---
id: "T:cAlgo.API.MessageSubscription"
kind: "interface"
namespace: "cAlgo.API"
url: "https://help.ctrader.com/ctrader-algo/references/Messages/MessageSubscription/"
---

> Documentation index for agents: https://help.ctrader.com/ctrader-algo/llms.txt · machine index: https://help.ctrader.com/ctrader-algo/api.json

# MessageSubscription (interface)

Represents a message subscription.

Environments: Desktop supported · CLI supported · Cloud supported.

## Definition

```csharp
public interface MessageSubscription
```

Available since cAlgo.API 5.2.

## Examples

C#:

```csharp
var subscription = Messages.Subscribe<string>("Signals", args => Print("Received: {0}", args.Message));
Print("Subscription {0} listens to {1}", subscription.Id, subscription.Subject);
```

Python:

```python
# Not available in Python: subscriptions are created by the generic Messages.Subscribe method
```

## Methods

- `void Unsubscribe()` — Unsubscribes current subscription. [details](https://help.ctrader.com/ctrader-algo/references/Messages/MessageSubscription/Unsubscribe/index.md)

## Properties

- `string Id {get;}` — Gets subscription Id. [details](https://help.ctrader.com/ctrader-algo/references/Messages/MessageSubscription/Id/index.md)
- `string Subject {get;}` — GGets message subject. [details](https://help.ctrader.com/ctrader-algo/references/Messages/MessageSubscription/Subject/index.md)