Generate and schedule LinkedIn, X, and Instagram posts with OpenAI agents

This workflow orchestrates three specialized AI agents in sequence to research trends, generate platform-specific content (captions + images), and schedule posts across LinkedIn, X (Twitter), and Instagram.

Who's it for • Social media managers handling multiple brands • Marketing teams needing consistent content pipelines • Creators automating their content calendar • Agencies managing high-volume posting schedules

How it works A topic/industry keyword is submitted via webhook or schedule Agent 1 (Research): Searches current trends, extracts insights & hashtags Agent 2 (Content Gen): Produces platform-specific captions + image prompts Agent 3 (Scheduling): Posts to LinkedIn, X, and Instagram via their APIs All activity is logged to a Google Sheet tracker

How to set up Import this workflow into n8n Set credentials: OpenAI, LinkedIn OAuth2, Twitter OAuth2, Instagram Graph API, Google Sheets OAuth2, SendGrid (optional alerts) Replace YOUR_SHEET_ID placeholder in the Google Sheet node Replace YOUR_INSTAGRAM_ACCOUNT_ID, YOUR_LINKEDIN_PERSON_URN placeholders Activate the workflow

Requirements • OpenAI API key (GPT-4.1 mini or better) • LinkedIn OAuth2 credentials • Twitter/X OAuth2 credentials • Instagram Graph API credentials (Business account) • Google Sheets OAuth2 • Optional: Stable Diffusion / DALL-E for image generation

How to customize • Swap OpenAI model in all AI nodes • Adjust character limits per platform in Agent 2 prompt • Modify posting schedule in the Schedule Trigger node • Add Slack/email notifications on post confirmation • Extend the Google Sheet columns for additional metadata