```python
import requests

url = "https://api.example.com/write"
headers = {
'Authorization': 'Bearer YOUR_API_KEY',
}
data = {
'prompt': 'Write a short story about a cat.'
}

response = requests.post(url, headers=headers, json=data)

if response.status_code == 200:
print(response.json())
else:
print(f"Error: {response.status_code}")
```

注意：这只是一个基本的示例，实际使用时需要根据具体的API文档进行调整。