CoinMarketCap API - Cryptoscan

A real-time cryptocurrency price and information tracker that monitors both centralized (CEX) and decentralized (DEX) exchanges.

Current Price: $450 Contacts: https://t.me/dan_cryptoscan

What you get:

• Free setup into your hosting
• Free help to integrate app to your server
• Full access to the codebase and code updates
• Free updates for app, you can request for free updates via access to issues
• Full access to Project Time tracking by developers

Features

• Real-time price monitoring for both CEX and DEX tokens
• Automatic data refresh based on liquidity groups
• WebSocket broadcasting of price updates
• Rate limiting and queue management for API requests
• Proxy support for reliable data fetching
• REST API endpoint for grouped coin data

Architecture

Core Components

1. Price Fetching

   • CEX prices via cryptoscan.pro API
   • DEX prices via CoinMarketCap's dexscan
   • Proxy rotation system for reliable scraping

2. Data Management

   • File-based storage using FileMap
   • Grouped by symbol and exchange
   • Price change detection and broadcasting

3. Rate Limiting

   • Concurrent request management (100 concurrent requests)
   • Dynamic update intervals based on liquidity groups:
     • Ultra Low Liquidity: 60 minutes
     • Very Low Liquidity: 10 minutes
     • Low Liquidity: 60 seconds
     • Medium Liquidity: 30 seconds
     • High Liquidity: 10 minutes

API Reference

GET /

Returns all coins grouped by symbol and exchange name.

Response format:

{
  "[symbol]": {
    "[exchangeName]": [
      {
        // coin data
      }
    ]
  }
}

WebSocket Updates

The system broadcasts real-time price updates when changes are detected. Connect to the WebSocket endpoint to receive live updates.

Environment Variables

• CRYPTOSCAN_API_KEY: API key for proxy service
• API_KEY: CoinMarketCap API key

Installation

npm install

Running the Project

Development:

npm run start:debug

Production:

npm run start

Tests:

npm test

Dependencies

• @javeoff/proxy-fetch: Proxy rotation for requests
• @javeoff/file-map: File-based data storage
• hono: Web framework
• jsdom: DOM parsing for scraping
• p-queue: Queue management
• bottleneck: Rate limiting
• groupby-esm: Data grouping utility

License

ISC