Generate or edit images via BlockRun's image API. Trigger when the user asks to generate, create, draw, make an image — or to edit, modify, change, or retouch an existing image.
Generate or edit images through ClawRouter. Payment is automatic via x402.
POST to http://localhost:8402/v1/images/generations:
{
"model": "google/nano-banana",
"prompt": "a golden retriever surfing on a wave",
"size": "1024x1024",
"n": 1
}
Response:
{
"created": 1741460000,
"data": [{ "url": "http://localhost:8402/images/abc123.png" }]
}
Display inline: 
| Model | Full ID | Price |
|---|
| Sizes |
|---|
| Best for |
|---|
nano-banana | google/nano-banana | $0.05 | 1024×1024, 1216×832, 1024×1792 | Default — fast, cheap, good quality |
banana-pro | google/nano-banana-pro | $0.10 | up to 4096×4096 | High-res, large format |
dall-e-3 | openai/dall-e-3 | $0.04 | 1024×1024, 1792×1024, 1024×1792 | Photorealistic, complex scenes |
gpt-image | openai/gpt-image-1 | $0.02 | 1024×1024, 1536×1024, 1024×1536 | Budget option |
flux | black-forest/flux-1.1-pro | $0.04 | 1024×1024, 1216×832, 832×1216 | Artistic styles, fewer restrictions |
Choosing a model:
nano-bananabanana-prodall-e-3fluxChoosing a size:
1024x10241024x17921792x1024 (dall-e-3) or 1216x832 (nano-banana / flux)2048x2048 or 4096x4096 with banana-pro onlyPOST to http://localhost:8402/v1/images/image2image:
{
"model": "openai/gpt-image-1",
"prompt": "make the background a snowy mountain landscape",
"image": "https://example.com/photo.jpg",
"size": "1024x1024",
"n": 1
}
ClawRouter automatically downloads URLs and reads local file paths — pass them directly, no manual base64 conversion needed.
Optional mask field: a second image (URL or path) that marks which areas to edit (white = edit, black = keep).
Response is identical to generation:
{
"created": 1741460000,
"data": [{ "url": "http://localhost:8402/images/xyz456.png", "revised_prompt": "..." }]
}
Supported models for editing: openai/gpt-image-1 only ($0.02)
User: Draw me a cyberpunk city at night
→ POST to /v1/images/generations, model nano-banana, prompt as given.
User: Generate a high-res portrait of a samurai
→ POST to /v1/images/generations, model banana-pro, size 1024x1792.
User: Edit this photo to add a sunset background: https://example.com/portrait.jpg
→ POST to /v1/images/image2image, model gpt-image, image = the URL, prompt = "add a warm sunset background".
User: Change the background in my image to a beach (attaches local file)
→ POST to /v1/images/image2image, image = the local file path, prompt describes the change.
flux or nano-banana for more flexibilitygpt-image-1; generation supports all 5 models