n8n Webhook Automation: OpenAI Video Scripts + Creatomate 9:16

Turn one webhook request into approval-ready 9:16 video drafts and Creatomate renders

This n8n Webhook Automation workflow generates short-form video scripts and publishing copy using OpenAI, runs a local copy/duration preflight audit, and then renders approved 9:16 videos through Creatomate—returning either a creative kit, an audit checklist, a render job ID, or the final video URL.

What this workflow does

• Receives webhook actions: Accepts a POST webhook request (header-authenticated) with an action of draft, audit, render, or status.
• Validates and sanitizes inputs: Enforces limits and requires explicit approval and rights confirmation before any rendering is triggered.
• Draft generation (OpenAI): For draft, sends a prompt to the OpenAI Chat Completions API to produce:
  • two hooks
  • a 4-scene storyboard
  • voiceover
  • hashtags
  • SEO metadata and publishing copy for YouTube/TikTok/Instagram
• Deterministic audit: For audit, performs a local preflight to estimate duration and flag copy issues (e.g., length limits and exaggerated claims) and returns a human review checklist.
• 9:16 render (Creatomate): For render, submits the approved Hook, Supporting_Text, and CTA into a Creatomate 1080×1920 template and returns the queued render job ID.
• Render status + results: For status, fetches Creatomate job status and returns the final video URL and snapshot URL once successful.

Use cases

• An SaaS operator triggers script drafts via webhook, then sends the audit checklist to an editor for approval.
• Automation engineers build a “content pipeline” that hands validated copy to Creatomate for consistent 9:16 outputs.
• A media team automates short-form ideation, storyboard/voiceover scripting, and publish-ready metadata—while keeping a review gate before rendering.

Technical details

• n8n nodes: code, switch, webhook, sticky note, http request, respond to webhook
• Integrations: header-authenticated webhook intake, OpenAI Chat Completions API, and Creatomate (render template 1080×1920)
• Security: header-based authentication for incoming requests; rights confirmation required before rendering.

If you’re looking for an n8n webhook automation workflow that pairs OpenAI video scripts with a gated Creatomate 9:16 render flow, this one is built for that.