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# Function isRpcCall

*   <a id="isrpccall"></a>
    
    ```typescript
    isRpcCall(data: WireFrameInput): data is RpcCallFrame
    ```
    
    Types: [WireFrameInput](../types/core.Supporting_types.WireFrameInput.md), [RpcCallFrame](../types/core.RpcCallFrame.md)
    
    A project→host RPC request: requires a numeric `id` and string `method`.
    
    #### Parameters
    
    *   data: [WireFrameInput](../types/core.Supporting_types.WireFrameInput.md)
    
    #### Returns data is [RpcCallFrame](../types/core.RpcCallFrame.md)