Build a Crypto Portfolio Dashboard with API: Step-by-Step

A real-time portfolio dashboard is one of the best projects to learn crypto API integration. This tutorial walks through building one from scratch.

Architecture Overview

Your dashboard will: fetch prices via API → calculate portfolio value → display in a web UI. Refresh every 60 seconds.

portfolio = {
  "bitcoin": 0.5,
  "ethereum": 5.0,
  "solana": 50,
  "usdc": 1000
}

curl -H "x-api-key: YOUR_KEY"   https://cryptodata-api.datachain.workers.dev/api/price?coins=bitcoin,ethereum,solana,usdc

Multiply each holding by current price, sum total, compare to cost basis. The CryptoBoss portfolio tracker endpoint does this automatically.