This is a great resource, my currency API [1] has actually been on this list for a while! One thing that amazes me though is some of the places people rely on

This is a great resource, my currency API [1] has actually been on this list for a while! One thing that amazes me though is some of the places people rely on free services. As someone who has run a free and open access API for over 10 years now it never ceases to amaze me how people integrate free services into critical production code and high volume, high availability contexts. Sometimes I can see from my logs and sometimes because users end up contacting me - developers happily include the version of my API that doesn't require any API key [2] in large corporate ERPs, apps in the Atlassian app store, shopping carts of super high volume e-commerce stores etc. etc. Obviously I take great care in how my free APIs are provisioned and monitored, but it is still shocking to me that people just pick an API off a list and then rely on it in a system that probably cost millions in developer salaries to build... [1] https://www.exchangerate-api.com https://www.exchangerate-api.com [2] https://www.exchangerate-api.com/docs/free https://www.exchangerate-api.com/docs/free