🎬 Generate and publish SEO blog posts from Google Sheets to Webflow with OpenAI
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Description
Who it’s for
This n8n workflow is designed for SEO managers, content creators, and blog administrators who want to automate their blog publishing pipeline. The workflow creates an end-to-end AI-powered system that can fetch content ideas from a Google Sheet, scrape existing competitor URLs, analyze SEO structure, generate high-quality articles, validate SEO scores, create thumbnail images, and automatically publish the final content to Webflow.
Features
- Automated Content Scheduling – Runs every 2 hours (or manually) to process pending blog ideas from Google Sheets.
- HTML Scraping & Cleaning – Fetches competitor URLs and removes headers, scripts, and iframes to get clean content.
- AI SEO Structure Analysis – Uses
gpt-4.1-minito extract key sections and SEO bullet points. - AI Content Writer – Uses
o4-minito rewrite articles with proper SEO, H2/H3 tags, and keyword optimization. - Output Parser Fixing – Ensures the AI always returns clean, structured JSON (article + summary).
- Internal Linking – Pulls existing Webflow posts and adds relevant internal links automatically.
- SEO Validation – Checks SEO scores via sub-workflow before publishing.
- AI Thumbnail Generation – Creates a 16:9 cover image based on the article topic using DALL·E.
- Auto-Publishing – Publishes content to Webflow CMS with title, image, article, summary, and read time.
- Sheet Update – Marks the processed row as “Completed” in Google Sheets.
- Error Notifications – Sends alerts via Slack, Discord, Teams, Telegram, and WhatsApp if something fails.
Requirements
- OpenAI API Credentials: For powering the content writer (o4-mini), structure analyzer (gpt-4.1-mini), prompt generator (o4-mini), and image generation (DALL-E 3).
- Google Sheets API: For reading pending blog ideas and updating their completion status.
- Webflow OAuth2 API: For fetching existing posts (for internal linking) and publishing new CMS items.
- n8n Sub-Workflow: A secondary workflow ID (
7FHTcSuCIjHvvBfe) is called to evaluate the SEO score percentages of the generated content. - Communication Platform Credentials (Optional but recommended): API tokens for Slack, Discord, Microsoft Teams, Telegram, and Rapiwa for error notifications.
Configure Credentials
- OpenAI API: Ensure your account has access to
o4-mini,gpt-4.1-mini, and DALL-E 3 models. - Google Sheets: Configure with read/write permissions for the specific spreadsheet and tab (
Blogs (ideas)). - Webflow API: Set up OAuth2 with access to the specific Site ID and Collection ID where your blog is hosted.
- Error Channels: Add your specific Channel IDs, Chat IDs, and phone numbers to the respective notification nodes.
Important Notes
- Content Looping & Error Handling: If the SEO score doesn’t pass the validation check (e.g., required percentages aren’t met), the workflow loops the content back to the AI writer for regeneration.
- Competitor Name Replacement: The AI prompt is strictly instructed to replace competitor names (like PixelCut, CreatorKit) with “ProductAI” to maintain brand consistency.
- CTA Linking: All Call-to-Action links within the generated articles are hard-coded in the prompt to point to
create.productai.photo. - Image Processing Delay: There is a 20-second “Wait” node implemented before publishing to Webflow to ensure the DALL-E generated image URL is active and accessible.
- Dynamic Title Extraction: The workflow uses a Regex code snippet to extract the first
<h2>tag from the generated article to use as the Webflow post title (since H1 is omitted per SEO best practices). - Data Routing: The
Execute Oncefeature is enabled on error notification nodes to ensure you only receive one alert per failure, rather than spamming all connected channels simultaneously.
Support & Help
- WhatsApp: Chat on WhatsApp
- Discord: SpaGreen Community
- Facebook Group: SpaGreen Support
- Website: spagreen.net
- Developer Portfolio: Codecanyon SpaGreen
đź”— Nodes Used
Google Sheets, HTTP Request, Slack, Telegram, Discord, Execute Sub-workflow
đź“Ą Import
Download workflow.json and import into n8n:
Workflow menu → Import from File