A quick script that fetches random data from https://myjson.com (great place by the way)

generate_json.py

#!bin/python3
import sys
import random
from string import digits, ascii_uppercase, ascii_lowercase
from requests import get

base_url = "https://api.myjson.com/bins/"

def gen():
    return ''.join([random.choice(digits + ascii_lowercase) for x in range(5)])

def a(amount, write = False):
    out = list()
    i = 0
    while i <= amount:
        key = gen()
        text = get(base_url + key).text
        if str(text) == '{"status":404,"message":"Not Found"}':
          pass
        else:
            if write == "write":
                open(key + ".json", "w").write(text)
                out.append(key + ".json")
            else:
                out.append(text)
            i += 1
    return out
  
if len(sys.argv) < 1:
    print("Not enough args")
    exit()
else:
    print(a(int(sys.argv[1]), sys.argv[2])) 

Supports writing to files