如果您想使用关键词搜索API接口获取到快手的商品，可以通过以下步骤实现：
1. 首先注册账号。根据文档申请相应的接口权限。
2. 确定需要使用的API接口。对于商品搜索，您可以查看相关的API文档以获取参数和请求方法。
3. 根据API文档中提供的接口地址、参数等信息，发送HTTP请求。您可以使用一些编程语言或工具来发送请求，例如Python中的requests模块。
4. 处理API返回的数据。
以下是一个简单的Python示例代码，演示了如何使用关键词搜索获取到快手的商品：
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"detail_url": "https://item.taobao.com/item.htm?id=715309411100" }, { "title": "2023年新款真无线蓝牙耳机官方原装正品适用华为降噪荣耀运动专用", "pic_url": "https://img.alicdn.com/img/bao/uploaded/i4/i2/3963398492/O1CN01jxhULL2CbOCtLRclf_!!3963398492.jpg", "promotion_price": "99.00", "price": "99.00", "sales": 50000, "num_iid": "696501342344", "seller_nick": "SCOLiB旗舰店", "detail_url": "https://item.taobao.com/item.htm?id=696501342344" }, { "title": "真无线蓝牙耳机双耳运动型入耳式高音质高端2022年新款男女士款降噪高颜值征骑兵tws适用于苹果vivo华为oppo", "pic_url": "https://img.alicdn.com/img/bao/uploaded/i4/i1/2452576239/O1CN01vjOSDs1vxVsrO3HNt_!!2452576239.jpg", "promotion_price": "399.00", "price": "399.00", "sales": 4000000, "num_iid": "574341397520", "seller_nick": "征骑兵旗舰店", "detail_url": "https://item.taobao.com/item.htm?id=574341397520" }, { "title": "骨传导蓝牙耳机真无线不入耳2023年新款高端睡眠久戴不痛超长续航", "pic_url": "https://img.alicdn.com/img/bao/uploaded/i4/i3/2208306095661/O1CN010D7C1A1rgmxmLWmwz_!!0-item_pic.jpg", "promotion_price": "99.00", "price": "99.00", "sales": 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"https://img.alicdn.com/img/bao/uploaded/i4/i4/3937219703/O1CN01TkwPft2LY1s3TsmZx_!!3937219703-0-C2M.jpg", "promotion_price": "82.50", "price": "82.50", "sales": 50000, "num_iid": "703144743016", "seller_nick": "天天特卖工厂店", "detail_url": "https://item.taobao.com/item.htm?id=703144743016" }, { "title": "适用于苹果14/13/12/11有线耳机iPhone8plus/XR/7/XS/MAXPro974", "pic_url": "https://img.alicdn.com/img/bao/uploaded/i4/i4/2616970884/O1CN012gUhJ21IOuxFrOlyx_!!0-item_pic.jpg", "promotion_price": "26.80", "price": "26.80", "sales": 50000, "num_iid": "691613466460", "seller_nick": "苏宁易购官方旗舰店", "detail_url": "https://item.taobao.com/item.htm?id=691613466460" }, { "title": "蓝牙耳机真无线适用苹果13华强北2023年新款四三二代iPhone12降噪", "pic_url": "https://img.alicdn.com/img/bao/uploaded/i4/i1/2207307928536/O1CN014kGynx2CvXefBmVmx_!!0-item_pic.jpg", "promotion_price": "256.00", "price": "256.00", "sales": 1000000, "num_iid": "636491940855", "seller_nick": "bizoe佰卓旗舰店", "detail_url": 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