That HTTPS transfer works with a current version of curl, on OS 3.2.2:
curl
https://www.alphavantage.co/query?function=TIME_SERIES_DAILY&symbol=MSFT&datatype=csv&apikey=YOURKEY -o RAM:msft.csv -s
Resulting stock data is:
timestamp,open,high,low,close,volume
2025-12-26,486.7050,488.1200,485.9600,487.7100,8842175
2025-12-24,485.6800,489.1625,484.8300,488.0200,5855880
2025-12-23,484.9800,487.8300,484.7400,486.8500,14683582
2025-12-22,486.1200,488.7300,482.6900,484.9200,16963019
2025-12-19,487.3600,487.8500,482.4900,485.9200,70836105
2025-12-18,478.1900,489.6000,477.8900,483.9800,28573545
etc...
Download from:
http://aminet.net/package/comm/tcp/curl-8.18-DEV-18112025Also needs current AmiSSL installed.