n8n LinkedIn Post Automation: OpenAI GPT-5 + Canvra Images

Automatically generate and publish LinkedIn posts every Tue/Thu—using OpenAI GPT-5 and Canvra images

This n8n workflow runs on a fixed Tuesday/Thursday schedule to create a polished LinkedIn post with OpenAI, generate a matching LinkedIn-ready image through the Canvra API, and then publish both to your LinkedIn profile or organization—hands-free.

What this workflow does

• Scheduled posting: Executes every Tuesday and Thursday at 9:00 AM (cron-based; you can change the cadence).
• Create LinkedIn copy with OpenAI: Uses your selected OpenAI model to generate a single 120–180 word LinkedIn post based on a chosen topic.
• Generate a matching visual with Canvra: Sends the post concept to Canvra to create a visual concept type “linkedin_post”. Optionally applies a Canvra brandId for brand kit alignment.
• Wait for image readiness: Polls Canvra every 30 seconds until generation completes or times out.
• Publish to LinkedIn: On success, extracts the hosted image URL, downloads the image, and publishes the post text + image to LinkedIn.
• Fail safely: If generation fails or times out, the workflow stops without posting.

Use cases

• SaaS operators who want consistent LinkedIn thought leadership without manual writing or image creation.
• Automation engineers building content pipelines that combine OpenAI copy generation with Canvra design automation.
• Teams managing personal or organization LinkedIn accounts and needing reliable scheduled posting.

Technical details

• OpenAI integration for LinkedIn post generation (choose your model; workflow writes 120–180 words).
• Canvra API integration using HTTP Header Auth with header name X-API-Key applied to Canvra HTTP Request steps.
• LinkedIn integration to publish the post text and the downloaded image (personal profile or organization).
• n8n nodes used: if, set, code, no op, wait, and linked in.