# Implementation Process (r0.5.0)

- [ ] 2   API Standards
    - [x] ~~2.1   GET /_matrix/client/versions~~
- [x] ~~3   Web Browser Clients~~ *Not applicable*
- [ ] 4   Server Discovery
    - [ ] 4.1   Well-known URI
        - [x] ~~4.1.1   GET /.well-known/matrix/client~~
- [ ] 5   Client Authentication
    - [x] ~~5.1   Using access tokens~~ *Only through Authorization header*
    - [ ] 5.2   Relationship between access tokens and devices
    - [ ] 5.3   User-Interactive Authentication API
        - [ ] 5.3.1   Overview
        - [ ] 5.3.2   User-interactive API in the REST API
        - [ ] 5.3.3   Example
        - [ ] 5.3.4   Authentication types
            - [ ] 5.3.4.1   Password-based
            - [ ] 5.3.4.2   Google ReCaptcha
            - [ ] 5.3.4.3   Token-based
            - [ ] 5.3.4.4   OAuth2-based
            - [ ] 5.3.4.5   Email-based (identity / homeserver)
            - [ ] 5.3.4.6   Phone number/MSISDN-based (identity / homeserver)
            - [ ] 5.3.4.7   Dummy Auth
        - [ ] 5.3.5   Fallback
            - [ ] 5.3.5.1   Example
        - [ ] 5.3.6   Identifier types
            - [ ] 5.3.6.1   Matrix User ID
            - [ ] 5.3.6.2   Third-party ID
            - [ ] 5.3.6.3   Phone number
    - [ ] 5.4   Login
        - [ ] 5.4.1   GET /_matrix/client/r0/login
        - [ ] 5.4.2   POST /_matrix/client/r0/login
        - [ ] 5.4.3   POST /_matrix/client/r0/logout
        - [ ] 5.4.4   POST /_matrix/client/r0/logout/all
        - [ ] 5.4.5   Login Fallback
    - [ ] 5.5   Account registration and management
        - [ ] 5.5.1   POST /_matrix/client/r0/register
        - [ ] 5.5.2   POST /_matrix/client/r0/register/email/requestToken
        - [ ] 5.5.3   POST /_matrix/client/r0/register/msisdn/requestToken
        - [ ] 5.5.4   POST /_matrix/client/r0/account/password
        - [ ] 5.5.5   POST /_matrix/client/r0/account/password/email/requestToken
        - [ ] 5.5.6   POST /_matrix/client/r0/account/password/msisdn/requestToken
        - [ ] 5.5.7   POST /_matrix/client/r0/account/deactivate
        - [ ] 5.5.8   GET /_matrix/client/r0/register/available
        - [ ] 5.5.9   Notes on password management
    - [ ] 5.6   Adding Account Administrative Contact Information
        - [ ] 5.6.1   GET /_matrix/client/r0/account/3pid
        - [ ] 5.6.2   POST /_matrix/client/r0/account/3pid
        - [ ] 5.6.3   POST /_matrix/client/r0/account/3pid/delete
        - [ ] 5.6.4   POST /_matrix/client/r0/account/3pid/email/requestToken
        - [ ] 5.6.5   POST /_matrix/client/r0/account/3pid/msisdn/requestToken
    - [ ] 5.7   Current account information
        - [ ] 5.7.1   GET /_matrix/client/r0/account/whoami
- [ ] 6   Capabilities negotiation
    - [ ] 6.1   GET /_matrix/client/r0/capabilities
    - [ ] 6.2   m.change_password capability
    - [ ] 6.3   m.room_versions capability
- [ ] 7   Pagination
- [ ] 8   Filtering
    - [ ] 8.1   Lazy-loading room members
    - [ ] 8.2   API endpoints
        - [ ] 8.2.1   POST /_matrix/client/r0/user/{userId}/filter
        - [ ] 8.2.2   GET /_matrix/client/r0/user/{userId}/filter/{filterId}
- [ ] 9   Events
    - [ ] 9.1   Types of room events
        - [ ] 9.1.1   Event Fields
        - [ ] 9.1.2   Room Event Fields
        - [ ] 9.1.3   State Event Fields
    - [ ] 9.2   Size limits
    - [ ] 9.3   Room Events
        - [ ] 9.3.1   m.room.aliases
        - [ ] 9.3.2   m.room.canonical_alias
        - [ ] 9.3.3   m.room.create
        - [ ] 9.3.4   m.room.join_rules
        - [ ] 9.3.5   m.room.member
        - [ ] 9.3.6   m.room.power_levels
        - [ ] 9.3.7   m.room.redaction
    - [x] 9.4   Syncing
        - [x] 9.4.1   GET /_matrix/client/r0/sync
        - [x] ~~9.4.2   GET /_matrix/client/r0/events~~ *Deprecated*
        - [x] ~~9.4.3   GET /_matrix/client/r0/initialSync~~ *Deprecated*
        - [x] ~~9.4.4   GET /_matrix/client/r0/events/{eventId}~~ *Deprecated*
    - [ ] 9.5   Getting events for a room
        - [ ] 9.5.1   GET /_matrix/client/r0/rooms/{roomId}/event/{eventId}
        - [ ] 9.5.2   GET /_matrix/client/r0/rooms/{roomId}/state/{eventType}/{stateKey}
        - [ ] 9.5.3   GET /_matrix/client/r0/rooms/{roomId}/state
        - [ ] 9.5.4   GET /_matrix/client/r0/rooms/{roomId}/members
        - [ ] 9.5.5   GET /_matrix/client/r0/rooms/{roomId}/joined_members
        - [ ] 9.5.6   GET /_matrix/client/r0/rooms/{roomId}/messages
        - [ ] 9.5.7   GET /_matrix/client/r0/rooms/{roomId}/initialSync
    - [ ] 9.6   Sending events to a room
        - [ ] 9.6.1   PUT /_matrix/client/r0/rooms/{roomId}/state/{eventType}/{stateKey}
        - [ ] 9.6.2   PUT /_matrix/client/r0/rooms/{roomId}/send/{eventType}/{txnId}
    - [ ] 9.7   Redactions
        - [ ] 9.7.1   Events
            - [ ] 9.7.1.1   m.room.redaction
        - [ ] 9.7.2   Client behaviour
            - [ ] 9.7.2.1   PUT /_matrix/client/r0/rooms/{roomId}/redact/{eventId}/{txnId}
- [ ] 10   Rooms
    - [ ] 10.1   Creation
        - [ ] 10.1.1   POST /_matrix/client/r0/createRoom
    - [ ] 10.2   Room aliases
        - [ ] 10.2.1   PUT /_matrix/client/r0/directory/room/{roomAlias}
        - [ ] 10.2.2   GET /_matrix/client/r0/directory/room/{roomAlias}
        - [ ] 10.2.3   DELETE /_matrix/client/r0/directory/room/{roomAlias}
    - [ ] 10.3   Permissions
    - [ ] 10.4   Room membership
        - [ ] 10.4.1   GET /_matrix/client/r0/joined_rooms
        - [ ] 10.4.2   Joining rooms
            - [ ] 10.4.2.1   POST /_matrix/client/r0/rooms/{roomId}/invite
            - [ ] 10.4.2.2   POST /_matrix/client/r0/rooms/{roomId}/join
            - [ ] 10.4.2.3   POST /_matrix/client/r0/join/{roomIdOrAlias}
        - [ ] 10.4.3   Leaving rooms
            - [ ] 10.4.3.1   POST /_matrix/client/r0/rooms/{roomId}/leave
            - [ ] 10.4.3.2   POST /_matrix/client/r0/rooms/{roomId}/forget
            - [ ] 10.4.3.3   POST /_matrix/client/r0/rooms/{roomId}/kick
        - [ ] 10.4.4   Banning users in a room
            - [ ] 10.4.4.1   POST /_matrix/client/r0/rooms/{roomId}/ban
            - [ ] 10.4.4.2   POST /_matrix/client/r0/rooms/{roomId}/unban
    - [ ] 10.5   Listing rooms
        - [ ] 10.5.1   GET /_matrix/client/r0/directory/list/room/{roomId}
        - [ ] 10.5.2   PUT /_matrix/client/r0/directory/list/room/{roomId}
        - [ ] 10.5.3   GET /_matrix/client/r0/publicRooms
        - [ ] 10.5.4   POST /_matrix/client/r0/publicRooms
- [ ] 11   User Data
    - [ ] 11.1   User Directory
        - [ ] 11.1.1   POST /_matrix/client/r0/user_directory/search
    - [ ] 11.2   Profiles
        - [ ] 11.2.1   PUT /_matrix/client/r0/profile/{userId}/displayname
        - [ ] 11.2.2   GET /_matrix/client/r0/profile/{userId}/displayname
        - [ ] 11.2.3   PUT /_matrix/client/r0/profile/{userId}/avatar_url
        - [ ] 11.2.4   GET /_matrix/client/r0/profile/{userId}/avatar_url
        - [ ] 11.2.5   GET /_matrix/client/r0/profile/{userId}
        - [ ] 11.2.6   Events on Change of Profile Information
- [ ] 12   Security
    - [ ] 12.1   Rate limiting
- [ ] 13   Modules
    - [ ] 13.1   Feature Profiles
        - [ ] 13.1.1   Summary
        - [ ] 13.1.2   Clients
            - [ ] 13.1.2.1   Stand-alone web (Web)
            - [ ] 13.1.2.2   Mobile (Mobile)
            - [ ] 13.1.2.3   Desktop (Desktop)
            - [ ] 13.1.2.4   Command Line Interface (CLI)
            - [ ] 13.1.2.5   Embedded (Embedded)
                - [ ] 13.1.2.5.1   Application
                - [ ] 13.1.2.5.2   Device
    - [ ] 13.2   Instant Messaging
        - [ ] 13.2.1   Events
            - [ ] 13.2.1.1   m.room.message
            - [ ] 13.2.1.2   m.room.message.feedback
            - [ ] 13.2.1.3   m.room.name
            - [ ] 13.2.1.4   m.room.topic
            - [ ] 13.2.1.5   m.room.avatar
            - [ ] 13.2.1.6   m.room.pinned_events
            - [ ] 13.2.1.7   m.room.message msgtypes
                - [ ] 13.2.1.7.1   m.text
                - [ ] 13.2.1.7.2   m.emote
                - [ ] 13.2.1.7.3   m.notice
                - [ ] 13.2.1.7.4   m.image
                - [ ] 13.2.1.7.5   m.file
                - [ ] 13.2.1.7.6   m.audio
                - [ ] 13.2.1.7.7   m.location
                - [ ] 13.2.1.7.8   m.video
        - [ ] 13.2.2   Client behaviour
            - [ ] 13.2.2.1   Recommendations when sending messages
            - [ ] 13.2.2.2   Local echo
            - [ ] 13.2.2.3   Calculating the display name for a user
            - [ ] 13.2.2.4   Displaying membership information with messages
            - [ ] 13.2.2.5   Calculating the display name for a room
            - [ ] 13.2.2.6   Forming relationships between events
                - [ ] 13.2.2.6.1   Rich replies
                    - [ ] 13.2.2.6.1.1   Fallbacks and event representation
                        - [ ] 13.2.2.6.1.1.1   Stripping the fallback
                        - [ ] 13.2.2.6.1.1.2   Fallback for m.text, m.notice, and unrecognised message types
                        - [ ] 13.2.2.6.1.1.3   Fallback for m.emote
                        - [ ] 13.2.2.6.1.1.4   Fallback for m.image, m.video, m.audio, and m.file
        - [ ] 13.2.3   ~~Server behaviour~~ *Not applicable*
        - [ ] 13.2.4   Security considerations
    - [ ] 13.3   Voice over IP
        - [ ] 13.3.1   Events
            - [ ] 13.3.1.1   m.call.invite
            - [ ] 13.3.1.2   m.call.candidates
            - [ ] 13.3.1.3   m.call.answer
            - [ ] 13.3.1.4   m.call.hangup
        - [ ] 13.3.2   Client behaviour
            - [ ] 13.3.2.1   Glare
        - [ ] 13.3.3   ~~Server behaviour~~ *Not applicable*
            - [ ] 13.3.3.1   GET /_matrix/client/r0/voip/turnServer
        - [ ] 13.3.4   Security considerations
    - [ ] 13.4   Typing Notifications
        - [ ] 13.4.1   Events
            - [ ] 13.4.1.1   m.typing
        - [ ] 13.4.2   Client behaviour
            - [ ] 13.4.2.1   PUT /_matrix/client/r0/rooms/{roomId}/typing/{userId}
        - [ ] 13.4.3   Security considerations
    - [ ] 13.5   Receipts
        - [ ] 13.5.1   Events
            - [ ] 13.5.1.1   m.receipt
        - [ ] 13.5.2   Client behaviour
            - [ ] 13.5.2.1   POST /_matrix/client/r0/rooms/{roomId}/receipt/{receiptType}/{eventId}
        - [ ] 13.5.3   ~~Server behaviour~~ *Not applicable*
        - [ ] 13.5.4   Security considerations
    - [ ] 13.6   Fully read markers
        - [ ] 13.6.1   Events
            - [ ] 13.6.1.1   m.fully_read
        - [ ] 13.6.2   Client behaviour
            - [ ] 13.6.2.1   POST /_matrix/client/r0/rooms/{roomId}/read_markers
        - [ ] 13.6.3   ~~Server behaviour~~ *Not applicable*
    - [ ] 13.7   Presence
        - [ ] 13.7.1   Events
            - [ ] 13.7.1.1   m.presence
        - [ ] 13.7.2   Client behaviour
            - [ ] 13.7.2.1   PUT /_matrix/client/r0/presence/{userId}/status
            - [ ] 13.7.2.2   GET /_matrix/client/r0/presence/{userId}/status
            - [ ] 13.7.2.3   Last active ago
            - [ ] 13.7.2.4   Idle timeout
        - [ ] 13.7.3   Security considerations
    - [ ] 13.8   Content repository
        - [ ] 13.8.1   Matrix Content (MXC) URIs
        - [ ] 13.8.2   Client behaviour
            - [ ] 13.8.2.1   POST /_matrix/media/r0/upload
            - [ ] 13.8.2.2   GET /_matrix/media/r0/download/{serverName}/{mediaId}
            - [ ] 13.8.2.3   GET /_matrix/media/r0/download/{serverName}/{mediaId}/{fileName}
            - [ ] 13.8.2.4   GET /_matrix/media/r0/thumbnail/{serverName}/{mediaId}
            - [ ] 13.8.2.5   GET /_matrix/media/r0/preview_url
            - [ ] 13.8.2.6   GET /_matrix/media/r0/config
            - [ ] 13.8.2.7   Thumbnails
        - [ ] 13.8.3   Security considerations
    - [ ] 13.9   Send-to-Device messaging
        - [ ] 13.9.1   Client behaviour
        - [ ] 13.9.2   ~~Server behaviour~~ *Not applicable*
        - [ ] 13.9.3   Protocol definitions
            - [ ] 13.9.3.1   PUT /_matrix/client/r0/sendToDevice/{eventType}/{txnId}
            - [ ] 13.9.3.2   Extensions to /sync
    - [ ] 13.10   Device Management
        - [ ] 13.10.1   Client behaviour
            - [ ] 13.10.1.1   GET /_matrix/client/r0/devices
            - [ ] 13.10.1.2   GET /_matrix/client/r0/devices/{deviceId}
            - [ ] 13.10.1.3   PUT /_matrix/client/r0/devices/{deviceId}
            - [ ] 13.10.1.4   DELETE /_matrix/client/r0/devices/{deviceId}
            - [ ] 13.10.1.5   POST /_matrix/client/r0/delete_devices
        - [ ] 13.10.2   Security considerations
    - [ ] 13.11   End-to-End Encryption
        - [ ] 13.11.1   Key Distribution
            - [ ] 13.11.1.1   Overview
            - [ ] 13.11.1.2   Key algorithms
            - [ ] 13.11.1.3   Device keys
            - [ ] 13.11.1.4   Uploading keys
            - [ ] 13.11.1.5   Tracking the device list for a user
            - [ ] 13.11.1.6   Sending encrypted attachments
                - [ ] 13.11.1.6.1   Extensions to m.message msgtypes
            - [ ] 13.11.1.7   Claiming one-time keys
        - [ ] 13.11.2   Device verification
            - [ ] 13.11.2.1   Key verification framework
                - [ ] 13.11.2.1.1   m.key.verification.request
                - [ ] 13.11.2.1.2   m.key.verification.start
                - [ ] 13.11.2.1.3   m.key.verification.cancel
            - [ ] 13.11.2.2   Short Authentication String (SAS) verification
                - [ ] 13.11.2.2.1   Error and exception handling
                - [ ] 13.11.2.2.2   Verification messages specific to SAS
                - [ ] 13.11.2.2.3   m.key.verification.start
                - [ ] 13.11.2.2.4   m.key.verification.accept
                - [ ] 13.11.2.2.5   m.key.verification.key
                - [ ] 13.11.2.2.6   m.key.verification.mac
                - [ ] 13.11.2.2.7   HKDF calculation
                - [ ] 13.11.2.2.8   SAS method: decimal
                - [ ] 13.11.2.2.9   SAS method: emoji
        - [ ] 13.11.3   Sharing keys between devices
            - [ ] 13.11.3.1   Key requests
            - [ ] 13.11.3.2   Key exports
                - [ ] 13.11.3.2.1   Key export format
        - [ ] 13.11.4   Messaging Algorithms
            - [ ] 13.11.4.1   Messaging Algorithm Names
            - [ ] 13.11.4.2   m.olm.v1.curve25519-aes-sha2
                - [ ] 13.11.4.2.1   Recovering from undecryptable messages
            - [ ] 13.11.4.3   m.megolm.v1.aes-sha2
        - [ ] 13.11.5   Protocol definitions
            - [ ] 13.11.5.1   Events
                - [ ] 13.11.5.1.1   m.room.encryption
                - [ ] 13.11.5.1.2   m.room.encrypted
                - [ ] 13.11.5.1.3   m.room_key
                - [ ] 13.11.5.1.4   m.room_key_request
                - [ ] 13.11.5.1.5   m.forwarded_room_key
                - [ ] 13.11.5.1.6   m.dummy
            - [ ] 13.11.5.2   Key management API
                - [ ] 13.11.5.2.1   POST /_matrix/client/r0/keys/upload
                - [ ] 13.11.5.2.2   POST /_matrix/client/r0/keys/query
                - [ ] 13.11.5.2.3   POST /_matrix/client/r0/keys/claim
                - [ ] 13.11.5.2.4   GET /_matrix/client/r0/keys/changes
            - [ ] 13.11.5.3   Extensions to /sync
    - [ ] 13.12   Room History Visibility
        - [ ] 13.12.1   Events
            - [ ] 13.12.1.1   m.room.history_visibility
        - [ ] 13.12.2   Client behaviour
        - [ ] 13.12.3   ~~Server behaviour~~ *Not applicable*
        - [ ] 13.12.4   Security considerations
    - [ ] 13.13   Push Notifications
        - [ ] 13.13.1   Client behaviour
            - [ ] 13.13.1.1   GET /_matrix/client/r0/pushers
            - [ ] 13.13.1.2   POST /_matrix/client/r0/pushers/set
            - [ ] 13.13.1.3   Listing Notifications
                - [ ] 13.13.1.3.1   GET /_matrix/client/r0/notifications
            - [ ] 13.13.1.4   Receiving notifications
            - [ ] 13.13.1.5   Push Rules
                - [ ] 13.13.1.5.1   Actions
                    - [ ] 13.13.1.5.1.1   Tweaks
                - [ ] 13.13.1.5.2   Predefined Rules
                    - [ ] 13.13.1.5.2.1   Default Override Rules
                        - [ ] 13.13.1.5.2.1.1   .m.rule.master
                        - [ ] 13.13.1.5.2.1.2   .m.rule.suppress_notices
                        - [ ] 13.13.1.5.2.1.3   .m.rule.invite_for_me
                        - [ ] 13.13.1.5.2.1.4   .m.rule.member_event
                        - [ ] 13.13.1.5.2.1.5   .m.rule.contains_display_name
                        - [ ] 13.13.1.5.2.1.6   .m.rule.tombstone
                        - [ ] 13.13.1.5.2.1.7   .m.rule.roomnotif
                    - [ ] 13.13.1.5.2.2   Default Content Rules
                        - [ ] 13.13.1.5.2.2.1   .m.rule.contains_user_name
                    - [ ] 13.13.1.5.2.3   Default Underride Rules
                        - [ ] 13.13.1.5.2.3.1   .m.rule.call
                        - [ ] 13.13.1.5.2.3.2   .m.rule.encrypted_room_one_to_one
                        - [ ] 13.13.1.5.2.3.3   .m.rule.room_one_to_one
                        - [ ] 13.13.1.5.2.3.4   .m.rule.message
                        - [ ] 13.13.1.5.2.3.5   .m.rule.encrypted
                - [ ] 13.13.1.5.3   Conditions
            - [ ] 13.13.1.6   Push Rules: API
                - [ ] 13.13.1.6.1   GET /_matrix/client/r0/pushrules/
                - [ ] 13.13.1.6.2   GET /_matrix/client/r0/pushrules/{scope}/{kind}/{ruleId}
                - [ ] 13.13.1.6.3   DELETE /_matrix/client/r0/pushrules/{scope}/{kind}/{ruleId}
                - [ ] 13.13.1.6.4   PUT /_matrix/client/r0/pushrules/{scope}/{kind}/{ruleId}
                - [ ] 13.13.1.6.5   GET /_matrix/client/r0/pushrules/{scope}/{kind}/{ruleId}/enabled
                - [ ] 13.13.1.6.6   PUT /_matrix/client/r0/pushrules/{scope}/{kind}/{ruleId}/enabled
                - [ ] 13.13.1.6.7   GET /_matrix/client/r0/pushrules/{scope}/{kind}/{ruleId}/actions
                - [ ] 13.13.1.6.8   PUT /_matrix/client/r0/pushrules/{scope}/{kind}/{ruleId}/actions
            - [ ] 13.13.1.7   Push Rules: Events
                - [ ] 13.13.1.7.1   m.push_rules
                - [ ] 13.13.1.7.2   Examples
        - [ ] 13.13.2   ~~Server behaviour~~ *Not applicable*
        - [ ] 13.13.3   Push Gateway behaviour
            - [ ] 13.13.3.1   Recommendations for APNS
        - [ ] 13.13.4   Security considerations
    - [ ] 13.14   Third party invites
        - [ ] 13.14.1   Events
            - [ ] 13.14.1.1   m.room.third_party_invite
        - [ ] 13.14.2   Client behaviour
            - [ ] 13.14.2.1   POST /_matrix/client/r0/rooms/{roomId}/invite
        - [ ] 13.14.3   ~~Server behaviour~~ *Not applicable*
        - [ ] 13.14.4   Security considerations
    - [ ] 13.15   Server Side Search
        - [ ] 13.15.1   Client behaviour
            - [ ] 13.15.1.1   POST /_matrix/client/r0/search
        - [ ] 13.15.2   Search Categories
            - [ ] 13.15.2.1   room_events
        - [ ] 13.15.3   Ordering
        - [ ] 13.15.4   Groups
        - [ ] 13.15.5   Pagination
        - [ ] 13.15.6   Security considerations
    - [ ] 13.16   Guest Access
        - [ ] 13.16.1   Events
            - [ ] 13.16.1.1   m.room.guest_access
        - [ ] 13.16.2   Client behaviour
        - [ ] 13.16.3   ~~Server behaviour~~ *Not applicable*
        - [ ] 13.16.4   Security considerations
    - [ ] 13.17   Room Previews
        - [ ] 13.17.1   Client behaviour
            - [ ] 13.17.1.1   GET /_matrix/client/r0/events
        - [ ] 13.17.2   ~~Server behaviour~~ *Not applicable*
        - [ ] 13.17.3   Security considerations
    - [ ] 13.18   Room Tagging
        - [ ] 13.18.1   Events
            - [ ] 13.18.1.1   m.tag
        - [ ] 13.18.2   Client Behaviour
            - [ ] 13.18.2.1   GET /_matrix/client/r0/user/{userId}/rooms/{roomId}/tags
            - [ ] 13.18.2.2   PUT /_matrix/client/r0/user/{userId}/rooms/{roomId}/tags/{tag}
            - [ ] 13.18.2.3   DELETE /_matrix/client/r0/user/{userId}/rooms/{roomId}/tags/{tag}
    - [ ] 13.19   Client Config
        - [ ] 13.19.1   Events
        - [ ] 13.19.2   Client Behaviour
            - [ ] 13.19.2.1   PUT /_matrix/client/r0/user/{userId}/account_data/{type}
            - [ ] 13.19.2.2   GET /_matrix/client/r0/user/{userId}/account_data/{type}
            - [ ] 13.19.2.3   PUT /_matrix/client/r0/user/{userId}/rooms/{roomId}/account_data/{type}
            - [ ] 13.19.2.4   GET /_matrix/client/r0/user/{userId}/rooms/{roomId}/account_data/{type}
        - [ ] 13.19.3   ~~Server behaviour~~ *Not applicable*
    - [ ] 13.20   Server Administration
        - [ ] 13.20.1   Client Behaviour
            - [ ] 13.20.1.1   GET /_matrix/client/r0/admin/whois/{userId}
    - [ ] 13.21   Event Context
        - [ ] 13.21.1   Client behaviour
            - [ ] 13.21.1.1   GET /_matrix/client/r0/rooms/{roomId}/context/{eventId}
        - [ ] 13.21.2   Security considerations
    - [ ] 13.22   SSO client login
        - [ ] 13.22.1   Client behaviour
            - [ ] 13.22.1.1   GET /_matrix/client/r0/login/sso/redirect
        - [ ] 13.22.2   ~~Server behaviour~~ *Not applicable*
            - [ ] 13.22.2.1   Handling the redirect endpoint
            - [ ] 13.22.2.2   Handling the authentication endpoint
    - [ ] 13.23   Direct Messaging
        - [ ] 13.23.1   Events
            - [ ] 13.23.1.1   m.direct
        - [ ] 13.23.2   Client behaviour
        - [ ] 13.23.3   ~~Server behaviour~~ *Not applicable*
    - [ ] 13.24   Ignoring Users
        - [ ] 13.24.1   Events
            - [ ] 13.24.1.1   m.ignored_user_list
        - [ ] 13.24.2   Client behaviour
        - [ ] 13.24.3   ~~Server behaviour~~ *Not applicable*
    - [ ] 13.25   Sticker Messages
        - [ ] 13.25.1   Events
            - [ ] 13.25.1.1   m.sticker
        - [ ] 13.25.2   Client behaviour
    - [ ] 13.26   Reporting Content
        - [ ] 13.26.1   Client behaviour
            - [ ] 13.26.1.1   POST /_matrix/client/r0/rooms/{roomId}/report/{eventId}
        - [ ] 13.26.2   ~~Server behaviour~~ *Not applicable*
    - [ ] 13.27   Third Party Networks
        - [ ] 13.27.1   Third Party Lookups
            - [ ] 13.27.1.1   GET /_matrix/client/r0/thirdparty/protocols
            - [ ] 13.27.1.2   GET /_matrix/client/r0/thirdparty/protocol/{protocol}
            - [ ] 13.27.1.3   GET /_matrix/client/r0/thirdparty/location/{protocol}
            - [ ] 13.27.1.4   GET /_matrix/client/r0/thirdparty/user/{protocol}
            - [ ] 13.27.1.5   GET /_matrix/client/r0/thirdparty/location
            - [ ] 13.27.1.6   GET /_matrix/client/r0/thirdparty/user
    - [ ] 13.28   OpenID
        - [ ] 13.28.1   POST /_matrix/client/r0/user/{userId}/openid/request_token
    - [ ] 13.29   Server Access Control Lists (ACLs) for rooms
        - [ ] 13.29.1   m.room.server_acl
        - [ ] 13.29.2   Client behaviour
        - [ ] 13.29.3   ~~Server behaviour~~ *Not applicable*
        - [ ] 13.29.4   Security considerations
    - [ ] 13.30   User, room, and group mentions
        - [ ] 13.30.1   Client behaviour
    - [ ] 13.31   Room Upgrades
        - [ ] 13.31.1   Events
            - [ ] 13.31.1.1   m.room.tombstone
        - [ ] 13.31.2   Client behaviour
            - [ ] 13.31.2.1   POST /_matrix/client/r0/rooms/{roomId}/upgrade
        - [x] ~~13.31.3   Server behaviour~~ *Not applicable*
    - [ ] 13.32   Server Notices
        - [ ] 13.32.1   Events
            - [ ] 13.32.1.1   m.room.message (m.server_notice)
        - [ ] 13.32.2   Client behaviour
        - [x] ~~13.32.3   Server behaviour~~ *Not applicable*