CheckPrice Server

Node.js Express server that checks eBay prices and notifies via Telegram.

Features

• Runs a scheduled check every minute
• Gets eBay access token automatically using refresh token
• Searches eBay items by keyword
• Notifies Telegram group when items are found below price threshold ($650 USD)

Setup

1. Install dependencies:

   npm install
   

2. Configure .env file:

   EBAY_CLIENT_ID=your_client_id
   EBAY_CLIENT_SECRET=your_client_secret
   EBAY_REFRESH_TOKEN=your_refresh_token
   TELEGRAM_BOT_TOKEN=your_bot_token
   TELEGRAM_CHAT_ID=your_chat_id
   PORT=3000
   

3. Run the server:

   npm start
   

Configuration

• PRICE_THRESHOLD: Edit in src/index.js to change the price threshold (default: $650 USD)
• Keywords: Edit the keywords array in the cron job section to search for different items

API Endpoints

• GET /health - Health check
• POST /check - Manual trigger with keyword

  { "keyword": "your-search-term" }
  

How It Works

1. Every minute, the server runs checkAndNotify() function
2. Calls getEbayAccessToken() to get a valid access token
3. Calls searchEbayItems() to search eBay for items
4. Filters items with price below $650 USD
5. Sends notification to Telegram if cheap items found