Create AI-Generated Social Media Posts from RSS Feeds with GPT-5 and JsonCut

Automatically create and publish ready-to-post social media news updates — all powered by AI.
This workflow turns any RSS feed into professional, branded posts, complete with visuals and captions.

Use cases include automating news updates, sharing industry insights, or maintaining an active social presence without manual work.

Good to know

Fully automated end-to-end publishing — from RSS feed to social post
Uses JsonCut for dynamic image composition (backgrounds, text overlays, logos)
Publishes directly to Instagram (or other channels) via Blotato
Utilizes OpenAI GPT-5 for post text and image prompt generation
Polling mechanism checks job status every 3 seconds
Setup time: under 10 minutes once credentials are in place

How it works

The RSS Trigger monitors any RSS feed for new content.
OpenAI GPT-5 rewrites the headline and creates a short, social-friendly post caption.
An AI image prompt is generated to match the article’s topic and mood.
JsonCut combines the background, logo, and headline text into a branded image.
Once the image is ready, Blotato uploads and publishes the post directly to Instagram (or other connected platforms).

The process runs completely automatically — no human input required after setup.

How to use

Import the workflow into your n8n instance.
Configure your RSS feed URL(s).
Add your JsonCut, Blotato, and OpenAI credentials.
Activate the workflow — it will automatically generate and post new content whenever your RSS source updates.

Requirements

Free account at jsoncut.com
Account at blotato.com (paid service — can be replaced with any social media API or publishing platform)
API keys for both services:
JsonCut API Key via app.jsoncut.com
Blotato API Key via www.blotato.com
OpenAI credential** (GPT-5 or compatible model)
RSS Feed URL** (e.g. from a news site, blog, or press page)

Setup steps

Sign up for a free account at app.jsoncut.com.
If you use Blotato, create an account at blotato.com and generate an API key.
In n8n, add:
JsonCut API Key (HTTP Header Auth, header: x-api-key)
Blotato API credential (optional — can be replaced)
OpenAI credential for GPT-5
Replace the example RSS URL in the RSS Feed Trigger node with your own.
Activate the workflow — it will start monitoring, generating, and posting automatically.

Customising this workflow

You can easily adjust:
The image layout and branding (in the “Create JsonCut Job” node)
The tone or length of social captions (in the “Create Instagram Text” node prompt)
The publishing platform — replace Blotato with another integration (e.g. Buffer, Hootsuite, or native social API)
Posting frequency via the RSS trigger interval

For advanced customization, check out:
JsonCut Documentation
JsonCut Image Generation Examples
Blotato Website
n8n Documentation