{
  "workflow": {
    "id": 4057,
    "name": "Auto-respond to Gmail enquiries using GPT-4o, Dumpling AI & LangChain agent",
    "views": 10310,
    "recentViews": 2,
    "totalViews": 10310,
    "createdAt": "2025-05-14T21:06:14.263Z",
    "description": "\n\n### Who is this for?\n\nThis workflow is perfect for customer support teams, sales departments, or solopreneurs who receive frequent email enquiries and want to automate the initial response process using AI. If you spend too much time answering similar questions, this system helps respond faster and more intelligently—without writing a single line of code.\n\n---\n\n### What problem is this workflow solving?\n\nManually responding to repeated customer enquiries slows productivity and increases delay. This workflow classifies if an incoming email is a real enquiry, analyzes the content with a LangChain-powered agent, fetches helpful context using Dumpling AI, and sends a personalized reply using Gmail—all within minutes.\n\n---\n\n### What this workflow does\n\n1. **Listens for new incoming Gmail messages** using the Gmail Trigger node.  \n2. **Classifies whether the email is an enquiry** using a GPT-4o classification prompt.  \n3. **Uses a Filter node** to continue only if the email was classified as an enquiry.  \n4. **Passes the email content to a LangChain Agent**, enhanced with memory, AI tools, and Dumpling AI to search for relevant information.  \n5. **The agent constructs a smart, relevant response**, then sends it to the original sender via Gmail.\n\n---\n\n### Setup\n\n1. **Connect Gmail**  \n   - Use the Gmail Trigger node to connect to the Gmail account that receives enquiries.  \n   - Make sure Gmail OAuth2 credentials are authenticated.\n\n2. **Configure Dumpling AI Agent**  \n   - Sign up at [Dumpling AI](https://www.dumplingai.com/).  \n   - Create an agent trained to search your help docs, site content, or FAQs.  \n   - Copy your Dumpling agent ID and API key.  \n   - Paste it in the `Dumpling AI Agent – Search for Relevant Info` HTTP Request node.\n\n3. **Set Up LangChain Agent**  \n   - No extra setup needed beyond connecting OpenAI credentials.  \n   - GPT-4o is used for classification and reply generation.\n\n4. **Enable Gmail Reply Node**  \n   - The final `Send Email Response via Gmail` node will send the AI-generated reply back to the same thread.\n\n---\n\n### How to customize this workflow to your needs\n\n- Change the classification prompt to include other email types like “support”, “complaint”, or “sales”.  \n- Add additional logic if you want to CC someone or forward certain types of enquiries.  \n- Add a Notion or Google Sheets node to log the conversation for analytics.  \n- Replace Gmail with Outlook or another email provider by switching the nodes.  \n- Improve context by adding more AI tools like database queries or preloaded FAQs.\n",
    "workflow": {
      "id": "uQTqLH5At9PZOy2g",
      "meta": {
        "instanceId": "a1ae5c8dc6c65e674f9c3947d083abcc749ef2546dff9f4ff01de4d6a36ebfe6",
        "templateCredsSetupCompleted": true
      },
      "name": "Auto-Respond to Gmail Enquiries using GPT-4o, Dumpling AI & LangChain Agent",
      "tags": [],
      "nodes": [
        {
          "id": "149c7dd9-9f5f-4c5b-8342-7c907eb52402",
          "name": "Watch Gmail for New Incoming Emails",
          "type": "n8n-nodes-base.gmailTrigger",
          "position": [
            -2300,
            -340
          ],
          "parameters": {
            "filters": {},
            "pollTimes": {
              "item": [
                {
                  "mode": "everyMinute"
                }
              ]
            }
          },
          "credentials": {
            "gmailOAuth2": {
              "id": "credential-id",
              "name": "gmailOAuth2 Credential"
            }
          },
          "typeVersion": 1.2
        },
        {
          "id": "8a0de384-9028-47e3-86e5-b5bf6476ae0c",
          "name": "Classify Email Type with GPT-4o",
          "type": "@n8n/n8n-nodes-langchain.openAi",
          "position": [
            -2080,
            -340
          ],
          "parameters": {
            "modelId": {
              "__rl": true,
              "mode": "list",
              "value": "gpt-4o",
              "cachedResultName": "GPT-4O"
            },
            "options": {},
            "messages": {
              "values": [
                {
                  "content": "=Classify the following email content. Determine if it is an enquiry.\nIf it is an enquiry, return only this word: enquiry\nIf it is not an enquiry, return only this word: false\nDo not explain or add any other text. Only return the result.\nHere is the email body: {{ $json.snippet }}"
                }
              ]
            }
          },
          "credentials": {
            "openAiApi": {
              "id": "credential-id",
              "name": "openAiApi Credential"
            }
          },
          "typeVersion": 1.8
        },
        {
          "id": "57756cd3-9009-4189-8cba-e2edba87554f",
          "name": " Only Proceed if Email is an Enquiry",
          "type": "n8n-nodes-base.filter",
          "position": [
            -1704,
            -340
          ],
          "parameters": {
            "options": {},
            "conditions": {
              "options": {
                "version": 2,
                "leftValue": "",
                "caseSensitive": true,
                "typeValidation": "strict"
              },
              "combinator": "and",
              "conditions": [
                {
                  "id": "e6019006-0980-4cd6-8e5d-3f618fbca13a",
                  "operator": {
                    "name": "filter.operator.equals",
                    "type": "string",
                    "operation": "equals"
                  },
                  "leftValue": "={{ $json.message.content }}",
                  "rightValue": "enquiry"
                }
              ]
            }
          },
          "typeVersion": 2.2
        },
        {
          "id": "64e851b8-7ff1-4b4c-9828-7c764594f1ea",
          "name": "GPT-4o Chat Model",
          "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
          "position": [
            -1484,
            -120
          ],
          "parameters": {
            "model": {
              "__rl": true,
              "mode": "list",
              "value": "gpt-4o-mini"
            },
            "options": {}
          },
          "credentials": {
            "openAiApi": {
              "id": "credential-id",
              "name": "openAiApi Credential"
            }
          },
          "typeVersion": 1.2
        },
        {
          "id": "2957c6ad-5e7b-4692-a96f-5c4fb5b8203c",
          "name": "Memory Buffer (Past 10 Interactions)",
          "type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
          "position": [
            -1364,
            -120
          ],
          "parameters": {
            "contextWindowLength": 10
          },
          "typeVersion": 1.3
        },
        {
          "id": "9e8617f1-cd89-4de5-9d44-ded155779745",
          "name": "Dumpling AI Agent – Search for Relevant Info",
          "type": "@n8n/n8n-nodes-langchain.toolHttpRequest",
          "position": [
            -1244,
            -120
          ],
          "parameters": {
            "url": "https://app.dumplingai.com/api/v1/agents/generate-completion",
            "method": "POST",
            "jsonBody": "={\n  \"messages\": [\n    {\n      \"role\": \"user\",\n      \"content\":\"{{ $('Watch Gmail for New Incoming Emails').item.json.snippet }}\"\n    }\n  ],\n  \"agentId\": \"a88a9b6c-1578-4da2-800b-561327367713\",\n  \"parseJson\": \"True\"\n  }",
            "sendBody": true,
            "specifyBody": "json",
            "authentication": "genericCredentialType",
            "genericAuthType": "httpHeaderAuth"
          },
          "credentials": {
            "httpHeaderAuth": {
              "id": "credential-id",
              "name": "httpHeaderAuth Credential"
            }
          },
          "typeVersion": 1.1
        },
        {
          "id": "da474406-a6e3-427d-b21b-3e7e00ebe910",
          "name": "Send Email Response via Gmail",
          "type": "n8n-nodes-base.gmailTool",
          "position": [
            -1124,
            -120
          ],
          "webhookId": "b39f740b-77d1-426a-a07a-186a9ff0c1af",
          "parameters": {
            "sendTo": "",
            "message": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('Message', ``, 'string') }}",
            "options": {},
            "subject": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('Subject', ``, 'string') }}"
          },
          "credentials": {
            "gmailOAuth2": {
              "id": "credential-id",
              "name": "gmailOAuth2 Credential"
            }
          },
          "typeVersion": 2.1
        },
        {
          "id": "03882650-9272-43c3-b1bc-15adae456881",
          "name": "LangChain Agent Handles Reply Logic",
          "type": "@n8n/n8n-nodes-langchain.agent",
          "position": [
            -1392,
            -340
          ],
          "parameters": {
            "text": "={{ $('Watch Gmail for New Incoming Emails').item.json.snippet }}",
            "options": {
              "systemMessage": "You are a helpful assistant, use the search for information tool to search for users information.\n\nuse Gmail tool to send email"
            },
            "promptType": "define"
          },
          "typeVersion": 1.8
        },
        {
          "id": "52bb3b65-0b7f-4206-87c9-1f91997a44dd",
          "name": "Sticky Note",
          "type": "n8n-nodes-base.stickyNote",
          "position": [
            -1500,
            -560
          ],
          "parameters": {
            "width": 480,
            "height": 240,
            "content": "### ✉️ Sticky Note 2: Website Scraping, Email Generation, and Sending\n\nFor leads with complete data, Dumpling AI scrapes the content of the lead’s company website. This content, combined with scraped details, is structured into a prompt using the Set node. GPT-4o processes the prompt and generates a personalized cold email. The email is then sent to the lead using Gmail. This automates targeted cold outreach using scraped insights and AI-generated messaging.\n"
          },
          "typeVersion": 1
        },
        {
          "id": "3a6df2e9-1d1a-4cab-889c-c323f876b98f",
          "name": "Sticky Note1",
          "type": "n8n-nodes-base.stickyNote",
          "position": [
            -2320,
            -540
          ],
          "parameters": {
            "width": 540,
            "height": 220,
            "content": "### Sticky Note 1: Apollo Link Sourcing & Contact Scraping\n\nThis section begins the workflow manually. The Apollo lead URLs are pulled from a Google Sheet. Each link is passed to Apify which scrapes key lead details such as name, email, company website, and other contact data. After scraping, a filter checks that both an email and website were found for the lead before moving forward. This ensures only complete lead data is used for outreach.\n\n"
          },
          "typeVersion": 1
        }
      ],
      "active": false,
      "pinData": {},
      "settings": {
        "executionOrder": "v1"
      },
      "versionId": "0f1d6a0b-eb13-4e1a-be9e-3f22eb17e66e",
      "connections": {
        "GPT-4o Chat Model": {
          "ai_languageModel": [
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              {
                "node": "LangChain Agent Handles Reply Logic",
                "type": "ai_languageModel",
                "index": 0
              }
            ]
          ]
        },
        "Send Email Response via Gmail": {
          "ai_tool": [
            [
              {
                "node": "LangChain Agent Handles Reply Logic",
                "type": "ai_tool",
                "index": 0
              }
            ]
          ]
        },
        "Classify Email Type with GPT-4o": {
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                "node": " Only Proceed if Email is an Enquiry",
                "type": "main",
                "index": 0
              }
            ]
          ]
        },
        "LangChain Agent Handles Reply Logic": {
          "main": [
            []
          ]
        },
        "Watch Gmail for New Incoming Emails": {
          "main": [
            [
              {
                "node": "Classify Email Type with GPT-4o",
                "type": "main",
                "index": 0
              }
            ]
          ]
        },
        " Only Proceed if Email is an Enquiry": {
          "main": [
            [
              {
                "node": "LangChain Agent Handles Reply Logic",
                "type": "main",
                "index": 0
              }
            ]
          ]
        },
        "Memory Buffer (Past 10 Interactions)": {
          "ai_memory": [
            [
              {
                "node": "LangChain Agent Handles Reply Logic",
                "type": "ai_memory",
                "index": 0
              }
            ]
          ]
        },
        "Dumpling AI Agent – Search for Relevant Info": {
          "ai_tool": [
            [
              {
                "node": "LangChain Agent Handles Reply Logic",
                "type": "ai_tool",
                "index": 0
              }
            ]
          ]
        }
      }
    },
    "lastUpdatedBy": 29,
    "workflowInfo": {
      "nodeCount": 10,
      "nodeTypes": {
        "n8n-nodes-base.filter": {
          "count": 1
        },
        "n8n-nodes-base.gmailTool": {
          "count": 1
        },
        "n8n-nodes-base.stickyNote": {
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        },
        "n8n-nodes-base.gmailTrigger": {
          "count": 1
        },
        "@n8n/n8n-nodes-langchain.agent": {
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        },
        "@n8n/n8n-nodes-langchain.openAi": {
          "count": 1
        },
        "@n8n/n8n-nodes-langchain.lmChatOpenAi": {
          "count": 1
        },
        "@n8n/n8n-nodes-langchain.toolHttpRequest": {
          "count": 1
        },
        "@n8n/n8n-nodes-langchain.memoryBufferWindow": {
          "count": 1
        }
      }
    },
    "status": "published",
    "user": {
      "name": "Yang",
      "username": "yang",
      "bio": "",
      "verified": true,
      "links": [
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      ],
      "avatar": "https://gravatar.com/avatar/6c996ff9ed140535b522858466c376f84e755b851b34b0ad900e4e6568568f84?r=pg&d=retro&size=200"
    },
    "nodes": [
      {
        "id": 565,
        "icon": "fa:sticky-note",
        "name": "n8n-nodes-base.stickyNote",
        "codex": {
          "data": {
            "alias": [
              "Comments",
              "Notes",
              "Sticky"
            ],
            "categories": [
              "Core Nodes"
            ],
            "nodeVersion": "1.0",
            "codexVersion": "1.0",
            "subcategories": {
              "Core Nodes": [
                "Helpers"
              ]
            }
          }
        },
        "group": "[\"input\"]",
        "defaults": {
          "name": "Sticky Note",
          "color": "#FFD233"
        },
        "iconData": {
          "icon": "sticky-note",
          "type": "icon"
        },
        "displayName": "Sticky Note",
        "typeVersion": 1,
        "nodeCategories": [
          {
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            "name": "Core Nodes"
          }
        ]
      },
      {
        "id": 824,
        "icon": "file:gmail.svg",
        "name": "n8n-nodes-base.gmailTrigger",
        "codex": {
          "data": {
            "resources": {
              "generic": [
                {
                  "url": "https://n8n.io/blog/why-business-process-automation-with-n8n-can-change-your-daily-life/",
                  "icon": "🧬",
                  "label": "Why business process automation with n8n can change your daily life"
                },
                {
                  "url": "https://n8n.io/blog/supercharging-your-conference-registration-process-with-n8n/",
                  "icon": "🎫",
                  "label": "Supercharging your conference registration process with n8n"
                },
                {
                  "url": "https://n8n.io/blog/no-code-ecommerce-workflow-automations/",
                  "icon": "store",
                  "label": "6 e-commerce workflows to power up your Shopify s"
                },
                {
                  "url": "https://n8n.io/blog/how-to-get-started-with-crm-automation-and-no-code-workflow-ideas/",
                  "icon": "👥",
                  "label": "How to get started with CRM automation (with 3 no-code workflow ideas"
                },
                {
                  "url": "https://n8n.io/blog/automate-google-apps-for-productivity/",
                  "icon": "💡",
                  "label": "15 Google apps you can combine and automate to increase productivity"
                },
                {
                  "url": "https://n8n.io/blog/your-business-doesnt-need-you-to-operate/",
                  "icon": " 🖥️",
                  "label": "Hey founders! Your business doesn't need you to operate"
                },
                {
                  "url": "https://n8n.io/blog/using-automation-to-boost-productivity-in-the-workplace/",
                  "icon": "💪",
                  "label": "Using Automation to Boost Productivity in the Workplace"
                }
              ],
              "primaryDocumentation": [
                {
                  "url": "https://docs.n8n.io/integrations/builtin/trigger-nodes/n8n-nodes-base.gmailtrigger/"
                }
              ],
              "credentialDocumentation": [
                {
                  "url": "https://docs.n8n.io/integrations/builtin/credentials/google/oauth-single-service/"
                }
              ]
            },
            "categories": [
              "Communication"
            ],
            "nodeVersion": "1.0",
            "codexVersion": "1.0"
          }
        },
        "group": "[\"trigger\"]",
        "defaults": {
          "name": "Gmail Trigger"
        },
        "iconData": {
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          "fileBuffer": "data:image/svg+xml;base64,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"
        },
        "displayName": "Gmail Trigger",
        "typeVersion": 1,
        "nodeCategories": [
          {
            "id": 6,
            "name": "Communication"
          }
        ]
      },
      {
        "id": 844,
        "icon": "fa:filter",
        "name": "n8n-nodes-base.filter",
        "codex": {
          "data": {
            "alias": [
              "Router",
              "Filter",
              "Condition",
              "Logic",
              "Boolean",
              "Branch"
            ],
            "details": "The Filter node can be used to filter items based on a condition. If the condition is met, the item will be passed on to the next node. If the condition is not met, the item will be omitted. Conditions can be combined together by AND(meet all conditions), or OR(meet at least one condition).",
            "resources": {
              "generic": [],
              "primaryDocumentation": [
                {
                  "url": "https://docs.n8n.io/integrations/builtin/core-nodes/n8n-nodes-base.filter/"
                }
              ]
            },
            "categories": [
              "Core Nodes"
            ],
            "nodeVersion": "1.0",
            "codexVersion": "1.0",
            "subcategories": {
              "Core Nodes": [
                "Flow",
                "Data Transformation"
              ]
            }
          }
        },
        "group": "[\"transform\"]",
        "defaults": {
          "name": "Filter",
          "color": "#229eff"
        },
        "iconData": {
          "icon": "filter",
          "type": "icon"
        },
        "displayName": "Filter",
        "typeVersion": 2,
        "nodeCategories": [
          {
            "id": 9,
            "name": "Core Nodes"
          }
        ]
      },
      {
        "id": 1119,
        "icon": "fa:robot",
        "name": "@n8n/n8n-nodes-langchain.agent",
        "codex": {
          "data": {
            "alias": [
              "LangChain",
              "Chat",
              "Conversational",
              "Plan and Execute",
              "ReAct",
              "Tools"
            ],
            "resources": {
              "primaryDocumentation": [
                {
                  "url": "https://docs.n8n.io/integrations/builtin/cluster-nodes/root-nodes/n8n-nodes-langchain.agent/"
                }
              ]
            },
            "categories": [
              "AI",
              "Langchain"
            ],
            "subcategories": {
              "AI": [
                "Agents",
                "Root Nodes"
              ]
            }
          }
        },
        "group": "[\"transform\"]",
        "defaults": {
          "name": "AI Agent",
          "color": "#404040"
        },
        "iconData": {
          "icon": "robot",
          "type": "icon"
        },
        "displayName": "AI Agent",
        "typeVersion": 3,
        "nodeCategories": [
          {
            "id": 25,
            "name": "AI"
          },
          {
            "id": 26,
            "name": "Langchain"
          }
        ]
      },
      {
        "id": 1153,
        "icon": "file:openAiLight.svg",
        "name": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
        "codex": {
          "data": {
            "resources": {
              "primaryDocumentation": [
                {
                  "url": "https://docs.n8n.io/integrations/builtin/cluster-nodes/sub-nodes/n8n-nodes-langchain.lmchatopenai/"
                }
              ]
            },
            "categories": [
              "AI",
              "Langchain"
            ],
            "subcategories": {
              "AI": [
                "Language Models",
                "Root Nodes"
              ],
              "Language Models": [
                "Chat Models (Recommended)"
              ]
            }
          }
        },
        "group": "[\"transform\"]",
        "defaults": {
          "name": "OpenAI Chat Model"
        },
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