n8n Seedance Text-to-Video Webhook Workflow

Generate Seedance 2 text-to-video from an n8n webhook—fully automated

This n8n Seedance Text-to-Video Webhook Workflow listens for incoming POST requests, creates a Seedance 2 text-to-video generation job via the Seedance 3 API, polls until it’s done, and then returns the completed task payload to your webhook caller.

What this workflow does

• Receives a webhook request on /seedance-video via an n8n Webhook node.
• Requires a JSON prompt and accepts optional aspect_ratio, duration, and resolution.
• Prepares the Seedance request payload by applying defaults and generating an idempotency key for the execution.
• Creates a Seedance 2 generation task by calling the Seedance 3 API.
• Waits 20 seconds, then checks the task status through the Seedance task endpoint.
• Repeats polling until the status is completed or failed.
• Returns results: if successful, responds with the completed task JSON; if failed, returns the error payload with HTTP 502.

Use cases

• SaaS operators building an API endpoint to generate videos from user prompts without manual intervention.
• Automation engineers integrating Seedance text-to-video generation into existing n8n pipelines (e.g., post-process steps after completion).
• Internal tools where a web client sends prompts and immediately receives the Seedance task output when ready.

Technical details

• Webhook endpoint: /seedance-video (POST)
• Authentication: n8n HTTP Header Auth credential named Seedance 3 API using Authorization: Bearer YOUR_API_KEY
• Nodes used: webhook, http request, wait, if, set, sticky note
• Polling behavior: wait 20 seconds, then repeatedly fetch status until completed or failed

Activate the workflow, copy the production webhook URL, and start sending JSON requests to generate Seedance 2 videos through Seedance 3—end to end.