Stop checking competitor prices manually — automate it with n8n (free workflow JSON)

{
  "name": "Price Monitor",
  "nodes": [
    {
      "parameters": { "rule": { "interval": [{ "field": "cronExpression", "expression": "0 9,15,21 * * *" }] } },
      "id": "pm1", "name": "Check 3x Daily", "type": "n8n-nodes-base.scheduleTrigger", "typeVersion": 1.2, "position": [240, 300]
    },
    {
      "parameters": {
        "operation": "read",
        "documentId": { "__rl": true, "value": "YOUR_SHEET_ID", "mode": "id" },
        "sheetName": { "__rl": true, "value": "Products", "mode": "name" }
      },
      "id": "pm2", "name": "Get Product URLs", "type": "n8n-nodes-base.googleSheets", "typeVersion": 4.5, "position": [460, 300]
    },
    {
      "parameters": { "url": "={{ $json.url }}", "options": { "redirect": { "redirect": { "followRedirects": true } } } },
      "id": "pm3", "name": "Fetch Product Page", "type": "n8n-nodes-base.httpRequest", "typeVersion": 4.2, "position": [680, 300]
    },
    {
      "parameters": {
        "jsCode": "const html = $input.first().json.data || '';\nconst prev = $('Get Product URLs').first().json;\nconst priceMatch = html.match(/\\$([\\d,]+\\.?\\d{0,2})/) || html.match(/price['\"]?\\s*[:>]\\s*\\$?([\\d,]+\\.?\\d{0,2})/i);\nconst currentPrice = priceMatch ? parseFloat(priceMatch[1].replace(',', '')) : null;\nconst previousPrice = prev.lastPrice ? parseFloat(prev.lastPrice) : null;\nconst changed = currentPrice !== null && previousPrice !== null && currentPrice !== previousPrice;\nconst direction = changed ? (currentPrice > previousPrice ? 'increased' : 'decreased') : 'unchanged';\nreturn [{ json: { productName: prev.name, url: prev.url, currentPrice, previousPrice, changed, direction, checkedAt: new Date().toISOString() } }];"
      },
      "id": "pm4", "name": "Extract & Compare Price", "type": "n8n-nodes-base.code", "typeVersion": 2, "position": [900, 300]
    },
    {
      "parameters": {
        "conditions": { "conditions": [
          { "leftValue": "={{ $json.changed }}", "rightValue": true, "operator": { "type": "boolean", "operation": "true" } }
        ]}
      },
      "id": "pm5", "name": "Price Changed?", "type": "n8n-nodes-base.if", "typeVersion": 2.2, "position": [1120, 300]
    },
    {
      "parameters": {
        "sendTo": "your-email@example.com",
        "subject": "=Price Alert: {{ $json.productName }} {{ $json.direction }}!",
        "message": "=Price change detected!\n\nProduct: {{ $json.productName }}\nPrevious: ${{ $json.previousPrice }}\nCurrent: ${{ $json.currentPrice }}\nDirection: {{ $json.direction }}\nURL: {{ $json.url }}\n\nChecked at: {{ $json.checkedAt }}"
      },
      "id": "pm6", "name": "Send Alert", "type": "n8n-nodes-base.gmail", "typeVersion": 2.1, "position": [1340, 200]
    },
    {
      "parameters": {
        "operation": "append",
        "documentId": { "__rl": true, "value": "YOUR_SHEET_ID", "mode": "id" },
        "sheetName": { "__rl": true, "value": "PriceHistory", "mode": "name" },
        "columns": { "mappingMode": "autoMapInputData" }
      },
      "id": "pm7", "name": "Log Price History", "type": "n8n-nodes-base.googleSheets", "typeVersion": 4.5, "position": [1340, 420]
    }
  ],
  "connections": {
    "Check 3x Daily": { "main": [[{ "node": "Get Product URLs", "type": "main", "index": 0 }]] },
    "Get Product URLs": { "main": [[{ "node": "Fetch Product Page", "type": "main", "index": 0 }]] },
    "Fetch Product Page": { "main": [[{ "node": "Extract & Compare Price", "type": "main", "index": 0 }]] },
    "Extract & Compare Price": { "main": [[{ "node": "Price Changed?", "type": "main", "index": 0 }]] },
    "Price Changed?": { "main": [[{ "node": "Send Alert", "type": "main", "index": 0 }], [{ "node": "Log Price History", "type": "main", "index": 0 }]] }
  },
  "settings": { "executionOrder": "v1" },
  "tags": [{ "name": "monitoring" }, { "name": "ecommerce" }]
}