- Add ``/account``, ``/account/register``, and ``/account/logout`` to authenticate with the identity server. (`#2255 <https://github.com/matrix-org/matrix-doc/issues/2255>`_)
- Add endpoints for accepting and handling terms of service. (`#2258 <https://github.com/matrix-org/matrix-doc/issues/2258>`_)
- Add ``/hash_details`` and a new ``/lookup`` endpoint for performing hashed association lookups. (`#2287 <https://github.com/matrix-org/matrix-doc/issues/2287>`_)
Backwards Compatible Changes
----------------------------
- Deprecate the v1 API in favour of an authenticated v2 API. (`#2254 <https://github.com/matrix-org/matrix-doc/issues/2254>`_)