n8n Workflow: Generate AI Images via Kavel Form Trigger

Generate AI images from an n8n form using Kavel—no API key required

This n8n workflow turns an image prompt and aspect ratio submitted via an n8n Form Trigger into a finished AI-generated image using Kavel. It automatically starts generation, handles free-tier quota limits, polls for completion, and downloads the resulting file when ready.

What this workflow does

• Receives user input from an n8n form submission containing a prompt and aspect ratio.
• Creates a unique anonymous client ID and formats the request payload for Kavel’s anonymous text-to-image API.
• Starts image generation by sending a POST request to Kavel.
• Stops early on quota exhaustion with an “out of free quota” message if Kavel reports the anonymous daily quota is exhausted.
• Waits and polls (waits 20 seconds, then checks task status) until the generation succeeds or fails.
• Downloads the generated image from the returned URL on success, or returns a failure message with the provided reason.

Use cases

• Give customers or internal teams a simple form to request AI images with specific aspect ratios.
• Create a lightweight image generation request workflow for marketing mockups, blog headers, or social assets.
• Prototype an AI image pipeline that saves outputs to a destination node (e.g., Google Drive, Slack, S3, or WordPress) after download.

Technical details

• Integration: Kavel (anonymous tier; no API key/credentials required for the anonymous setup).
• Workflow nodes/stacks: if, set, code, wait, sticky note, form trigger.
• Setup: Run once to obtain the form URL, then share it with users who submit prompts.
• Customization: Swap the model field in the “Start generation” node (see Kavel’s models page) to use a different engine.