I have a Wordpress website that exposes APIs to get content. I have access to the admin console but I don't know how to find the interface / documentation. How do I do that? Any pointers will be greatly appreciated. Thank you.
You'll want to open WP-ADMIN by adding /wp-admin to the end of your WordPress installation's URL and once you're there expand the Settings Panel > Click Writing and scroll down to the section labeled Remote Publishing and note the Atom Publishing Protocol and XML-RPC.
For more info please see the WordPress Codex documentation on Settings Writing Screen.