I've read the documentation and I'm still a little confused as to how I begin using the Jira REST API. I am a new member of my company's Jira instance and they have tasked me with developing an external plugin which leverages some of the data available with the API. I don't know too much about how the software is set up other than it appears that we are not hosting it in-house. I'm very familiar with how REST endpoints work, JSON, and all of that I just don't know if everything is already accessible and if so, at what URL.
Thank you in advance!