Script to get total ethereum market cap - including the marketcap of all tokens on Ethereum!

eth_token_marketcap.py

"""
Script to get total ethereum market cap - including the marketcap of all tokens on Ethereum!
Script expects existence of API_KEY in environment vars for coinmarketcap api 
---
Output from last run on 2021-03-14:

Retrieved 4328 cryptocurrencies
Retrieved 2693 Ethereum tokens
Total token market cap: $192,452,534,460.19403
Total Ethereum market cap: $217,180,649,459.69635
Total total Ethereum market cap: $409,633,183,919.8904
"""

import requests

import os
API_KEY = os.environ['API_KEY']

HEADERS = {
    'Accepts': 'application/json',
    'X-CMC_PRO_API_KEY': API_KEY,
}

def get_cryptos():
    crypto_list_url = 'https://pro-api.coinmarketcap.com/v1/cryptocurrency/listings/latest'
    parameters = {
      'start':'1',
      'limit':'5000',
    }

    response = requests.get(crypto_list_url, params=parameters, headers=HEADERS)
    if not response.ok:
        print("Nahyo, response no bueno. Exiting")
        exit(1)

    data = response.json()['data']
    print(f'Retrieved {len(data)} cryptocurrencies')

    return data


if __name__ == '__main__':
    data = get_cryptos()
    tokens = [d for d in data if d['platform'] and d['platform']['symbol'] == 'ETH']
    print(f'Retrieved {len(tokens)} Ethereum tokens')

    token_market_cap = sum([d['quote']['USD']['market_cap'] for d in tokens])
    print(f'Total token market cap: ${token_market_cap:,}')

    eth = [d for d in data if d['symbol'] == 'ETH'][0]
    eth_market_cap = eth['quote']['USD']['market_cap']
    print(f"Total Ethereum market cap: ${eth_market_cap:,}")

    print(f"Total total Ethereum market cap: ${eth_market_cap + token_market_cap:,}")