API for horse racing too slow to bet on live racing and only one horse odds per run

[stephanmorel]

I'm enquiring about help with the api for horseracing based on the free api key, essentially not only is it 3 seconds before I get any kind of odds or python output which is a detriment if I want to do betting with live races but also it only allows me to get one horses odds at a time regardless if I use a for loop and try and chain requests. Is this a code issue or betfair issue?
payload = 'username=' + my_username + '&password=' + my_password
headers = {'X-Application': my_app_key, 'Content-Type': 'application/x-www-form-urlencoded'}
resp = requests.post('https://identitysso-cert.betfair.com/api/certlogin',data=payload,cert=('c:/Users/steph/OneDrive/Documents/2023/WORK/BETTING/client-2048.crt','c:/Users/steph/OneDrive/Documents/2023/WORK/BETTING/client-2048.pem.'),headers=headers)
json_resp=resp.json()
print(json_resp['loginStatus'])
SSOID = json_resp['sessionToken']
bet_url="https://api.betfair.com/exchange/betting/json-rpc/v1"
event_req = '{"jsonrpc": "2.0", "method": "SportsAPING/v1.0/listEventTypes", "params": {"filter":{ "eventTypeIds":["7"],"marketCountries":["GB","AU"]}}, "id": 1}'
headers = {'X-Application': my_app_key, 'X-Authentication': SSOID, 'content-type': 'application/json'}
req = requests.post(bet_url, data=event_req.encode('utf-8'), headers=headers)

[jabe]

The development key comes with a built-in delay. You're encouraged to get the paid-for key.