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---
type: module
---
### Client Config
Clients can store custom config data for their account on their
homeserver. This account data will be synced between different devices
and can persist across installations on a particular device. Users may
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only view the account data for their own account.
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The account data may be either global or scoped to a particular room.
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There is no inheritance mechanism here: a given `type` of data missing from a room's account data does not fall back to the global account data with the same `type` .
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#### Events
The client receives the account data as events in the `account_data`
sections of a `/sync` .
These events can also be received in a `/events` response or in the
`account_data` section of a room in `/sync` . `m.tag` events appearing in
`/events` will have a `room_id` with the room the tags are for.
#### Client Behaviour
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{{% http-api spec="client-server" api="account-data" %}}
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#### Server Behaviour
Servers MUST reject clients from setting account data for event types
that the server manages. Currently, this only includes
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[m.fully\_read ](#mfully_read ).
