LinkedIn Post Automation with n8n: Groq, Gemini & Pinecone

Automate your LinkedIn posting with an n8n workflow that drafts, checks, and publishes—powered by Groq, Google Gemini, and Pinecone

This LinkedIn Post Automation with n8n: Groq, Gemini & Pinecone workflow selects a topic (from Supabase topics or newly uploaded Google Drive files), extracts and cleans source content, generates a strategy and post draft, runs quality/privacy checks, and sends everything to Slack for approval before publishing to LinkedIn.

What this workflow does

• Runs daily on a schedule or triggers when a new file is created in a specific Google Drive folder.
• On scheduled runs, reads eligible topics from a Supabase view, then uses a Groq-powered AI agent to select a topic (or recommend skipping) and fetches the full topic record.
• Routes and extracts source content by type:
  • Downloads and OCR-cleaning images
  • Extracts PDF text
  • Fetches and cleans URL HTML
  • Normalizes provided text into a single field
• Truncates the text, then uses a Groq-powered AI agent to extract structured facts, angles, technical details, and privacy flags.
• Uses a Google Gemini-powered AI agent to query a Pinecone vector index and produce a “strategy contract” (angle, format, hook, structure, CTA, length), which is logged to Supabase.
• Generates the LinkedIn draft with Groq, runs a Groq-based quality checker for factual support, strategy compliance, readability, and privacy, then sends draft + checks to Slack for Approve/Reject/Regenerate.
• If approved, publishes the LinkedIn post and logs it in Supabase.

Use cases

• Regularly publish thought leadership posts from vetted Supabase topics.
• Turn Google Drive uploads (PDFs, images, text, URLs) into ready-to-review LinkedIn drafts.
• Reduce risk with privacy flags and quality checks, enforced through Slack approval.

Technical details

• n8n nodes/utilities: if, set, code, html, no op, wait
• Integrations: Supabase, Google Drive, Groq, Google Gemini, Pinecone, Slack, and LinkedIn