n8n Gumroad Auto-Posts: OpenAI FB & Instagram Announcements

Auto-post new Gumroad products to Facebook & Instagram—powered by OpenAI

This n8n workflow checks your Gumroad catalog every hour, generates an engaging 2–3 sentence announcement caption with OpenAI (GPT-4o-mini), and publishes fresh product posts to your Facebook Page and Instagram Business account using the Facebook Graph API.

What this workflow does

• Runs hourly using a scheduled trigger.
• Fetches your latest products from the Gumroad API.
• Filters products to include only published, non-deleted items and extracts key fields such as name, price, link, tags, and preview image URL.
• Prevents duplicate posts by comparing product IDs against stored n8n static data, skipping items already announced and avoiding posting on the very first run.
• Generates a social caption with OpenAI (GPT-4o-mini): a 2–3 sentence message including up to three hashtags and the product link.
• Publishes to Facebook via the Facebook Graph API.
• Posts to Instagram by creating and publishing an Instagram media container using the product image (or a provided public fallback image URL) with the same caption via the Facebook Graph API.

Use cases

• SaaS operators and creators who want hands-off promotion when new Gumroad products go live.
• Automation engineers building a repeatable social posting pipeline without manual copywriting or scheduling.
• Teams who want consistent, AI-assisted announcements aligned with product links and metadata.

Technical details

• Schedule Trigger: runs every hour.
• HTTP Request: pulls product data from Gumroad API.
• OpenAI (GPT-4o-mini) for caption generation.
• Facebook Graph API: posts to Facebook Pages and publishes Instagram Business media containers.
• n8n nodes include: set, code, sticky note, http request, schedule trigger, and n8n openai integration.

Setup requires: Gumroad Personal Access Token, Facebook Graph API Page access token (e.g., pages_manage_posts and instagram_content_publish), OpenAI API credential, your Facebook Page ID, Instagram Business account ID, and a publicly reachable fallback image URL.