Validate & Submit Text-to-Video Batches via HTTP API in n8n

Validate and (optionally) submit text-to-video batches via HTTP API—ready for review in n8n

This n8n workflow validates 1–5 text-to-video briefs, then (when enabled) sends each one to your video-generation provider through an HTTP API call with deterministic idempotency—producing a review-ready manifest with job status and result URLs.

What this workflow does

• Manual batch run: Start the workflow manually to process a configured batch of video briefs.
• Brief validation: For each brief, it checks job ID format/uniqueness, prompt length, allowed duration, aspect ratio, and seed. If any input is invalid, the workflow stops.
• Batch expansion: It expands your batch into per-brief requests, adding a deterministic Idempotency-Key and the configured providerBaseUrl.
• Demo mode vs live mode:
  • Demo mode: Generates offline fixture results (example video URLs) and marks each job as completed—no credentials or network calls.
  • Live mode: Sends one POST request per brief to the provider API using HTTP Header Auth, capturing the full HTTP response.
• Response classification & manifest: It classifies each response (accepted, rejected, provider error, or ambiguous) and compiles a review-ready manifest containing job metadata, provider job IDs, and any result URLs.

Use cases

• Before launching text-to-video generation, verify prompts, duration, aspect ratio, and seed constraints for a small batch (1–5).
• Run a safe demo workflow that outputs example result URLs for stakeholders without calling the provider API.
• Submit real jobs with idempotency to prevent duplicate video generation when requests are retried.

Technical details

• Trigger: Manual Trigger
• Nodes used: if, set, code, sticky note, http request, manual trigger
• Authentication: HTTP Header Auth credential for the provider API key/token
• Key settings: providerBaseUrl, allowPaidProcessing=true (after reviewing provider pricing), and optional demo mode behavior

Perfect for n8n users, automation engineers, and SaaS operators building a controlled “validate → submit → review” text-to-video pipeline.