# MessagingService

Roblox Engine API class from Roblox Studio 0.744.0.7441077 (version-7aaa6838d36c4448).

- Inherits from, nearest first: [Instance](https://rapi.sleaze.dev/classes/Instance.md), [Object](https://rapi.sleaze.dev/classes/Object.md)
- Tags: Not creatable, Not replicated, Service
- Memory category: Instances
- HTML page: https://rapi.sleaze.dev/classes/MessagingService/
- Roblox documentation: https://create.roblox.com/docs/reference/engine/classes/MessagingService

Allows servers of the same experience to communicate with each other.

## Methods

### PublishAsync

```luau
MessagingService:PublishAsync(topic: string, message: any)
```

- Tags: Yields, Capabilities: ServerCommunication

Invokes the supplied callback whenever a message is pushed to the topic.

Parameters:

- `topic`: Determines where the message is sent.
- `message`: The data to include in the message.

### SubscribeAsync

```luau
MessagingService:SubscribeAsync(topic: string, callback: (...any) -> ...any): RBXScriptConnection
```

- Tags: Yields, Capabilities: ServerCommunication

Begins listening to the given topic.

Parameters:

- `topic`: Determines where to listen for messages.
- `callback`: Function to be invoked whenever a message is received.

Returns: Connection that can be used to unsubscribe from the topic.

## Inherited members

- From [Instance](https://rapi.sleaze.dev/classes/Instance.md): `Archivable`, `archivable`, `Attributes`, `AttributesReplicate`, `AttributesSerialize`, `HistoryId`, `Name`, `Parent`, `PredictionMode`, `PropertyStatusStudio`, `RobloxLocked`, `SerializedOverrides`, `SourceAssetId`, `Tags`, `UniqueId`, `numExpectedDirectChildren`, `DataCost`, `Capabilities`, `DefinesCapabilities`, `IsInSandbox`, `Sandboxed`, `AddTag`, `ClearAllChildren`, `Clone`, `Destroy`, `FindFirstAncestor`, `FindFirstAncestorOfClass`, `FindFirstAncestorWhichIsA`, `FindFirstChild`, `FindFirstChildOfClass`, `FindFirstChildWhichIsA`, `FindFirstDescendant`, `GetActor`, `GetAttribute`, `GetAttributeChangedSignal`, `GetAttributes`, `GetChildren`, `GetDebugId`, `GetDescendants`, `GetFullName`, `GetStyled`, `GetStyledPropertyChangedSignal`, `GetTags`, `HasTag`, `IsAncestorOf`, `IsDescendantOf`, `IsPropertyModified`, `QueryDescendants`, `RemoveTag`, `ResetPropertyToDefault`, `SetAttribute`, `WaitForChild`, `Remove`, `children`, `clone`, `destroy`, `findFirstChild`, `getChildren`, `isDescendantOf`, `remove`, `AncestryChanged`, `AttributeChanged`, `ChildAdded`, `ChildRemoved`, `DescendantAdded`, `DescendantRemoving`, `Destroying`, `StyledPropertiesChanged`, `childAdded`
- From [Object](https://rapi.sleaze.dev/classes/Object.md): `ClassName`, `className`, `GetPropertyChangedSignal`, `IsA`, `isA`, `Changed`