Monitoring a crypto portfolio in real time is critical for staying ahead in fast-moving markets. Delayed price updates can lead to missed opportunities, especially when volatility spikes and assets like Bitcoin or Ethereum shift by 10% in minutes. A real-time portfolio tracker solves this by delivering live USD prices and 24-hour volumes for selected holdings, complete with visual alerts for price changes.
This guide focuses on building exactly that: a streamlined web dashboard that provides instant market insights without manual refreshes, all powered by Coinranking’s WebSocket API and Replit’s AI-driven development platform.
No coding skills are needed—just clear prompts and about 20 minutes to create a functional, deployed app. This tutorial outlines the setup, API access, and precise prompts to help developers, traders, or enthusiasts create a low-maintenance tool for smarter portfolio tracking.
Why Real-Time Data Enhances Portfolio Tracking
Most REST APIs update every minute, which falls short for capturing intraday market shifts in crypto. Coinranking’s WebSocket API delivers live price and volume updates as they happen, enabling a tracker that stays in sync with the market. By connecting once and subscribing to up to 100 coins, users receive focused data without extraneous noise, ideal for portfolio monitoring.
The WebSocket stream is throttled (every 1 second by default), ensuring responsiveness without overwhelming resources. Access to this feature requires a Coinranking Professional plan, offering reliable, high-frequency data for projects of any size.
Step 1: Set Up Replit
Replit is a free, browser-based platform that simplifies app development from prototype to deployment. Visit replit.com and sign up to get started. From the homepage in Replit’s dashboard, you’ll use the chat window in a later step to transform plain-English instructions into complete apps, including frontend designs and backend connections.
Step 2: Obtain Your Coinranking API Key
To use the WebSocket API, sign up at Coinranking API and generate an API key. WebSocket access requires a professional or higher plan—explore options on the pricing page to match your needs. After obtaining your key, note the unique identifiers (UUIDs) for your coins: Bitcoin is Qwsogvtv82FCd, and Ethereum is razxDUgYGNAdQ. These UUIDs will be used in your prompts to subscribe to specific assets.
Step 3: Create the Portfolio Tracker in Replit
Replit’s AI interface lets you describe your app in plain English, handling everything from WebSocket connections to UI rendering. Use the core endpoint (wss://api.coinranking.com/v2/real-time/rates) and authenticate with your API key as a query parameter.
Below is a single, optimized prompt designed to leverage Replit’s capabilities fully, incorporating specificity and context to produce a polished, feature-rich portfolio tracker. Copy-paste it into Replit’s AI interface (as shown above), insert your API key and UUIDs, and it will generate and deploy the app:
Create a professional, responsive web app for real-time crypto portfolio tracking using React and Tailwind CSS for a modern, dark-themed UI. Connect to Coinranking's WebSocket API at wss://api.coinranking.com/v2/real-time/rates, authenticating with my API key as a query parameter (x-access-token). Subscribe to Bitcoin (UUID: Qwsogvtv82FCd) and Ethereum (UUID: razxDUgYGNAdQ) with a 1-second throttle for high-frequency updates. Display live USD prices and 24-hour volumes in clean, grid-based cards, showing percentage changes since the last update (green for 0% or higher, red for below 0%). Include a dynamic banner for price alerts on moves exceeding 2%. Calculate and display total portfolio value assuming holdings of 0.5 BTC and 5 ETH, updating in real time. Add a toggle for light/dark mode, a manual reconnect button for WebSocket recovery, and a loading spinner during initial connection. Ensure mobile-first design with smooth animations for price updates. Store the API key securely in environment variables. Deploy the app to a live, shareable URL and provide a debug log in the console for WebSocket connection status. If errors occur, suggest fixes in the Replit interface for iterative refinement.
Once generated, test the app in Replit’s live preview. To refine it, reply in the interface with requests like “Add a manual refresh button” or “Include a subscription for another coin.” The app deploys to a shareable Replit URL, accessible from any device.
Your Real-Time Crypto Portfolio Tracker Is Live—What’s Next?
You’ve just built a live crypto portfolio tracker that delivers real-time prices and alerts without writing a single line of code. Coinranking’s WebSocket API powers instant updates, and Replit’s AI brings it to life in minutes. Start with the prompt above, upgrade to a professional plan, and extend it later with features like price charts or more coins. Share your live tracker on X and tag us (@coinranking)—we’d love to see it!
Coinranking API Team