Generate AI Newsletter Drafts from Google Sheets to Notion with GPT-5-mini

How it works:

This template turns rows in a Google Sheet into polished newsletter drafts in Notion using an AI writing agent. You click Execute workflow in n8n. It fetches all rows marked N8n Status = Pending, generates a draft from Newsletter Title and About the Newsletter, creates a Notion page, writes the full draft, then flips the sheet row to Done before moving to the next one.

Before you start (use your own credentials):

Create and select your credentials in n8n:

Google Sheets (OAuth2 or Service Account) with access to the target spreadsheet. Notion (Internal Integration) with access to the target database. OpenAI (API Key) for the Chat Model. Replace any placeholders in nodes:

Spreadsheet ID/URL and sheet/tab name (e.g., newsletter). Notion Database ID / Parent and any page or block IDs used by HTTP Request nodes. OpenAI model name if you prefer a different model. Give the Notion integration access to the database (Share → Invite the integration). Do not hard-code secrets in nodes. Store them in n8n Credentials.

Step-by-step:

Manual Trigger Start the run with When clicking ‘Execute workflow’.

Fetch pending input (Google Sheets → Get row(s) in sheet) Read the newsletter tab and pull only rows where N8n Status = Pending.

Iterate (Split In Batches → Loop Over Items) Process one sheet row at a time for stable memory use and pacing.

Generate the newsletter (AI Agent + OpenAI Chat Model)

AI Agent loads the “System Role Instructions” that define style, sections, and format. Pass Newsletter Title and About the Newsletter to the OpenAI Chat Model to produce the draft.

Create a Notion page (Notion → Create Page) Create a page in your Newsletter Automation database with the page title set from Newsletter Title.

Prepare long content for Notion (Code) Split the AI output into ~1,800-character chunks and wrap as Notion paragraph blocks to avoid payload limits.

Write content blocks to Notion (HTTP Request → UpdateNotionBlock) Send a PATCH request to append all generated blocks so the full draft appears on the page.

Mark the sheet row as done (Google Sheets → Update row in sheet) Update N8n Status = Done for the processed Newsletter Title.

Continue the loop Return to Split In Batches for the next pending row until none remain.

Tools integration:

Google Sheets** — input queue and status tracking (Pending → Done) OpenAI** — LLM that writes the draft from provided fields Notion** — destination database for each draft page n8n Code + HTTP Request** — chunking and Notion API block updates

Want auto-runs? Add a Cron trigger before step 2 and keep the flow unchanged.