How to fetch ETH/USD price from the coinmarketcap api

Question

I want to fetch the current ETH-USD price from this api (https://api.coinmarketcap.com/v1/ticker/ethereum/?convert=USD). How do I fetch just the price into a variable in PHP for reuse on my application?

Answer 1

You're going to have to access the url, read the contents of the url, and then turn the contents into an object or array (in this case it'll be an array).

<?php

  $url = 'https://api.coinmarketcap.com/v1/ticker/ethereum/?convert=USD';
  $data = file_get_contents($url);
  $priceInfo = json_decode($data);

  echo $priceInfo[0]->price_usd;

?>

The price_usd can be changed depending on what data you want to grab. For example, this code would give you $463.531.

Answer 2

Coinmarketcap is starting to charge for API. Perhaps you could have a look at CoinGecko API instead: https://api.coingecko.com/api/v3/coins/markets?vs_currency=usd&ids=ethereum

Here is the api docs: https://www.coingecko.com/api/docs/v3