{"name":"Image API","endpoints":{"/watermark-direct":"直接返回添加水印后的图片 (POST)","/watermark":"通过URL参数添加水印 (GET)"},"examples":{"post":{"url":"https://example.com/image.jpg","text":"水印文字","watermarkImageUrl":"https://example.com/logo.png","position":"bottomright","widthRatio":0.3,"marginRatio":0.03,"opacity":0.9},"get":"GET /watermark?url=https://example.com/image.jpg&watermarkImageUrl=https://example.com/logo.png&position=bottomright&widthRatio=0.3&marginRatio=0.03&opacity=0.9"}}