Using a POST request would make sense in other ways, too. The endpoint could represent a timeline of all the honks that have occurred, and by POSTing to it you

Using a POST request would make sense in other ways, too. The endpoint could represent a timeline of all the honks that have occurred, and by POSTing to it you are creating a honk at the current time. On the other hand, PUT would make sense if you were specifying the time you wanted the honk to occur at as a parameter (and likewise that would be idempotent).