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GPT Image API b64_json Workflow for Developers

· 약 2분
AI Supermarket
AI Supermarket
AI API Gateway Docs

Image generation SEO is competitive, but developer-specific phrases are much more focused. A phrase like GPT image API b64_json targets someone who already has code open and wants an implementation detail.

AI Supermarket exposes OpenAI-compatible image generation through:

https://aisupermarket.work/v1/images/generations

curl Example​

curl -s -X POST "https://aisupermarket.work/v1/images/generations" \
  -H "Authorization: Bearer your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-image-2",
    "prompt": "A clean SaaS dashboard hero image for an AI API gateway",
    "size": "1024x1024",
    "quality": "medium",
    "n": 1,
    "response_format": "b64_json"
  }' | jq -r '.data[0].b64_json' | base64 --decode > ai-image.png

Python Example​

from openai import OpenAI
import base64

client = OpenAI(
    api_key="your-api-key",
    base_url="https://aisupermarket.work/v1",
)

response = client.images.generate(
    model="gpt-image-2",
    prompt="A clean SaaS dashboard hero image for an AI API gateway",
    size="1024x1024",
    n=1,
)

image_bytes = base64.b64decode(response.data[0].b64_json)
with open("ai-image.png", "wb") as f:
    f.write(image_bytes)

Troubleshooting​

If the request fails:

  • confirm the Key group supports image generation
  • check the model name with /v1/models
  • start with one image and medium quality
  • confirm your JSON body is valid
  • confirm the response actually contains data[0].b64_json