db-b46e64f10e7f",
      "parameters": {
        "sendTo": "receiveremail@gmail.com",
        "message": "The latest invoice does not seem to be legit. Please verify it manually.",
        "options": {
          "appendAttribution": false
        },
        "subject": "Manual Verification Required"
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "T2T44GgzbxyaFB0y",
          "name": "Gmail account"
        }
      },
      "typeVersion": 2.1
    },
    {
      "id": "f1d15106-d677-4484-8602-7091c87be5c7",
      "name": "Sticky Note4",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        1420,
        120
      ],
      "parameters": {
        "color": 7,
        "width": 560,
        "height": 300,
        "content": "After verifying that the file is an invoice, it saves the file in the local directory. When the workflow is completed, it sends a success email to user."
      },
      "typeVersion": 1
    },
    {
      "id": "f589f451-3faf-4930-ab12-4796f219d066",
      "name": "Sticky Note5",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        0,
        0
      ],
      "parameters": {
        "width": 400,
        "height": 100,
        "content": "## Use this to automatically save invoice received in an email"
      },
      "typeVersion": 1
    },
    {
      "id": "3b021445-e52e-4191-a454-654ba26e1bba",
      "name": "Error Handler",
      "type": "n8n-nodes-base.stopAndError",
      "position": [
        460,
        440
      ],
      "parameters": {
        "errorMessage": "There is no pdf file!"
      },
      "typeVersion": 1
    }
  ],
  "active": false,
  "pinData": {},
  "settings": {
    "executionOrder": "v1"
  },
  "versionId": "a74dc17a-a9fe-448e-a457-4b267ce63830",
  "connections": {
    "0a17eed9-be81-4576-b218-ad12b3ffac28": {
      "main": [
        [
          {
            "node": "14933a59-1cd2-4572-aa92-8968ffa03b8a",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "861f5008-bd46-4091-b040-b7b2fe1e6f45": {
      "main": [
        [
          {
            "node": "0a17eed9-be81-4576-b218-ad12b3ffac28",
            "type": "main",
            "index": 0
          },
          {
            "node": "e577ce73-0505-45f0-80cb-aa6d241f1add",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "3b021445-e52e-4191-a454-654ba26e1bba",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "a6fd1034-16ac-48ce-a20e-5d00f9709d76": {
      "main": [
        [
          {
            "node": "861f5008-bd46-4091-b040-b7b2fe1e6f45",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "b4829627-2c3e-477c-8ff0-9754f0010826": {
      "main": [
        [
          {
            "node": "0a17eed9-be81-4576-b218-ad12b3ffac28",
            "type": "main",
            "index": 1
          }
        ],
        [
          {
            "node": "42973f72-4ce9-4fff-90e5-9a09cc68f39b",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "14933a59-1cd2-4572-aa92-8968ffa03b8a": {
      "main": [
        [
          {
            "node": "bc2a8732-2e5f-421b-8df1-37a6ec2f7a2e",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "e577ce73-0505-45f0-80cb-aa6d241f1add": {
      "main": [
        [
          {
            "node": "b4829627-2c3e-477c-8ff0-9754f0010826",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "e23bf999-1718-4489-a308-e244b22e14ad",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "ba5b7574-a2e1-401e-aab0-c7ca6b7856d8": {
      "ai_languageModel": [
        [
          {
            "node": "e577ce73-0505-45f0-80cb-aa6d241f1add",
            "type": "ai_languageModel",
            "index": 0
          }
        ]
      ]
    }
  }
}
常见问题

如何使用这个工作流?

复制上方的 JSON 配置代码,在您的 n8n 实例中创建新工作流并选择「从 JSON 导入」,粘贴配置后根据需要修改凭证设置即可。

这个工作流适合什么场景?

高级 - 发票处理, AI 摘要总结

需要付费吗?

本工作流完全免费,您可以直接导入使用。但请注意,工作流中使用的第三方服务(如 OpenAI API)可能需要您自行付费。

工作流信息
难度等级
高级
节点数量17
分类2
节点类型9
难度说明

适合高级用户,包含 16+ 个节点的复杂工作流

外部链接
在 n8n.io 查看

分享此工作流

分类

分类: 34