The problem we solve
Creating high-quality LinkedIn content regularly takes time—especially when aiming for posts that are research-backed, visually aligned with your brand, and consistent in tone. We wanted to eliminate the manual work and make the entire process operate from a simple Slack message.
How it works
This week, we built an AI Agent that automates LinkedIn post creation from a Slack channel using n8n to orchestrate the workflow. The agent combines:
- Research generation via Sonar (Perplexity API) for accurate topic context
- Post copy crafted by GPT-4o in brand voice and LinkedIn tone
- Visual assets created using GPT-Image-1 for on-brand representation
- Slack integration to deliver and iterate via chat
All of this happens from a single prompt inside Slack. The AI agent handles everything—from research to visuals—then sends back a ready-to-publish LinkedIn post, directly in the thread.
Processing and development
- n8n orchestrates API calls between Slack, Sonar, GPT-4o, and GPT-Image-1
- Sonar (Perplexity API) runs deep web research to extract current insights
- GPT-4o agents format the insights into a concise, engaging LinkedIn post and coordinate the Slack chat
- GPT-Image-1 generates visuals tailored to the post topic and tone
- Slack API provides chat interface for initiating and reviewing output
Example walkthrough
Impact
This AI agent turns a multi-hour content creation process into a 60-second Slack interaction:
- Eliminates manual research and design
- Delivers LinkedIn-ready content from Slack
- Maintains consistency in voice and branding
- Frees up creative teams for higher-level strategy
For teams seeking to scale their thought leadership without burning resources, this setup is a game-changer.
Built with
- n8n – AI automation and API workflow builder
- Sonar (Perplexity API) – web research
- GPT-4o – post copy generation
- GPT-Image-1 – image generation
- Slack API – prompt input and result delivery
Complexity
Medium
Looking to leverage modern AI tools within your company? Get in touch and explore next steps.
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