Crypto Exchange API and Real-time pricing

1. API server sends updates to you. Learn the API and look for something like websockets. May be this https://github.com/bitmax-exchange/api-doc/blob/master/bitmax-api-doc-v1.2.md#websocket-api or this https://www.programmableweb.com/api/bitmax-websocket-pushstreaming-api is what you need.
2. Create own service that pulls pricing with some interval.

Try also google: bitmax websockets api

The CoinMarketCap API is used here, the real time price is generated every time you run the code. This code generated 100 cryptos and their details some altcoins were not generated by the API.

## Code to display tokens and their price using CoinMarketCap API
# Note: Some altcoins are not displayed by this API.

from coinmarketcapapi import CoinMarketCapAPI

# Register on https://coinmarketcap.com/ to get your API
API_KEY = "AAAAAAAA-BBBB-CCCC-DDDD-EEEEEEEE" # Enter you API here
coin_market_cap = CoinMarketCapAPI(API_KEY)

raw_data = coin_market_cap.cryptocurrency_listings_latest()

all_data = raw_data.data[:]

print("S/N\tID\tCryptocurrency\t\tSymbol\tPrice(USD)\tDate Added\tCirculating 
          Supply\tTotal Supply")
print('------------------------------------------------------------------------')

for index in range(len(all_data)):
     coin_id = all_data[index]['id']
     coin_name = all_data[index]['name']
     coin_symbol = all_data[index]['symbol']
     coin_date_added = all_data[index]['date_added'][:10]
     coin_supply = all_data[index]['total_supply']
     quote = (((all_data[index])['quote'])['USD'])['price']
     coin_circ_supply = all_data[index]['circulating_supply']
     coin_max_supply = all_data[index]['max_supply']
     serial = index+1
     
     print("{0:3} {1:7} \t{2:16} \t {3:5} \t {4:8.2f} \t{5:12} \t{6:12.1f} \t\t{7:}"
          .format(serial, coin_id, coin_name, coin_symbol, quote, coin_date_added, 
                  coin_circ_supply, coin_max_supply))