n8n Automate Trend Research to Blog Content: GPT-4o Multi-Angle Outlines and DALL-E Cover Images

Input a search keyword → Apify scrapes Google results → GPT-4o plans 3 article angles and writes full drafts → DALL-E 3 generates cover images → Save to Notion and notify via Slack

Who

Content operators, SEO specialists, or small editorial teams who need trend-based blog drafts generated automatically

You get

Automatically fetch Google search results on a schedule, generate 3 blog drafts in Markdown from different angles with matching cover images, save them to a Notion database, and report links via Slack

You need

n8n · slack

Steps

1. Import workflow and configure credentials

   Import the workflow JSON into your n8n editor. Then configure credentials for: Apify (for the Google Search Scraper actor), OpenAI (for GPT-4o and DALL-E 3), Notion (to access your database), and Slack (OAuth2 for notifications). n8n will automatically associate credentials with the corresponding nodes.

2. Set the search keyword

   Open the Workflow Configuration node and change searchKeyword from the default "2025年 AIツール" to your target topic, such as "Keto Diet" or "Investment Trends". This keyword is passed to the Apify Google Search Scraper.

3. Prepare Notion database and authorize integration

   Create a Notion database (suggested properties: Title, Content). Open the database page menu → Connect to → select your n8n integration to grant access. Then select this database in the Save Article to Notion node. Note: the notionDatabaseId in workflow.json is a placeholder and must be replaced with the actual database ID or reselected via the node UI.

4. Specify Slack notification channel

   In the Send Completion Notification to Slack node, replace the channelId placeholder with your target channel name (e.g., general) or channel ID. Ensure the Slack OAuth2 credential is authorized to post to that channel.

5. Run workflow: from trend research to content publishing

   The workflow executes automatically in this order: 1) Schedule Trigger (default: Monday 9:00 AM) fires; 2) Workflow Configuration outputs the keyword and settings; 3) Apify node runs Google Search Scraper and fetches top 5 results; 4) GPT-4o (AI Editorial Meeting) analyzes search results and outputs a JSON array of 3 article ideas (Beginner / Critical Review / Business Use Case), each with title, outline, and image_prompt; 5) Code node Parse Article Ideas JSON extracts the JSON array from the GPT-4o response; 6) GPT-4o (AI Writer) writes the full article body in Markdown based on title and outline; 7) DALL-E 3 generates a 1024x1024 cover image from image_prompt; 8) Save Article to Notion saves the title, cover image URL, and research text as a database page; 9) Aggregate All Articles collects all generated Notion page URLs; 10) Slack sends a completion report listing the 3 article links.

   Execution prompt · Source text。AI Editorial Meeting - Generate 3 Article Ideas node, responses.values[0].content field

   Copy prompt

   あなたはWebメディアの編集長です。
   以下のGoogle検索結果の情報を元に、3つの異なる切り口でブログ記事の企画を立ててください。
   
   【検索結果データ】
   {{ JSON.stringify($input.all()) }}
   
   【条件】
   必ず以下のJSON形式の配列のみを出力してください。余計な会話や挨拶は一切不要です。
   
   [
     {
       "angle": "初心者向け",
       "title": "記事タイトル",
       "outline": "記事の構成案",
       "image_prompt": "Image generation prompt in English"
     },
     {
       "angle": "辛口レビュー",
       "title": "記事タイトル",
       "outline": "記事の構成案",
       "image_prompt": "Image generation prompt in English"
     },
     {
       "angle": "ビジネス活用",
       "title": "記事タイトル",
       "outline": "記事の構成案",
       "image_prompt": "Image generation prompt in English"
     }
   ]

   Execution prompt · Source text。AI Writer - Generate Article Content node, messages.values[0].content field

   Copy prompt

   あなたはプロのライターです。以下のタイトルと構成案に基づき、ブログ記事の本文を執筆してください。
   HTMLタグは使わず、Markdown形式（見出しは ## など）で書いてください。
   
   【タイトル】
   {{ $('Parse Article Ideas JSON').item.json.title }}
   
   【構成案】
   {{ $('Parse Article Ideas JSON').item.json.outline }}

   Execution prompt · Source text。DALL-E Generate Cover Image node, prompt field

   Copy prompt

   ={{ $('Parse Article Ideas JSON').item.json.image_prompt }}

   Execution prompt · Source text。Send Completion Notification to Slack node, text field

   Copy prompt

   =✅ *AI編集部レポート*
   
   3本の記事案をNotionに格納しました！
   
   {{ $json.url.map((url, i) => `${i+1}. ${url}`).join('\n') }}
   
   確認してください 📝

You are an n8n workflow setup assistant. The user wants to replicate the "AI Editor-in-Chief" template: automatically generate 3 Notion blog drafts from Google search trends. Assist in this order: 1) Confirm the user has n8n v1.0+, an Apify account, an OpenAI API key, a Notion database, and Slack OAuth2; 2) Guide them to import workflow.json; 3) Remind them to replace searchKeyword, Notion database ID, and Slack channel in Workflow Configuration; 4) Explain the Notion authorization step (Connect to → select n8n integration); 5) Suggest a manual test run before scheduling to verify the Apify actor returns results and GPT-4o JSON output is parsed correctly by the Code node. Do not perform API calls or fill in real credentials on behalf of the user.