n8n Webhook Workflow: Generate 2 Images via ImageStyle

Generate images on demand with an n8n Webhook + ImageStyle

This n8n workflow exposes a Webhook that accepts an image prompt (and optional aspect ratio), creates a text-to-image generation task in ImageStyle, polls until completion, and returns the resulting image URL in the webhook response.

What this workflow does

• Receives a POST request to an n8n webhook with JSON containing prompt and optional aspectRatio.
• Normalizes inputs by defaulting aspectRatio to 1:1 when it isn’t provided.
• Creates an ImageStyle generation task by sending the prompt and aspect ratio to ImageStyle /api/v1/generate.
• Waits and polls for completion: it waits 5 seconds, then checks status via ImageStyle /api/v1/generate/{id} until results are available.
• Returns a JSON response including the task ID, status, and output URL/images when ImageStyle reports completed.
• Handles failures and timeouts: returns a 502 JSON error if ImageStyle reports failed or if the task runs longer than 10 minutes.

Use cases

• Build a lightweight API endpoint for your SaaS that turns user prompts into generated images instantly.
• Automate marketing asset previews by triggering ImageStyle from a backend service via webhook.
• Create an internal tool for automation engineers to test prompt-to-image generation with consistent aspect ratios.

Technical details

• n8n nodes: webhook, set, if, wait, http request, and a sticky note.
• ImageStyle integration: uses your ImageStyle API key via an n8n HTTP Header Auth credential sending Authorization: Bearer <YOUR_API_KEY>.
• Activation: start the workflow, then POST to the webhook URL with {"prompt":"...","aspectRatio":"1:1"} (or omit aspectRatio).