Interactively, when adding a "Link" using the "[+]" icon on the right-hand panel, you are presented a UI to either enter a URL ("Connect a URL") or a series of "Add Relationships" (Link Task, Waiting On, etc...)

The existing API endpoint for /task/{task_id}/link/{links_to} allows for adding a Linked Task, but all the other options (available from the UI) are not yet available. It would be great to expand the type of Links added from the API, prioritizing the "Connect a URL" options first, with input values for both the (a) label/prompt/title and (b) the URL --- to mimic the UI input.