Nano Banana 2 来了：Gemini 3.1 Flash Image API 接入指南

import os
import time
import requests

API_KEY = os.environ["EVOLINK_API_KEY"]
BASE_URL = "https://api.evolink.ai/v1"
MODEL = "gemini-3.1-flash-image-preview"

# 步骤 1：提交图像生成任务
response = requests.post(
    f"{BASE_URL}/images/generations",
    headers={
        "Authorization": f"Bearer {API_KEY}",
        "Content-Type": "application/json"
    },
    json={
        "model": MODEL,
        "prompt": "A professional product photo of a smartwatch on a dark reflective surface, studio lighting",
        "quality": "2K",
        "size": "1:1"
    }
)

task = response.json()
task_id = task["id"]
print(f"Task submitted: {task_id}")

# 步骤 2：轮询获取结果
while True:
    status_resp = requests.get(
        f"{BASE_URL}/tasks/{task_id}",
        headers={"Authorization": f"Bearer {API_KEY}"}
    )
    result = status_resp.json()
    if result["status"] == "completed":
        print(f"Image URL: {result['output']['image_url']}")
        break
    elif result["status"] == "failed":
        print(f"Task failed: {result.get('error', 'Unknown error')}")
        break
    time.sleep(3)

const API_KEY = process.env.EVOLINK_API_KEY;
const BASE_URL = 'https://api.evolink.ai/v1';
const MODEL = 'gemini-3.1-flash-image-preview';

// 步骤 1：提交任务
const taskRes = await fetch(`${BASE_URL}/images/generations`, {
  method: 'POST',
  headers: {
    'Authorization': `Bearer ${API_KEY}`,
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    model: MODEL,
    prompt: 'A flat lay infographic explaining the water cycle, clean educational style',
    quality: '2K',
    size: '16:9',
  }),
});

const task = await taskRes.json();
console.log(`Task submitted: ${task.id}`);

// 步骤 2：轮询获取结果
while (true) {
  const res = await fetch(`${BASE_URL}/tasks/${task.id}`, {
    headers: { 'Authorization': `Bearer ${API_KEY}` },
  });
  const result = await res.json();
  if (result.status === 'completed') {
    console.log(`Image URL: ${result.output.image_url}`);
    break;
  }
  if (result.status === 'failed') {
    console.error('Task failed:', result.error);
    break;
  }
  await new Promise(r => setTimeout(r, 3000));
}

# 提交图像生成任务
curl -X POST https://api.evolink.ai/v1/images/generations \
  -H "Authorization: Bearer $EVOLINK_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gemini-3.1-flash-image-preview",
    "prompt": "A cyberpunk cityscape at night, neon reflections on wet streets, cinematic",
    "quality": "2K",
    "size": "16:9"
  }'

# 轮询任务状态
curl https://api.evolink.ai/v1/tasks/TASK_ID_HERE \
  -H "Authorization: Bearer $EVOLINK_API_KEY"

response = requests.post(
    f"{BASE_URL}/images/generations",
    headers={
        "Authorization": f"Bearer {API_KEY}",
        "Content-Type": "application/json"
    },
    json={
        "model": "gemini-3.1-flash-image-preview",
        "prompt": "Transform this photo into a watercolor painting style",
        "image_urls": [
            "https://example.com/your-photo.jpg"
        ],
        "quality": "2K"
    }
)

response = requests.post(
    f"{BASE_URL}/images/generations",
    headers={
        "Authorization": f"Bearer {API_KEY}",
        "Content-Type": "application/json"
    },
    json={
        "model": "gemini-3.1-flash-image-preview",
        "prompt": "A serene Japanese garden in autumn",
        "quality": "2K",
        "callback_url": "https://your-domain.com/webhooks/image-complete"
    }
)