Nano Banana 2 API：每张 0.25 元起，3 步接入

curl -X POST https://www.nano-banana.cn/api/ai/generate/ \
  -H "Authorization: Bearer sk-your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "mediaType": "image",
    "model": "nano-banana-2",
    "prompt": "一杯冰拿铁放在木桌上，清晨窗边的柔光",
    "scene": "text-to-image",
    "options": { "aspectRatio": "1:1", "resolution": "1K" }
  }'

# 返回
# { "code": 0, "message": "ok", "data": { "id": "3f2a1b4c-...", "status": "queuing" } }

import os, time, requests

BASE = "https://www.nano-banana.cn"
HEADERS = {"Authorization": f"Bearer {os.environ['NANO_BANANA_KEY']}"}

task = requests.post(f"{BASE}/api/ai/generate/", headers=HEADERS, json={
    "mediaType": "image",
    "model": "nano-banana-2",
    "prompt": "咖啡新品海报，顶部大标题写：秋日第一杯",
    "scene": "text-to-image",
    "options": {"aspectRatio": "3:4", "resolution": "2K"},
}, timeout=60).json()
task_id = task["data"]["id"]

while True:
    time.sleep(10)
    data = requests.post(f"{BASE}/api/ai/query/", headers=HEADERS,
                         json={"taskId": task_id}, timeout=60).json()["data"]
    if data["status"] == "success":
        print(data["outputImages"][0])
        break
    if data["status"] == "failed":
        raise RuntimeError(data)