A new report from The Information (subscription required), reveals that Apple is preparing to release a Siri SDK for third-party developers, as well as possibly releasing a standalone Siri-capable hardware device, similar to the Amazon Echo. The report suggests that a Siri SDK will likely be unveiled at WWDC next month, allowing third-party developers to make services available directly through Siri — something that many iOS developers and users have been hoping to see since Siri was first introduced by Apple five years ago.

While Apple has provided direct integration with a small number of third-party services like OpenTable and Shazam, and “deep links” introduced in iOS 9 last year provide some integration for searches to open within apps, an open SDK would likely allow any iOS developer the ability to tie Siri requests directly into their own apps.
The report notes that the Siri hardware device is likely a little farther off, although sources suggest that the device has been in development by Apple since before the Amazon Echo was introduced last year.
The Siri hardware device is expected to include a speaker and be web-connected. It should also include deep integration with HomeKit — a feature still lacking on even the fourth-generation Apple TV — and the device should be able to use AirPlay.