zulip/templates/zerver/api/changelog.md

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# API changelog
This page documents changes to the Zulip Server API over time. See
also the [Zulip release lifecycle][release-lifecycle] for background
on why this API changelog is important, and the [Zulip server
changelog][server-changelog].
The API feature levels system used in this changelog is designed to
make it possible to write API clients, such as the Zulip mobile and
terminal apps, that work with a wide range of Zulip server
versions. Every change to the Zulip API is recorded both here and in
**Changes** entries in the API documentation for the modified
endpoint(s).
When using an API endpoint whose behavior has changed, Zulip API
clients should check the `zulip_feature_level` field, present in the
[`GET /server_settings`](/api/get-server-settings) and [`POST
/register`](/api/register-queue) responses, to determine the API
format used by the Zulip server that they are interacting with.
## Changes in Zulip 5.0
**Feature level 113**
* `GET /realm/emoji`, `POST /realm/emoji/{emoji_name}`, [`GET
/events`](/api/get-events), [`POST /register`](/api/register-queue):
The `still_url` field for custom emoji objects is now always
present, with a value of null for non-animated emoji. Previously, it
only was present for animated emoji.
**Feature level 112**
* [`GET /events`](/api/get-events): Updated `update_message` event type
to include `stream_id` field for all edits to stream messages.
**Feature level 111**
* [`POST /subscriptions/properties`](/api/update-subscription-settings):
Removed `subscription_data` from response object, replacing it with
`ignored_parameters_unsupported`.
**Feature level 110**
* [`POST /register`](/api/register-queue): Added
`server_web_public_streams_enabled` to the response.
**Feature level 109**
* [`POST /register`](/api/register-queue), [`GET
/events`](/api/get-events), `PATCH /realm`: Added new
`enable_spectator_access` realm setting.
**Feature level 108**
* In the mobile application authentication flow, the authenticated
user's `user_id` is now included in the parameters encoded in the
final `zulip://` redirect URL.
**Feature level 107**
* [`POST /register`](/api/register-queue), [`PATCH /settings`](/api/update-settings),
[`PATCH /realm/user_settings_defaults`](/api/update-realm-user-settings-defaults):
Added user setting `escape_navigates_to_default_view` to allow users to
[disable the keyboard shortcut](/help/configure-default-view) for the `Esc` key that
navigates the app to the default view.
**Feature level 106**
* [`PATCH /user/{user_id}`](/api/update-user): Removed unnecessary JSON-encoding of string
parameter `full_name`.
**Feature level 105**
* [`POST /register`](/api/register-queue), [`PATCH
/settings`](/api/update-settings), [`PATCH
/realm/user_settings_defaults`](/api/update-realm-user-settings-defaults):
Added three new privacy settings: `send_private_typing_notifications`,
`send_stream_typing_notifications`, and `send_read_receipts`.
**Feature level 104**
* [`PATCH /realm`]: Added `string_id` parameter for changing an
organization's subdomain. Currently, this is only allowed for
changing changing a demo organization to a normal one.
**Feature level 103**
* [`POST /register`](/api/register-queue): Added `create_web_public_stream_policy`
policy for which users can create web public streams.
* [`PATCH /realm`]: Added support for updating `create_web_public_stream_policy`.
* [`POST /register`](/api/register-queue): Added `can_create_web_public_streams` boolean
field to the response.
**Feature level 102**
* [`POST /register`](/api/register-queue), `PATCH /realm`: The
`create_stream_policy` setting was split into two settings for
different types of streams: `create_private_stream_policy` and
`create_public_stream_policy`.
* [`POST /register`](/api/register-queue): The `create_stream_policy`
property was deprecated in favor of the
`create_private_stream_policy` and `create_public_stream_policy`
properties, but it still available for backwards-compatibility.
**Feature level 101**
* [`POST /register`](/api/register-queue), `PATCH /realm`: Replaced
the `allow_message_deleting` boolean field with an integer field
`delete_own_message_policy` defining which roles can delete messages
they had sent.
**Feature level 100**
* [`POST /register`](/api/register-queue), [`GET
/events`](/api/get-events): `message_content_delete_limit_seconds`
now represents no limit using `null`, instead of the integer 0, and 0 is
no longer a possible value with any meaning.
* `PATCH /realm`: One now sets `message_content_delete_limit_seconds`
to no limit by passing the string `unlimited`, rather than the
integer 0.
**Feature level 99**
* [`PATCH /realm/user_settings_defaults`](/api/update-realm-user-settings-defaults),
`PATCH /realm`: The `default_twenty_four_hour_time` parameter to
`PATCH /realm` has been replaced by the `twenty_four_hour_time` parameter
to `PATCH /realm/user_settings_defaults`, to match the new model for
user preference defaults settings.
* [`POST /register`](/api/register-queue): Removed `realm_default_twenty_four_hour_time`
from the response object. This value is now available in the
`twenty_four_hour_time` field of the `realm_user_settings_default` object.
**Feature level 98**
* [`POST /subscribe`](/api/subscribe): Added `is_web_public` parameter
for requesting the creation of a web-public stream.
* [`PATCH /streams/{stream_id}`](/api/update-stream): Added
`is_web_public` parameter for converting a stream into a web-public stream.
**Feature level 97**
* `GET /realm/emoji`, `POST /realm/emoji/{emoji_name}`, [`GET
/events`](/api/get-events), [`POST /register`](/api/register-queue):
Custom emoji objects may now contain a `still_url` field, with the
URL of a PNG still image version of the emoji. This field will only be
present for animated emoji.
**Feature level 96**
* [`PATCH /realm/user_settings_defaults`](/api/update-realm-user-settings-defaults):
Added new endpoint to update default values of user settings in a realm.
**Feature level 95**
* [`POST /register`](/api/register-queue): Added
`realm_user_settings_defaults` object, containing default values of
personal user settings for new users in the realm.
* [`GET /events`](/api/get-events): Added
`realm_user_settings_defaults` event type, which is sent when the
organization's configured default settings for new users change.
**Feature level 94**
* [`POST /register`](/api/register-queue): Added
`demo_organization_scheduled_deletion_date` field to realm data.
**Feature level 93**
* [`POST /register`](/api/register-queue), [`GET /user_groups`](/api/get-user-groups),
[`GET /events`](/api/get-events): Added `is_system_group` field to user group
objects.
**Feature level 92**
* [`GET /messages`](/api/get-messages), [`POST
/register`](/api/register-queue), [`GET /users`](/api/get-users),
[`GET /users/{user_id}`](/api/get-user), [`GET
/users/{email}`](/api/get-user-by-email): The `client_gravatar`
parameter now defaults to `true`.
**Feature level 91**
* `PATCH /realm`, [`PATCH /streams/{stream_id}`](/api/update-stream):
These endpoints now accept `"unlimited"` for `message_retention_days`,
replacing `"forever"` as the way to encode a retention policy where
messages are not automatically deleted.
**Feature level 90**
* [`POST /register`](/api/register-queue): The `unread_msgs` section
of the response no longer includes `sender_ids` in the `streams`
dictionaries. These were removed because no clients were interested
in using the data, which required substantial complexity to
construct correctly.
**Feature level 89**
* [`GET /events`](/api/get-events): Introduced the `user_settings`
event type, unifying and replacing the previous
`update_display_settings` and `update_global_notifications` event
types. The legacy event types are still supported for backwards
compatibility, but will be removed in a future release.
* [`POST /register`](/api/register-queue): Added `user_settings` field
in the response, which is a dictionary containing all the user's
personal settings. For backwards-compatibility, individual settings
will still appear in the top-level response for clients don't
support the `user_settings_object` client capability.
* [`POST /register`](/api/register-queue): Added the
`user_settings_object` property to supported `client_capabilities`.
When enabled, the server will not include a duplicate copy of
personal settings in the top-level response.
* [`GET /events`](/api/get-events): `update_display_settings` and
`update_global_notifications` events now only sent to clients that
did not include `user_settings_object` in their
`client_capabilities` when the event queue was created.
**Feature level 88**
* [`POST /register`](/api/register-queue): Added `zulip_merge_base`
field to the response.
* [`GET /events`](/api/get-events): Added new `zulip_merge_base`
field to the `restart` event.
* [`GET /server_settings`](/api/get-server-settings): Added
`zulip_merge_base` to the responses which can be used to
make "About Zulip" widgets in clients.
**Feature level 87**
* [`PATCH /settings`](/api/update-settings): Added a new
`enable_drafts_synchronization` setting, which controls whether the
syncing drafts between different clients is enabled.
* [`GET /events`](/api/get-events), [`POST /register`](/api/register-queue):
Added new `enable_drafts_synchronization` setting under
`update_display_settings`.
* [`GET /drafts`](/api/get-drafts): Added new endpoint to fetch user's
synced drafts from the server.
* [`POST /drafts`](/api/create-drafts): Added new endpoint to create
drafts when syncing has been enabled.
* [`PATCH /drafts/{draft_id}`](/api/edit-draft): Added new endpoint
to edit a draft already owned by the user.
* [`DELETE /drafts/{draft_id}`](/api/delete-draft): Added new endpoint
to delete a draft already owned by the user.
**Feature level 86**
* [`GET /events`](/api/get-events): Added `emoji_name`,
`emoji_code`, and `reaction_type` fields to `user_status` objects.
* [`POST /register`](/api/register-queue): Added `emoji_name`,
`emoji_code`, and `reaction_type` fields to `user_status` objects.
* `POST /users/me/status`: Added support for new `emoji_name`,
`emoji_code`, and `reaction_type` parameters.
**Feature level 85**
* [`POST /register`](/api/register-queue), `PATCH /realm`: Replaced `add_emoji_by_admins_only`
field with an integer field `add_custom_emoji_policy`.
**Feature level 84**
* [`POST /register`](/api/register-queue): The `enter_sends` setting
is now sent when `update_display_setting` is present in
`fetch_event_types` instead of `realm_user`.
**Feature level 83**
* * [`POST /register`](/api/register-queue): The `cross_realm_bots`
section of the response now uses the `is_system_bot` flag to
indicate whether the bot is a system bot.
**Feature level 82**
* [`PATCH /settings`](/api/update-settings) now accepts a new
`email_notifications_batching_period_seconds` field for setting the
time duration for which the server will collect email notifications
before sending them.
**Feature level 81**
* `POST /users/me/enter-sends` has been removed. The `enter_sends`
setting is now edited using the normal [`PATCH
/settings`](/api/update-settings) endpoint.
**Feature level 80**
* [`PATCH /settings`](/api/update-settings): The
`/settings/notifications` and `/settings/display` endpoints were
merged into the main `/settings` endpoint; now all personal settings
should be edited using that single endpoint. The old URLs are
preserved as deprecated aliases for backwards compatibility.
**Feature level 79**
* [`GET /users/me/subscriptions`](/api/get-subscriptions): The
`subscribers` field now returns user IDs if `include_subscribers` is
passed. Previously, this endpoint returned user display email
addresses in this field.
* `GET /streams/{stream_id}/members`: This endpoint now returns user
IDs. Previously, it returned display email addresses.
**Feature level 78**
* [`PATCH /settings`](/api/update-settings): Added
`ignored_parameters_unsupported` field, which is a list of
parameters that were ignored by the endpoint, to the response
object.
* [`PATCH /settings`](/api/update-settings): Removed `full_name` and
`account_email` fields from the response object.
**Feature level 77**
* [`GET /events`](/api/get-events): Removed `recipient_id` and
`sender_id` field in responses of `delete_message` event when
`message_type` is `private`.
**Feature level 76**
* [`POST /fetch_api_key`](/api/fetch-api-key), [`POST
/dev_fetch_api_key`](/api/dev-fetch-api-key): The HTTP status for
authentication errors is now 401. This was previously 403.
* All API endpoints now use the HTTP 401 error status for API requests
involving a deactivated user or realm. This was previously 403.
* Mobile push notifications now include the `mentioned_user_group_id`
and `mentioned_user_group_name` fields when a user group containing
the user is mentioned. Previously, these were indistinguishable
from personal mentions (as both types have `trigger="mention"`).
**Feature level 75**
* [`POST /register`](/api/register-queue), `PATCH /realm`: Replaced `allow_community_topic_editing`
field with an integer field `edit_topic_policy`.
**Feature level 74**
* [`POST /register`](/api/register-queue): Added `server_needs_upgrade`
and `event_queue_longpoll_timeout_seconds` field when fetching
realm data.
**Feature level 73**
* [`GET /users`](/api/get-users), [`GET /users/{user_id}`](/api/get-user),
[`GET /users/{email}`](/api/get-user-by-email) and
[`GET /users/me`](/api/get-own-user): Added is `user_billing_admin` field to
returned user objects.
* [`GET /events`](/api/get-events): Added `is_billing_admin` field to
user objects sent in `realm_user` events.
* [`POST /register`](/api/register-queue): Added `is_billing_admin` field
in the user objects returned in the `realm_users` field.
**Feature level 72**
* [`POST /register`](/api/register-queue): Renamed `max_icon_file_size` to
`max_icon_file_size_mib`, `realm_upload_quota` to `realm_upload_quota_mib`
and `max_logo_file_size` to `max_logo_file_size_mib`.
**Feature level 71**
* [`GET /events`](/api/get-events): Added `is_web_public` field to
`stream` events changing `invite_only`.
**Feature level 70**
* [`POST /register`](/api/register-queue): Added new top-level
`server_timestamp` field when fetching presence data, to match the
existing presence API.
Feature levels 66-69 are reserved for future use in 4.x maintenance
releases.
## Changes in Zulip 4.0
**Feature level 65**
No changes; feature level used for Zulip 4.0 release.
**Feature level 64**
* `PATCH /streams/{stream_id}`: Removed unnecessary JSON-encoding of string
parameters `new_name` and `description`.
* `PATCH /settings/display`: Removed unnecessary JSON-encoding of string
parameters `default_view`, `emojiset` and `timezone`.
**Feature level 63**
* `PATCH /settings/notifications`: Removed unnecessary JSON-encoding of string
parameter `notification_sound`.
* `PATCH /settings/display`: Removed unnecessary JSON-encoding of string
parameter `default_language`.
* `POST /users/me/tutorial_status`: Removed unnecessary JSON-encoding of string
parameter `status`.
* `POST /realm/domains`: Removed unnecessary JSON-encoding of string
parameter `domain`.
* `PATCH /default_stream_groups/{user_id}`: Removed unnecessary JSON-encoding of string
parameters `new_group_name` and `new_description`.
* `POST /users/me/hotspots`: Removed unnecessary JSON-encoding of string
parameter `hotspot`.
**Feature level 62**
* Added `moderators only` option for `wildcard_mention_policy`.
**Feature level 61**
* Added support for inviting users as moderators to the invitation
endpoints.
**Feature level 60**
* [`POST /register`](/api/register-queue): Added a new boolean field
`is_moderator`, similar to the existing `is_admin`, `is_owner` and
`is_guest` fields, to the response.
* [`PATCH /users/{user_id}`](/api/update-user): Added support for
changing a user's organization-level role to moderator.
* API endpoints that return `role` values can now return `300`, the
encoding of the moderator role.
**Feature level 59**
* [`GET /users`](/api/get-users), [`GET /users/{user_id}`](/api/get-user),
[`GET /users/{email}`](/api/get-user-by-email) and
[`GET /users/me`](/api/get-own-user): Added `role` field to returned
user objects.
* [`GET /events`](/api/get-events): Added `role` field to
user objects sent in `realm_user` events.
* [`POST /register`](/api/register-queue): Added `role` field
in the user objects returned in the `realm_users` field.
* [`GET /events`](/api/get-events): Added new `zulip_version` and
`zulip_feature_level` fields to the `restart` event.
**Feature level 58**
* [`POST /register`](/api/register-queue): Added the new
`stream_typing_notifications` property to supported
`client_capabilities`.
* [`GET /events`](/api/get-events): Extended format for `typing`
events to support typing notifications in stream messages. These new
events are only sent to clients with `client_capabilities`
showing support for `stream_typing_notifications`.
* [`POST /set-typing-status`](/api/set-typing-status): Added support
for sending typing notifications for stream messages.
**Feature level 57**
* [`PATCH /realm/filters/{filter_id}`](/api/update-linkifier): New
endpoint added to update a realm linkifier.
**Feature level 56**
* [`POST /register`](/api/register-queue): Added a new setting
`move_messages_between_streams_policy` for controlling who can
move messages between streams.
**Feature level 55**
* [`POST /register`](/api/register-queue): Added `realm_giphy_rating`
and `giphy_rating_options` fields.
* `PATCH /realm`: Added `giphy_rating` parameter.
**Feature level 54**
* `GET /realm/filters` has been removed and replace with [`GET
/realm/linkifiers`](/api/get-linkifiers) which returns the data in a
cleaner dictionary format.
* [`GET /events`](/api/get-events): Introduced new event type
`realm_linkifiers`. The previous `realm_filters` event type is
still supported for backwards compatibility, but will be removed in
a future release.
* [`POST /register`](/api/register-queue): The response now supports a
`realm_linkifiers` event type, containing the same data as the
legacy `realm_filters` key, with a more extensible object
format. The previous `realm_filters` event type is still supported
for backwards compatibility, but will be removed in a future
release. The legacy `realm_filters` key is deprecated but remains
available for backwards compatibility.
**Feature level 53**
* [`POST /register`](/api/register-queue): Added `max_topic_length`
and `max_message_length`, and renamed `max_stream_name_length` and
`max_stream_description_length` to allow clients to transparently
support these values changing in a future server version.
**Feature level 52**
* `PATCH /realm`: Removed unnecessary JSON-encoding of string
parameters `name`, `description`, `default_language`, and
`default_code_block_language`.
**Feature level 51**
* [`POST /register`](/api/register-queue): Added a new boolean field
`can_invite_others_to_realm`.
**Feature level 50**
* [`POST /register`](/api/register-queue): Replaced `invite_by_admins_only`
field with an integer field `invite_to_realm_policy`.
**Feature level 49**
* Added new [`POST /realm/playground`](/api/add-code-playground) and
[`DELETE /realm/playground/{playground_id}`](/api/remove-code-playground)
endpoints for code playgrounds.
* [`GET /events`](/api/get-events): A new `realm_playgrounds` events
is sent when changes are made to a set of configured code playgrounds for
an organization.
* [`POST /register`](/api/register-queue): Added a new `realm_playgrounds`
field, which is required to fetch the set of configured code playgrounds for
an organization.
**Feature level 48**
* [`POST /users/me/muted_users/{muted_user_id}`](/api/mute-user),
[`DELETE /users/me/muted_users/{muted_user_id}`](/api/unmute-user):
New endpoints added to mute/unmute users.
* [`GET /events`](/api/get-events): Added new event type `muted_users`
which will be sent to a user when the set of users muted by them has
changed.
**Feature level 47**
* [`POST /register`](/api/register-queue): Added a new `giphy_api_key`
field, which is required to fetch GIFs using the GIPHY API.
**Feature level 46**
* [`GET /messages`](/api/get-messages) and [`GET
/events`](/api/get-events): The `topic_links` field now contains a
list of dictionaries, rather than a list of strings.
**Feature level 45**
* [`GET /events`](/api/get-events): Removed useless `op` field from
`custom_profile_fields` events. These events contain the full set
of configured `custom_profile_fields` for the organization
regardless of what triggered the change.
**Feature level 44**
* [`POST /register`](/api/register-queue): extended the `unread_msgs`
object to include `old_unreads_missing`, which indicates whether the
server truncated the `unread_msgs` due to excessive total unread
messages.
**Feature level 43**
* [`GET /users/{user_id_or_email}/presence`]: Added support for
passing the `user_id` to identify the target user.
**Feature level 42**
* `PATCH /settings/display`: Added a new `default_view` setting allowing
the user to [set the default view](/help/configure-default-view).
**Feature level 41**
* [`GET /events`](/api/get-events): Removed `name` field from update
subscription events.
**Feature level 40**
* [`GET /events`](/api/get-events): Removed `email` field from update
subscription events.
**Feature level 39**
* Added new [GET /users/{email}](/api/get-user-by-email) endpoint.
**Feature level 38**
* [`POST /register`](/api/register-queue): Increased
`realm_community_topic_editing_limit_seconds` time limit value
to 259200s (3 days).
**Feature level 37**
* Consistently provide `subscribers` in stream data when
clients register for subscriptions with `include_subscribers`,
even if the user can't access subscribers.
**Feature level 36**
* [`POST /users`](/api/create-user): Restricted access to organization
administrators with the `can_create_users` permission.
* [Error handling](/api/rest-error-handling): The `code` property will
now be present in errors due to rate limits.
**Feature level 35**
* The peer_add and peer_remove subscription events now have plural
versions of `user_ids` and `stream_ids`.
**Feature level 34**
* [`POST /register`](/api/register-queue): Added a new `wildcard_mention_policy`
setting for controlling who can use wildcard mentions in large streams.
**Feature level 33**
* Markdown code blocks now have a `data-code-language` attribute
attached to the outer `div` element, recording the programming
language that was selecting for syntax highlighting. This field
supports the upcoming "view in playground" feature for code blocks.
**Feature level 32**
* [`GET /events`](/api/get-events): Added `op` field to
`update_message_flags` events, deprecating the `operation` field
(which has the same value). This removes an unintentional anomaly
in the format of this event type.
**Feature level 31**
* [`GET users/me/subscriptions`](/api/get-subscriptions): Added a
`role` field to Subscription objects representing whether the user
is a stream administrator.
* [`GET /events`](/api/get-events): Added `role` field to
Subscription objects sent in `subscriptions` events.
Note that as of this feature level, stream administrators are a
partially completed feature. In particular, it is impossible for a
user to be a stream administrator at this feature level.
**Feature level 30**
* [`GET users/me/subscriptions`](/api/get-subscriptions), [`GET
/streams`](/api/get-streams): Added `date_created` to Stream
objects.
* [`POST /users`](/api/create-user), `POST /bots`: The ID of the newly
created user is now returned in the response.
Feature levels 28 and 29 are reserved for future use in 3.x bug fix
releases.
## Changes in Zulip 3.1
**Feature level 27**
* The `short_name` field is removed from `display_recipients`
in `POST /users`.
**Feature level 26**
* The `sender_short_name` field is no longer included in
`GET /messages`.
* The `short_name` field is removed from `display_recipients`
in `GET /messages`.
## Changes in Zulip 3.0
**Feature level 25**
No changes; feature level used for Zulip 3.0 release.
**Feature level 24**
* The `!avatar()` and `!gravatar()` Markdown syntax, which was never
documented, had inconsistent syntax, and was rarely used, was
removed.
**Feature level 23**
* `GET/PUT/POST /users/me/pointer`: Removed. Zulip 3.0 removes the
`pointer` concept from Zulip; this legacy data structure was
replaced by tracking unread messages and loading views centered on
the first unread message.
**Feature level 22**
* [`GET /attachments`](/api/get-attachments): The date when a message
using the attachment was sent is now correctly encoded as
`date_sent`, replacing the confusingly named `name` field. The
`date_sent` and `create_time` fields of attachment objects are now
encoded as integers; (previously the implementation could send
floats incorrectly suggesting that microsecond precision is
relevant).
* `GET /invites`: Now encodes the user ID of the person who created
the invitation as `invited_by_user_id`, replacing the previous
`ref` field (which had that user's Zulip display email address).
* [`POST /register`](/api/register-queue): The encoding of an
unlimited `realm_message_retention_days` in the response was changed
from `null` to `-1`.
**Feature level 21**
* `PATCH /settings/display`: Replaced the `night_mode` boolean with
`color_scheme` as part of supporting automatic night theme detection.
**Feature level 20**
* Added support for inviting users as organization owners to the
invitation endpoints.
**Feature level 19**
* [`GET /events`](/api/get-events): `subscriptions` event with
`op="peer_add"` and `op="peer_remove"` now identify the modified
stream by a `stream_id` field, replacing the old `name` field.
**Feature level 18**
* [`POST /register`](/api/register-queue): Added
`user_avatar_url_field_optional` to supported `client_capabilities`.
**Feature level 17**
* [`GET users/me/subscriptions`](/api/get-subscriptions),
[`GET /streams`](/api/get-streams): Added
`message_retention_days` to Stream objects.
* [`POST users/me/subscriptions`](/api/subscribe), [`PATCH
streams/{stream_id}`](/api/update-stream): Added `message_retention_days`
parameter.
**Feature level 16**
* [`GET /users/me`]: Removed `pointer` from the response, as the
"pointer" concept is being removed in Zulip.
* Changed the rendered HTML markup for mentioning a time to use the
`<time>` HTML tag. It is OK for clients to ignore the previous time
mention markup, as the feature was not advertised before this change.
**Feature level 15**
* Added [spoilers](/help/format-your-message-using-markdown#spoilers)
to supported Markdown features.
**Feature level 14**
* [`GET users/me/subscriptions`](/api/get-subscriptions): Removed
the `is_old_stream` field from Stream objects. This field was
always equivalent to `stream_weekly_traffic != null` on the same object.
**Feature level 13**
* [`POST /register`](/api/register-queue): Added
`bulk_message_deletion` to supported `client_capabilities`.
* [`GET /events`](/api/get-events): `message_deleted`
events have new behavior. The `sender` and `sender_id` fields were
removed, and the `message_id` field was replaced by a `message_ids`
list for clients with the `bulk_message_deletion` client capability.
All clients should upgrade; we expect `bulk_message_deletion` to be
required in the future.
**Feature level 12**
* [`GET users/{user_id}/subscriptions/{stream_id}`](/api/get-subscription-status):
New endpoint added for checking if another user is subscribed to a stream.
**Feature level 11**
* [`POST /register`](/api/register-queue): Added
`realm_community_topic_editing_limit_seconds` to the response, the
time limit before community topic editing is forbidden. A `null`
value means no limit. This was previously hard-coded in the server
as 86400 seconds (1 day).
* [`POST /register`](/api/register-queue): The response now contains a
`is_owner`, similar to the existing `is_admin` and `is_guest` fields.
* [`POST /set-typing-status`](/api/set-typing-status): Removed legacy support for sending email
addresses, rather than user IDs, to encode private message recipients.
**Feature level 10**
* [`GET users/me`](/api/get-own-user): Added `avatar_version`, `is_guest`,
`is_active`, `timezone`, and `date_joined` fields to the User objects.
* [`GET users/me`](/api/get-own-user): Removed `client_id` and `short_name`
from the response to this endpoint. These fields had no purpose and
were inconsistent with other API responses describing users.
**Feature level 9**
* [`POST users/me/subscriptions`](/api/subscribe), [`DELETE
/users/me/subscriptions`](/api/unsubscribe): Other users to
subscribe/unsubscribe, declared in the `principals` parameter, can
now be referenced by user_id, rather than Zulip display email
address.
* [PATCH /messages/{message_id}](/api/update-message): Added
`send_notification_to_old_thread` and
`send_notification_to_new_thread` optional parameters.
**Feature level 8**
* [`GET /users`](/api/get-users), [`GET /users/{user_id}`](/api/get-user)
and [`GET /users/me`](/api/get-own-user): User objects now contain the
`is_owner` field as well.
* Added [time mentions](/help/format-your-message-using-markdown#mention-a-time)
to supported Markdown features.
**Feature level 7**
* [`GET /events`](/api/get-events): `realm_user` and
`realm_bot` events no longer contain an `email` field to identify
the user; use the `user_id` field instead. Previously, some (but
not all) events of these types contained an `email` key in addition to
to `user_id`) for identifying the modified user.
* [`PATCH /users/{user_id}`](/api/update-user): The `is_admin` and
`is_guest` parameters were removed in favor of the more general
`role` parameter for specifying a change in user role.
* [`GET /events`](/api/get-events): `realm_user` events
sent when a user's role changes now include `role` property, instead
of the previous `is_guest` or `is_admin` booleans.
* `GET /realm/emoji`: The user who uploaded a given custom emoji is
now indicated by an `author_id` field, replacing a previous `author`
object with unnecessary additional data.
**Feature level 6**
* [`GET /events`](/api/get-events): `realm_user` events to
update a user's avatar now include the `avatar_version` field, which
is important for correctly refetching medium-size avatar images when
the user's avatar changes.
* [`GET /users`](/api/get-users) and [`GET
/users/{user_id}`](/api/get-user): User objects now contain the
`avatar_version` field as well.
**Feature level 5**
* [`GET /events`](/api/get-events): `realm_bot` events,
sent when changes are made to bot users, now contain an
integer-format `owner_id` field, replacing the `owner` field (which
was an email address).
**Feature level 4**
* `jitsi_server_url`, `development_environment`, `server_generation`,
`password_min_length`, `password_min_guesses`, `max_file_upload_size_mib`,
`max_avatar_file_size_mib`, `server_inline_image_preview`,
`server_inline_url_embed_preview`, `server_avatar_changes_disabled` and
`server_name_changes_disabled` fields are now available via
`POST /register` to make them accessible to all the clients;
they were only internally available to Zulip's web app prior to this.
**Feature level 3**:
* `zulip_version` and `zulip_feature_level` are always returned
in `POST /register`; previously they were only returned if `event_types`
included `zulip_version`.
* Added new `presence_enabled` user notification setting; previously
[presence](/help/status-and-availability) was always enabled.
**Feature level 2**:
* [`POST /messages/{message_id}/reactions`](/api/add-reaction):
The `reaction_type` parameter is optional; the server will guess the
`reaction_type` if it is not specified (checking custom emoji, then
Unicode emoji for any with the provided name).
* `reactions` objects returned by the API (both in `GET /messages` and
in `GET /events`) now include the user who reacted in a top-level
`user_id` field. The legacy `user` dictionary (which had
inconsistent format between those two endpoints) is deprecated.
**Feature level 1**:
* [`GET /server_settings`](/api/get-server-settings): Added
`zulip_feature_level`, which can be used by clients to detect which
of the features described in this changelog are supported.
* [`POST /register`](/api/register-queue): Added `zulip_feature_level`
to the response if `zulip_version` is among the requested
`event_types`.
* [`GET /users`](/api/get-users): User objects for bots now
contain a `bot_owner_id`, replacing the previous `bot_owner` field
(which had the email address of the bot owner).
* [`GET /users/{user_id}`](/api/get-user): Endpoint added.
* [`GET /messages`](/api/get-messages): Add support for string-format
values for the `anchor` parameter, deprecating and replacing the
`use_first_unread_anchor` parameter.
* [`GET /messages`](/api/get-messages) and [`GET
/events`](/api/get-events): Message objects now use
`topic_links` rather than `subject_links` to indicate links either
present in the topic or generated by linkifiers applied to the topic.
* [`POST /users/me/subscriptions`](/api/subscribe): Replaced
`is_announcement_only` boolean with `stream_post_policy` enum for
specifying who can post to a stream.
* [`PATCH /streams/{stream_id}`](/api/update-stream): Replaced
`is_announcement_only` boolean with `stream_post_policy` enum for
specifying who can post to a stream.
* [`GET /streams`](/api/get-streams): Replaced
`is_announcement_only` boolean with `stream_post_policy` enum for
specifying who can post to a stream.
* `GET /api/v1/user_uploads`: Added new endpoint for requesting a
temporary URL for an uploaded file that does not require
authentication to access (e.g. for passing from a Zulip desktop,
mobile, or terminal app to the user's default browser).
* Added `EMAIL_ADDRESS_VISIBILITY_NOBODY` possible value for
`email_address_visibility`.
* Added `private_message_policy` realm setting.
* `muted_topic` objects now are a 3-item tuple: (`stream_id`, `topic`,
`date_muted`). Previously, they were a 2-item tuple.
* `GitLab` authentication is now available.
* Added `None` as a video call provider option.
## Changes in Zulip 2.1
* [`GET /users`](/api/get-users): Added `include_custom_profile_fields`
to request custom profile field data.
* [`GET /users/me`](/api/get-own-user): Added `avatar_url` field,
containing the user's avatar URL, to the response.
* [`GET /users/me/subscriptions`](/api/get-subscriptions): Added
`include_subscribers` parameter controlling whether data on the
other subscribers is included. Previous behavior was to always send
subscriber data.
* [`GET /users/me/subscriptions`](/api/get-subscriptions):
Stream-level notification settings like `push_notifications` were
changed to be nullable boolean fields (true/false/null), with `null`
meaning that the stream inherits the organization-level default.
Previously, the only values were true/false. A client communicates
support for this feature using `client_capabilities`.
* [`GET /users/me/subscriptions`](/api/get-subscriptions): Added
`wildcard_mentions_notify` notification setting, with the same
global-plus-stream-level-override model as other notification settings.
* [`GET /server_settings`](/api/get-server-settings): Added
`external_authentication_methods` structure, used to display login
buttons nicely in the mobile apps.
* Added `first_message_id` field to Stream objects. This is helpful
for determining whether the stream has any messages older than a
window cached in a client.
* Added `is_web_public` field to Stream objects. This field is
intended to support web-public streams.
* Added `/export/realm` endpoints for triggering a data export.
* `PATCH /realm`: Added `invite_to_stream_policy`,
`create_stream_policy`, `digest_emails_enabled`, `digest_weekday`,
`user_group_edit_policy`, and `avatar_changes_disabled` organization settings.
* Added `fluid_layout_width`, `desktop_icon_count_display`, and
`demote_inactive_streams` display settings.
* `enable_stream_sounds` was renamed to
`enable_stream_audible_notifications`.
* Deprecated `in_home_view`, replacing it with the more readable
`is_muted` (with the opposite meaning).
* Custom profile fields: Added `EXTERNAL_ACCOUNT` field type.
## Changes in Zulip 2.0
* [`POST /messages`](/api/send-message): Added support for using user
IDs and stream IDs for specifying the recipients of a message.
* [`POST /messages`](/api/send-message), [`POST
/messages/{message_id}`](/api/update-message): Added support for
encoding topics using the `topic` parameter name. The previous
`subject` parameter name was deprecated but is still supported for
backwards-compatibility.
* [`POST /set-typing-status`](/api/set-typing-status): Added support for specifying the
recipients with user IDs, deprecating the original API of specifying
them using email addresses.
------------------
## Changes not yet stabilized
* [`POST /register`](/api/register-queue): Added `slim_presence`
parameter. Changes the format of presence events, but is still
being changed and should not be used by clients.
[server-changelog]: https://zulip.readthedocs.io/en/latest/overview/changelog.html
[release-lifecycle]: https://zulip.readthedocs.io/en/latest/overview/release-lifecycle.html