competitor-price-monitor

Competitor Price Monitoring Radar

Automatically monitor competitor pricing pages, detect price changes, and send notifications.

Trigger Conditions

Start this skill when the user says the following:

• "Monitor competitor prices"
• "Check competitor pricing changes"
• "competitor price monitor"
• "Price change alert"

Workflow

┌─────────────────┐    ┌─────────────────┐    ┌─────────────────┐
│  读取竞品列表    │───▶│  抓取价格信息    │───▶│  对比历史数据    │
│  (JSON/CSV)     │    │  (WebFetch)     │    │  (本地缓存)     │
└─────────────────┘    └─────────────────┘    └─────────────────┘
                                                      │
                              ┌───────────────────────┴───────────────────────┐
                              ▼                                               ▼
                    ┌─────────────────┐                             ┌─────────────────┐
                    │  价格无变化      │                             │  检测到变化      │
                    │  更新检查时间    │                             │  生成报告+通知   │
                    └─────────────────┘                             └─────────────────┘

Execution Steps

Step 1: Prepare the competitor list

Check whether the user has provided a list of competitor URLs. If not, create a sample configuration file:

// competitors.json
{
  "competitors": [
    {
      "name": "竞品A",
      "pricing_url": "https://example.com/pricing",
      "last_pricing": "",
      "last_check": ""
    }
  ]
}

Step 2: Scrape price information

For each competitor URL:

1. Use WebFetch to retrieve the page content
2. Extract price-related information, including:
   • Names of each plan
   • Monthly/annual pricing
   • Key features (top 3)
3. Generate a structured price summary

Prompt Template(for analyzing the page):

这是一个定价页面。请简洁地总结所有套餐计划：

对于每个套餐，列出：
1. 套餐名称
2. 月付价格
3. 年付价格（如有）
4. 前3个主要功能

返回格式：
- 套餐名: [名称]
  - 月付: $XX
  - 年付: $XX/年
  - 功能: 功能1, 功能2, 功能3

Step 3: Compare with historical data

Read the locally cached historical price data and compare it with the newly scraped data:

• [NEW]: First scrape, no historical data
• [SIMILAR]: No substantial price change
• [DIFF]: Price change detected

Step 4: Update the cache and notify

1. Save the new price data to a local JSON file
2. If a change is detected ([DIFF]), generate a change report:

## 竞品价格变动报告

**竞品**: [名称]
**URL**: [链接]
**检测时间**: [时间戳]

### 变动详情
- [具体变动描述]

### 当前价格
[最新价格摘要]

Data Storage

The price history cache is saved at:~/.claude/cache/competitor-prices.json

{
  "last_updated": "2025-12-29T10:00:00Z",
  "competitors": {
    "example.com": {
      "name": "竞品A",
      "url": "https://example.com/pricing",
      "pricing_summary": "...",
      "last_check": "2025-12-29T10:00:00Z"
    }
  }
}

Usage Examples

Example 1: Monitor a single competitor

用户: 帮我监控 https://example.com/pricing 的价格变化

Claude:
1. 访问 example.com/pricing 页面
2. 提取价格信息
3. 与历史记录对比
4. 返回结果报告

Example 2: Batch monitoring

用户: 监控这些竞品的价格：
- https://zapier.com/pricing
- https://make.com/pricing
- https://pipedream.com/pricing

Claude:
1. 依次访问每个定价页面
2. 提取并对比价格
3. 汇总生成报告

Dependencies

• WebFetch: Scrape web page content
• Read/Write: Read and write local cache files
• Bash: Create directories, timestamps, etc.

Limitations

• Some websites may have anti-scraping mechanisms, and WebFetch may not be able to retrieve the full content
• Dynamically loaded prices (requiring JavaScript execution) may not be scraped correctly
• It is recommended to periodically manually verify the accuracy of the scraped results