Auto Share New WordPress Posts to Social Media (AI Captions + Slack Alerts)

Save hours of manual work with this ready-to-use n8n automation workflow that automatically shares your new WordPress blog posts across LinkedIn, Twitter (X), and Facebook — complete with AI-generated captions and a Slack notification summary.

When a new post is published on your WordPress site, this workflow kicks in to:

1. Fetch full post data (title, link, excerpt).
2. Use OpenAI (GPT-5-Nano) to craft optimized, platform-specific captions for each social network — professional for LinkedIn, catchy for Twitter, and engaging for Facebook.
3. Automatically shorten URLs with Bitly for a clean and trackable link.
4. Publish to LinkedIn, Twitter (X), and Facebook with smart randomized delays to avoid detection as bot activity.
5. Send a Slack summary showing post title, short URL, and which platforms succeeded or failed.

Whether you’re a solo blogger, marketing agency, or content team, this workflow ensures your content reaches your audience faster — without manual effort. It’s designed with robust error handling, modular nodes, and delay logic so it works smoothly even on busy publishing days.

 ⚙️ Main Features

• 🔗 Trigger: Webhook from WordPress post publish or REST API
• 🧠 AI Caption Generator: Uses OpenAI’s GPT-5-Nano for LinkedIn, Twitter, and Facebook tone variants
• ✂️ Bitly Integration: Automatically shortens your post URL
• 💬 Multi-Platform Posting: Seamlessly shares to LinkedIn, Twitter (X), and Facebook
• ⏳ Smart Delays: Randomized posting intervals mimic natural posting behavior
• 🧾 Slack Notification: Instant summary of all post results and statuses
• 🧰 Error Handling: Each posting node has continueOnFail enabled and status tracking
• 💡 Customizable Prompts: Tailor the AI captions’ tone and creativity for your brand

 🔧 What You’ll Need

• A WordPress site with REST API or webhook trigger enabled
• n8n account (self-hosted or Cloud)
• OpenAI API key
• Bitly API key
• Access tokens for LinkedIn, Twitter (X), and Facebook
• Slack Incoming Webhook URL

 🏷️ Perfect For

• Content creators and bloggers who want to auto-share new posts
• Marketing teams looking to save hours on repetitive publishing tasks
• Agencies managing multiple client WordPress sites
• Social media managers seeking consistent cross-platform sharing

 🔍 SEO Keywords

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📘 Setup Guide 

Setup Instructions

• 1. Import the JSON workflow
  • Download the JSON file and import it into n8n.
  • Review all nodes and connections to ensure proper naming.
• 2. Configure WordPress Node
  • Set up your WordPress credentials using the REST API (Application Passwords plugin recommended).
  • Select the “On New Post” trigger.
• 3. Configure the AI Caption Node
  • Add your OpenAI API key under Credentials → OpenAI.
  • Adjust the prompt to match your tone (e.g., witty, professional, or informative).
• 4. Configure Social Media Nodes
  • Choose your target platforms and authenticate accounts (X, LinkedIn, or Facebook).
  • Insert dynamic fields from the WordPress node for post title, link, and AI caption.
• 5. Set up Slack Notifications
  • Connect your Slack account via OAuth or Bot Token.
  • Define the channel (e.g., #marketing or #content-updates).
• 6. Test & Deploy
  • Publish a test post on WordPress to confirm automation runs correctly.
  • Check social media posts and Slack messages for confirmation.

Troubleshooting & Tips

• Post not triggering? Ensure your WordPress REST API and webhook URL are reachable.
• AI captions not generating? Verify your OpenAI credentials and model name.
• Social post failed? Check API permissions or token expiry.
• Add a delay node between actions if you post to multiple platforms simultaneously.
• Include an Error Workflow to handle failures automatically.

Expand the Automation

Enhance your system by:

• Adding a Notion or Airtable log for published posts.
• Sending weekly performance summaries via Gmail or Slack.
• Translating captions automatically for multilingual audiences.