Webhookを使ってScreenshotMachine APIを使用してウェブサイトのスクリーンショットをリアルタイムで生成する

• •HTTP Webhookエンドポイント（n8nが自動生成）
• •ターゲットAPIの認証情報が必要な場合あり

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  "name": "Generate Website Screenshots On-Demand with ScreenshotMachine API via Webhooks",
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      "parameters": {
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        "content": "This node listens for incoming POST requests. It expects a JSON body with a 'url' property (the website URL you want to screenshot)."
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      "typeVersion": 1
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        "content": "This node makes an HTTP GET request to the ScreenshotMachine API using the validated URL. Remember to replace 'YOUR_API_KEY' in the URL parameter with your actual API key.\n\nThis method is critical: ScreenshotMachine typically uses GET for this type of request."
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        "content": "1. If the URL is invalid or blocked by security checks, it sends a clear error message.\n2. If the screenshot is successful, it sends the data received from ScreenshotMachine API back to the original webhook caller."
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        "content": "This node performs a HEAD request to the incoming URL.\n\nIt checks if the URL is reachable and resolves any redirects. This acts as an initial connectivity and basic validity check before more granular SSRF validation."
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        "url": "=https://api.screenshotmachine.com?key=YOUR_API_KEY&url={{$json.validatedUrl}}",
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