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title: Objects
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# Objects

Canvas provides an SDK that contains objects that enable communication between your canvas app and Salesforce.

-   **[CanvasRequest](https://developer.salesforce.com/docs/platform/canvas-framework/guide/canvas-request-object.md)**  

-   **[Controller](https://developer.salesforce.com/docs/platform/canvas-framework/guide/controller-object.md)**  

-   **[SignedRequest](https://developer.salesforce.com/docs/platform/canvas-framework/guide/signed-request-object.md)**  


**See Also**  


-   [CanvasRequest](https://developer.salesforce.com/docs/platform/canvas-framework/guide/canvas-request-object.md)
-   [SignedRequest](https://developer.salesforce.com/docs/platform/canvas-framework/guide/signed-request-object.md)