{
  "name": "Monitor Sheet URLs to Telegram",
  "tags": [],
  "nodes": [
    {
      "id": "monitor-sheet-urls-to-telegram-0",
      "name": "Telegram",
      "type": "n8n-nodes-base.telegram",
      "position": [
        860,
        160
      ],
      "parameters": {
        "text": "={{ 'Health Check :  ' + $('Fetch Urls').item.json.URLS + '\\n\\nHTTP request failed' }}",
        "chatId": "YOUR_TELEGRAM_CHAT_ID",
        "additionalFields": {
          "appendAttribution": false
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "monitor-sheet-urls-to-telegram-1",
      "name": "Schedule Trigger",
      "type": "n8n-nodes-base.scheduleTrigger",
      "position": [
        0,
        0
      ],
      "parameters": {
        "rule": {
          "interval": [
            {
              "field": "minutes"
            }
          ]
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "monitor-sheet-urls-to-telegram-2",
      "name": "Fetch Urls",
      "type": "n8n-nodes-base.googleSheets",
      "position": [
        220,
        0
      ],
      "parameters": {
        "options": {},
        "sheetName": {
          "__rl": true,
          "mode": "name",
          "value": "Sheet1"
        },
        "documentId": {
          "__rl": true,
          "mode": "id",
          "value": "YOUR_SPREADSHEET_ID"
        }
      },
      "typeVersion": 4.5
    },
    {
      "id": "monitor-sheet-urls-to-telegram-3",
      "name": "Check URL",
      "type": "n8n-nodes-base.httpRequest",
      "onError": "continueErrorOutput",
      "position": [
        520,
        0
      ],
      "parameters": {
        "url": "={{ $json.URLS }}",
        "options": {
          "timeout": 30000
        }
      },
      "typeVersion": 4.2,
      "alwaysOutputData": false
    },
    {
      "id": "monitor-sheet-urls-to-telegram-validate",
      "name": "Validate the URL",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        350,
        0
      ],
      "parameters": {
        "mode": "runOnceForEachItem",
        "jsCode": "const url = $json.URLS;\nif (typeof url !== 'string' || !url.trim() || /[\\r\\n]/.test(url)) throw new Error('Every row needs a URL');\nif (!/^https?:\\/\\/[^\\/?#@\\s]+(?:[\\/?#][^\\s]*)?$/i.test(url)) throw new Error('Every URL must be HTTP or HTTPS without credentials');\nreturn {json: $json};"
      }
    }
  ],
  "active": false,
  "pinData": {},
  "settings": {
    "executionOrder": "v1",
    "timezone": "UTC"
  },
  "connections": {
    "Check URL": {
      "main": [
        [],
        [
          {
            "node": "Telegram",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Fetch Urls": {
      "main": [
        [
          {
            "node": "Validate the URL",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Schedule Trigger": {
      "main": [
        [
          {
            "node": "Fetch Urls",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Validate the URL": {
      "main": [
        [
          {
            "node": "Check URL",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}