CoinMarketCap Reveals How to Build Live Crypto Price Tracker Without API Key

CoinMarketCap has created a tutorial on how to build a live crypto price tracker using their API. The guide shows developers how to fetch current prices of Bitcoin and Ethereum, as well as display them in a user-friendly format.

The tutorial focuses on building a prototype that can be used for testing a product idea. It uses CoinMarketCap's Keyless Public API path, which makes it possible to make requests without an account or API key.

According to the guide, the first request needs no account and no API key. The /public-api path makes /v1/simple/price callable straight from Python. The Simple Price endpoint returns current USD spot prices for one or more coins, including optional fields such as 24-hour percentage change and last-updated values.

The guide also covers how to cache responses for 60 seconds, centralize rate-limit handling, and add a key later without touching the UI. It emphasizes that keyless requests share an IP-based pool with no published calls-per-minute figure, so the prototype waits 120 seconds rather than retrying immediately.