Google Calendar Reminder with GPT-4o and Telegram

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 →

{
  "id": "SvYHgLmzosuLAe4A",
  "meta": {
    "templateCredsSetupCompleted": true
  },
  "name": "Google Calendar Event Reminder",
  "tags": [],
  "nodes": [
    {
      "id": "dff5d952-23cb-4822-9aec-0dcae3de568a",
      "name": "Schedule Trigger",
      "type": "n8n-nodes-base.scheduleTrigger",
      "disabled": true,
      "position": [
        -40,
        300
      ],
      "parameters": {
        "rule": {
          "interval": [
            {
              "field": "minutes",
              "minutesInterval": 1
            }
          ]
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "a6de9944-1dd7-430e-a1d9-100710ddfa9c",
      "name": "OpenAI Chat Model",
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "position": [
        700,
        500
      ],
      "parameters": {
        "model": {
          "__rl": true,
          "mode": "list",
          "value": "gpt-4o-mini"
        },
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "name": "<your credential>"
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "6d2208a6-6000-4b6b-a82c-e346b7885409",
      "name": "Get upcoming event",
      "type": "n8n-nodes-base.googleCalendar",
      "position": [
        240,
        300
      ],
      "parameters": {
        "limit": 5,
        "options": {},
        "timeMax": "={{ $now.plus({ hour: 1, minute:1 }) }}",
        "timeMin": "={{ $now.plus({ hour: 1 }) }}",
        "calendar": {
          "__rl": true,
          "mode": "list",
          "value": "user@example.com",
          "cachedResultName": "user@example.com"
        },
        "operation": "getAll"
      },
      "credentials": {
        "googleCalendarOAuth2Api": {
          "name": "<your credential>"
        }
      },
      "typeVersion": 1.3
    },
    {
      "id": "e6f6e744-60b0-4b22-93bc-f3ffcfac71f6",
      "name": "Already sent?",
      "type": "n8n-nodes-base.removeDuplicates",
      "position": [
        480,
        300
      ],
      "parameters": {
        "options": {},
        "operation": "removeItemsSeenInPreviousExecutions",
        "dedupeValue": "={{ $json.id }}"
      },
      "typeVersion": 2
    },
    {
      "id": "882d08f5-790a-40bb-bda5-60744d587633",
      "name": "Secretary Agent",
      "type": "@n8n/n8n-nodes-langchain.agent",
      "position": [
        720,
        300
      ],
      "parameters": {
        "text": "=These are the details of the event/appointment:\n\nEvent Name: {{ $('Get upcoming event').item.json.summary }}\nDescription: {{ $('Get upcoming event').item.json.description }}\nLocation: {{ $('Get upcoming event').item.json.location }}\nStart: {{ $('Get upcoming event').item.json.start.dateTime }}\nEnd: {{ $('Get upcoming event').item.json.end.dateTime }}\nCreated by: {{ $('Get upcoming event').item.json.creator.email }}",
        "options": {
          "systemMessage": "=## Core Identity\nYou are a professional and friendly virtual secretary, dedicated to reminder appointments with efficiency and a warm personal touch.\n\n## Communication Style\n- Communicate in a conversational, approachable manner\n- Maintain a balance between professional competence and friendly rapport\n- Use a tone that is informal yet precise\n- Inject occasional light humor and personality into interactions\n\n## Key Responsibilities\n1. Calendar Management\n   - Provide timely reminders and scheduling updates\n\n2. Communication Approach\n   - Respond promptly and clearly\n   - Maintain confidentiality and discretion\n\n## Interaction Guidelines\n- Use a friendly, conversational tone\n- Just describe the details of the event without asking questions\n\n## Tone and Language\n- Warm and approachable\n- Professional but not overly formal\n- Direct and clear in communication\n- Use simple, straightforward language\n- Show genuine care and attentiveness\n\nRemember: Your primary goal is to make the user's life easier, more organized, and less stressful through efficient and friendly administrative support."
        },
        "promptType": "define",
        "hasOutputParser": true
      },
      "typeVersion": 1.8
    },
    {
      "id": "82509a0f-9086-423e-8928-f882e59333b8",
      "name": "Send reminder",
      "type": "n8n-nodes-base.telegram",
      "position": [
        1100,
        300
      ],
      "parameters": {
        "text": "={{ $json.output }}",
        "chatId": "CHAT_ID",
        "additionalFields": {
          "appendAttribution": false
        }
      },
      "credentials": {
        "telegramApi": {
          "name": "<your credential>"
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "d08dd565-4718-4fbc-af7c-7a2e042c96f8",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -40,
        -140
      ],
      "parameters": {
        "color": 3,
        "width": 620,
        "content": "## Google Calendar Event Reminder\nThis smart **Google Calendar** workflow fixes that by sending you a clear, friendly reminder exactly **1 hour before your event starts**\u2014delivered through **Telegram** as if a personal assistant were looking out for you. Powered by **AI**, it transforms cold calendar alerts into warm, conversational nudges you won't ignore."
      },
      "typeVersion": 1
    },
    {
      "id": "7a9379ca-f301-40b9-ae90-742663bbcdf2",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -40,
        40
      ],
      "parameters": {
        "width": 620,
        "height": 140,
        "content": "## STEP 1\n- In the \"Get upcoming event\" node enter how much time before the event starts you want to be notified. It is currently set to 1 hour\n- In the Telegram node replace CHAT_ID with that of your personal Bot"
      },
      "typeVersion": 1
    },
    {
      "id": "d7852912-6501-4a1b-8928-6eb890e4aea8",
      "name": "Sticky Note2",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        420,
        240
      ],
      "parameters": {
        "width": 220,
        "height": 200,
        "content": "Prevent multiple reminders for the same event"
      },
      "typeVersion": 1
    }
  ],
  "active": false,
  "settings": {
    "timezone": "Europe/Rome",
    "callerPolicy": "workflowsFromSameOwner",
    "executionOrder": "v1"
  },
  "versionId": "d0dd74db-e96c-4a09-a8d1-6fb193b6e015",
  "connections": {
    "Already sent?": {
      "main": [
        [
          {
            "node": "Secretary Agent",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Secretary Agent": {
      "main": [
        [
          {
            "node": "Send reminder",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Schedule Trigger": {
      "main": [
        [
          {
            "node": "Get upcoming event",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "OpenAI Chat Model": {
      "ai_languageModel": [
        [
          {
            "node": "Secretary Agent",
            "type": "ai_languageModel",
            "index": 0
          }
        ]
      ]
    },
    "Get upcoming event": {
      "main": [
        [
          {
            "node": "Already sent?",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}

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.

• googleCalendarOAuth2Api
• openAiApi
• telegramApi

About this workflow

How many times have you missed a meeting or forgotten an appointment because a calendar reminder got lost in the noise? Traditional notifications are often dry, easy to ignore, or scattered across different apps—leaving you scrambling at the last minute.

Source: https://n8n.io/workflows/3393/ — original creator credit. Request a take-down →

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