AI Chatbot: Webhook to Gmail Response

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 →

{
  "name": "Worflow 1",
  "nodes": [
    {
      "parameters": {
        "promptType": "define",
        "text": "={{ $json.message }}",
        "options": {
          "systemMessage": "You are an intelligent email assistant that helps users draft, refine, summarize, and send professional emails.\n\nYour responsibilities:\n\n* Write clear, concise, and effective emails based on the user's intent\n* Adapt tone appropriately (professional, friendly, formal, persuasive, concise, empathetic, etc.)\n* Improve grammar, structure, clarity, and readability\n* Generate subject lines when helpful\n* Ask for missing critical details only when necessary\n* Keep emails actionable and easy to understand\n* Preserve the user\u2019s intended meaning and voice\n* Summarize long email threads when requested\n* Rewrite emails for different tones or audiences\n* Help with follow-ups, replies, introductions, outreach, scheduling, support, and negotiation emails\n\nWhen the user asks to send an email:\n\n* Use the attached Gmail tool\n* Confirm recipients, subject, and final content before sending if any ambiguity exists\n* Never fabricate recipients, facts, attachments, or prior conversations\n* Never expose API keys, credentials, or internal tool details\n\nFormatting rules:\n\n* Use proper email formatting with greeting, body, and sign-off unless the user requests otherwise\n* Keep paragraphs short and readable\n* Avoid unnecessary filler or overly robotic language\n* Prioritize clarity and professionalism\n\nBehavior guidelines:\n\n* Be proactive but concise\n* If the request is vague, ask focused clarifying questions\n* If sufficient information exists, draft the email immediately\n* Suggest improvements when useful\n* Maintain confidentiality and professionalism\n\nOutput style:\n\n* By default, provide polished ready-to-send emails\n* Include a subject line when appropriate\n* Use markdown formatting for readability\n"
        }
      },
      "type": "@n8n/n8n-nodes-langchain.agent",
      "typeVersion": 3.1,
      "position": [
        192,
        0
      ],
      "id": "1c84d068-0eed-41a1-b145-4eea696ef02e",
      "name": "AI Agent"
    },
    {
      "parameters": {
        "options": {}
      },
      "type": "@n8n/n8n-nodes-langchain.lmChatGoogleGemini",
      "typeVersion": 1.1,
      "position": [
        64,
        240
      ],
      "id": "9ea3d44e-7cea-45bb-ac3f-d67b857170bf",
      "name": "Google Gemini Chat Model",
      "credentials": {
        "googlePalmApi": {
          "name": "<your credential>"
        }
      }
    },
    {
      "parameters": {
        "sendTo": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('To', ``, 'string') }}",
        "subject": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('Subject', ``, 'string') }}",
        "message": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('Message', ``, 'string') }}",
        "options": {
          "appendAttribution": false
        }
      },
      "type": "n8n-nodes-base.gmailTool",
      "typeVersion": 2.2,
      "position": [
        368,
        208
      ],
      "id": "f58166b1-0e00-4c5a-af3c-8cf2d87187fb",
      "name": "Send a message in Gmail",
      "credentials": {
        "gmailOAuth2": {
          "name": "<your credential>"
        }
      }
    },
    {
      "parameters": {
        "httpMethod": "POST",
        "path": "ai-mail-agent",
        "options": {}
      },
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 2.1,
      "position": [
        -240,
        0
      ],
      "id": "b9472970-af51-44ad-ab18-172d6f4cdef9",
      "name": "Webhook"
    },
    {
      "parameters": {
        "assignments": {
          "assignments": [
            {
              "id": "c420269f-94fb-4a0e-8e9a-35c9ec2a428f",
              "name": "sessionId",
              "value": "={{ $json.body.sessionId }}",
              "type": "string"
            },
            {
              "id": "fd545fc2-9e75-4450-8674-77f199102c69",
              "name": "message",
              "value": "={{ $json.body.message }}",
              "type": "string"
            }
          ]
        },
        "options": {}
      },
      "type": "n8n-nodes-base.set",
      "typeVersion": 3.4,
      "position": [
        -32,
        0
      ],
      "id": "fa1752e8-0b3c-4e34-8d14-8fee60fbfb31",
      "name": "Edit Fields"
    },
    {
      "parameters": {},
      "type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
      "typeVersion": 1.3,
      "position": [
        208,
        208
      ],
      "id": "eb3cf8dd-9207-4f3c-8c2b-2323f61b823f",
      "name": "Simple Memory"
    }
  ],
  "connections": {
    "Google Gemini Chat Model": {
      "ai_languageModel": [
        [
          {
            "node": "AI Agent",
            "type": "ai_languageModel",
            "index": 0
          }
        ]
      ]
    },
    "Send a message in Gmail": {
      "ai_tool": [
        [
          {
            "node": "AI Agent",
            "type": "ai_tool",
            "index": 0
          }
        ]
      ]
    },
    "Webhook": {
      "main": [
        [
          {
            "node": "Edit Fields",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Simple Memory": {
      "ai_memory": [
        [
          {
            "node": "AI Agent",
            "type": "ai_memory",
            "index": 0
          }
        ]
      ]
    },
    "Edit Fields": {
      "main": [
        [
          {
            "node": "AI Agent",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "active": true,
  "settings": {
    "executionOrder": "v1",
    "binaryMode": "separate"
  },
  "versionId": "e1f0c206-e337-400d-9e95-b52906c3e21d",
  "meta": {
    "templateCredsSetupCompleted": true
  },
  "id": "mkqidVo9c6xrynuX",
  "tags": []
}

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.

• gmailOAuth2
• googlePalmApi

About this workflow

Worflow 1. Uses agent, lmChatGoogleGemini, gmailTool, memoryBufferWindow. Webhook trigger; 6 nodes.

Source: https://github.com/AdityaKarippadathUdai/Gmail-Agent/blob/main/n8n/workflows/ai-mail-agent.json — original creator credit. Request a take-down →

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