Scheduled Postgres Monitoring with Twilio Alerts

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": "34",
  "name": "Monitoring and alerting",
  "nodes": [
    {
      "name": "Cron",
      "type": "n8n-nodes-base.cron",
      "position": [
        250,
        200
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "name": "Postgres",
      "type": "n8n-nodes-base.postgres",
      "position": [
        450,
        200
      ],
      "parameters": {
        "query": "SELECT * FROM n8n WHERE value > 70 AND notification = false;",
        "operation": "executeQuery"
      },
      "credentials": {
        "postgres": "<your credential>"
      },
      "typeVersion": 1
    },
    {
      "name": "Twilio",
      "type": "n8n-nodes-base.twilio",
      "position": [
        650,
        200
      ],
      "parameters": {
        "to": "",
        "from": "",
        "message": "=\ud83d\udea8 The Sensor ({{$node[\"Postgres\"].json[\"sensor_id\"]}}) showed a reading of {{$node[\"Postgres\"].json[\"value\"]}}."
      },
      "credentials": {
        "twilioApi": "<your credential>"
      },
      "typeVersion": 1
    },
    {
      "name": "Set",
      "type": "n8n-nodes-base.set",
      "position": [
        850,
        200
      ],
      "parameters": {
        "values": {
          "number": [
            {
              "name": "id",
              "value": "={{$node[\"Postgres\"].json[\"id\"]}}"
            }
          ],
          "boolean": [
            {
              "name": "notification",
              "value": true
            }
          ]
        },
        "options": {},
        "keepOnlySet": true
      },
      "typeVersion": 1
    },
    {
      "name": "Postgres1",
      "type": "n8n-nodes-base.postgres",
      "position": [
        1050,
        200
      ],
      "parameters": {
        "table": "n8n",
        "columns": "notification",
        "operation": "update"
      },
      "credentials": {
        "postgres": "<your credential>"
      },
      "typeVersion": 1
    }
  ],
  "active": false,
  "settings": {},
  "connections": {
    "Set": {
      "main": [
        [
          {
            "node": "Postgres1",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Cron": {
      "main": [
        [
          {
            "node": "Postgres",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Twilio": {
      "main": [
        [
          {
            "node": "Set",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Postgres": {
      "main": [
        [
          {
            "node": "Twilio",
            "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.

• postgres
• twilioApi

About this workflow

Monitoring and alerting. Uses postgres, twilio. Scheduled trigger; 5 nodes.

Source: https://github.com/Zie619/n8n-workflows — original creator credit. Request a take-down →

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