missing minute data from coinApi

Question

I'm not sure if this is a problem with my coding or maybe I should rather ask CoinAPI this question directly. If I want to get some minute data from a coin, some data appears to be simply missing. In the picture with the output of my code you can see, that the data for the minute at 2018-05-31T23:42 is missing. Do you know a better site with historical crypto minute data? This is my code:

import requests
symbol_id = 'BINANCE_SPOT_IOTA_USDT'
period_id = '1MIN'
limit = '5'
time_start='2018-05-31T23:40:00'
headers = {'X-CoinAPI-Key' : 'My CoinAPI-Key'}
response = requests.get(
f'https://rest.coinapi.io/v1/ohlcv/{symbol_id}/history?period_id={period_id}&time_start={time_start}&limit={limit}',
headers=headers)
print(response.text)

Thank you!

Answer 1

CoinAPI provides an additional parameter called period_id which accepts the units second/minute/hour/day/month/year. Data can be requested by the period.

period_id	parameter
Second	1SEC, 2SEC, 3SEC, 4SEC, 5SEC, 6SEC, 10SEC, 15SEC, 20SEC, 30SEC
Minute	1MIN, 2MIN, 3MIN, 4MIN, 5MIN, 6MIN, 10MIN, 15MIN, 20MIN, 30MIN
Hour	1HRS, 2HRS, 3HRS, 4HRS, 6HRS, 8HRS, 12HRS
Day	1DAY, 2DAY, 3DAY, 5DAY, 7DAY, 10DAY
Month	1MTH, 2MTH, 3MTH, 4MTH, 6MTH
Year	1YRS, 2YRS, 3YRS, 4YRS, 5YRS

import requests
url = 'https://rest.coinapi.io/v1/ohlcv/BTC/USD/history?period_id=1MIN&time_start=2016-01-01T00:00:00&period_id=1MIN'
headers = {'X-CoinAPI-Key' : '01E867A9-BB46-4A45-A1B4-BE140767040E'}
response = requests.get(url, headers=headers)
print(response.text)

{
    "time_period_start": "2016-01-01T00:00:00.0000000Z",
    "time_period_end": "2016-01-01T00:01:00.0000000Z",
    "time_open": "2016-01-01T00:00:16.0000000Z",
    "time_close": "2016-01-01T00:00:16.0000000Z",
    "price_open": 430.350000000,
    "price_high": 430.390000000,
    "price_low": 430.350000000,
    "price_close": 430.390000000,
    "volume_traded": 0.072700000,
    "trades_count": 4
  },
  {
    "time_period_start": "2016-01-01T00:01:00.0000000Z",
    "time_period_end": "2016-01-01T00:02:00.0000000Z",
    "time_open": "2016-01-01T00:01:01.1500000Z",
    "time_close": "2016-01-01T00:01:46.0000000Z",
    "price_open": 430.890000000,
    "price_high": 430.890000000,
    "price_low": 430.380000000,
    "price_close": 430.400000000,
    "volume_traded": 1.028431010,
    "trades_count": 7
  },