n8n: Advanced image generation via HTTP Request

Step-by-step

1. Add an HTTP Request node and change the method to POST.
2. Enter the Google API URL into the URL field.
3. Set Authentication to Generic Credential Type and select Header Auth.
4. Create a new credential with the name 'x-goog-api-key' and paste your API key into the value field.
5. Enable Send Body, set Content Type to JSON, and select Using JSON for the body specification.
6. Paste the JSON payload into the body field, ensuring the prompt is mapped from the previous form node.
7. Add a 'Convert to File' node and select 'Base64 to File'.
8. Map the data property from the HTTP Request output into the Base64 string field and execute.

Options

• Set image size to 1k, 2k, or 4k
• Adjust the aspect ratio within the generation config object

Watch out for

• You must enable specific modalities within the generation config object for the request to work.
• The HTTP Request node initially returns a raw base64 string rather than a viewable image file.

Tips

• Rename the HTTP Request node to 'Generate Image' to keep the workflow organized.
• If you don't want to type the JSON payload manually, copy it from the provided workflow description.

Highlights

“Now there's really not much to this.”