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Auto-Generate & Publish SEO Blog Posts to WordPress with OpenRouter & Runware

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Created by: Khairul Muhtadin || khmuhtadin
Khairul Muhtadin

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Last update 5 days ago

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Blog posts at near-zero cost. This n8n workflow, BlogBlitz: Runware Edition, automates SEO-optimized WordPress publishing with entirely free OpenRouter AI models for text and metadata, plus ultra-low-cost Runware AI for realistic featured images (as low as $0.0016 per image).

It runs every 3 hours or on demand via Telegram. Each run generates 1,500–3,500-word articles on trending topics in Technology, AI, Tech Facts, History, or Tips, all with catchy titles, slugs, meta descriptions, and visuals.

Last updated: September 2026.

Why This Is So Cost-Efficient

  • Free metadata + article generation (OpenRouter free-tier models)
  • Only cost is image generation via Runware:
    • Image generation: ~$0.0016/image (the cheapest model could be $0,00065)

This is ideal for scale: dozens of high-quality blog posts with minimal expense.

Who Is This For?

  • Bloggers who want high-quality content without writing
  • SEO marketers seeking fresh, long-form articles
  • WordPress site owners automating publishing workflows
  • Growth hackers targeting high-volume content generation

What Problem Does It Solve?

Creating SEO-rich blog content is time-consuming, expensive, and requires expertise. BlogBlitz removes that friction with free models (OpenRouter) for text and metadata, so the workflow is nearly free to operate. The only cost is the featured image (~$0.0016/image).

What This Workflow Does

  • Triggers: Every 3 hours (or via Telegram command: generate)
  • Generates Metadata: Title, slug, category, focus keyphrase, and meta description using OpenRouter
  • Writes SEO Article: 1,500–3,500 words with headings, H2/H3s, CTA, and outbound links
  • Creates Image: Generates realistic 1024×1024 blog image with Runware AI
  • Publishes to WordPress: Auto-publishes with category ID, featured image, and Yoast SEO fields
  • Notifies: Sends publish link to Discord and Telegram (optional)

Setup Instructions

  • Import .json into n8n
  • Add credentials:
    • OpenRouter API (free LLMs like LLaMA-3, Nemotron, docs)
    • Runware API key (get it here)
    • (Optional) Telegram Bot + Discord Webhook
  • Test by sending the word generate via Telegram

Pre-Requirements

  • Self-hosted or cloud-based n8n instance
  • WordPress with category IDs configured:
    • Technology → 3
    • AI → 4
    • Tech Fact → 7
    • Tech History → 8
    • Tech Tips → 9
  • OpenRouter API Key (free)
  • Runware API Key (for images)
  • WordPress user ID (admin, default is 1)
  • Telegram bot (optional)
  • Discord webhook (optional)

Customize It Further

  • Change writing tone or prompt in Compose SEO Article Content node
  • Configure the category
  • Swap free LLMs (Claude, Gemini, GPT, etc.) in OpenRouter settings
  • Adjust schedule (every 6h, daily, etc.)
  • Extend alerts (email, Slack, Notion)

Nodes Used

  • Schedule Trigger
  • Telegram Trigger
  • @n8n/n8n-nodes-langchain (OpenRouter)
  • WordPress Node
  • HTTP Request (Runware API)
  • Discord Webhook
  • Sticky Notes (Documentation inside canvas)

Quick Answers

What does it actually cost to run?
Text and metadata are free via OpenRouter free-tier models. You only pay ~$0.0016 per featured image.
How often does it publish?
Every 3 hours by default, or manually with generate on Telegram.
How long are the articles?
1,500–3,500 words with headings, CTA, and outbound links.

Support

Created by: khmuhtadin
Tag: wordpress, blog, seo, openai, telegram
Category: AI Automation, Blogging
Need a custom? contact me on LinkedIn or Web

Additional info

Built with n8n. Need an assessment on your business? Feel free to reach out at https://khmuhtadin.com/consultation/