If you want to implement the DeadlineAPI for your conference you need to do the following:
Add all fields you want to the json file. You can find the official fields in the schema documentation. Feel free to add your own fields, but ideally prefix custom fields with
ext_ to mark them as extension fields. Otherwise you might have conflicts with later schema versions.
Of course the fun starts with providing an endpoint with dynamic data. Either you can write a piece of software yourself or use software written by the DeadlineAPI community.
In case you down want to run your own endpoint but still want to share deadlines with the community. We run our own endpoint under endpoint.deadlineapi.org and you can participate via PullRequest into the endpoint GitHub repository.