Text-to-image generation with Nano Banana Pro in n8n

Step-by-step

1. Create an account at Key.ai and add billing information to generate an API key
2. In n8n, configure an HTTP Request node to the 'create task' endpoint using the Nano Banana Pro model
3. Input your image prompt, aspect ratio, resolution, and output format into the request body
4. Add a Wait node set to 5 seconds to allow for image generation
5. Configure a second HTTP Request node to the 'query task' endpoint using the Task ID from the first node
6. Add a Switch node to check if the status is 'succeeded', 'generating', or 'failed'
7. Create a loop from the 'generating' path back to the Wait node to poll for results
8. Extract the final image URL from the successful result

Options

• Change aspect ratio to 2:3, 3:2, 16:9, or 9:16
• Set input resolution to 1K, 2K, or 4K
• Use image input for image-to-image generation instead of just text

Watch out for

• You must replace the placeholder string in the workflow with your own Key.ai API key
• Billing information must be configured in Key.ai before you can generate a key

Tips

• Use a polling loop with a Switch node to ensure the workflow only proceeds once the image generation is successful
• Refer to the Nano Banana Pro API documentation to find specific endpoint URLs and required body parameters

Highlights

“when you get this workflow, all you'll have to do is replace this string with your own API key”