[Home](./index.md) > [@workgrid/client](./client.md) > [Client](./client.client.md) > [mutate](./client.client.mutate.md) ## Client.mutate() method > This API is provided as a preview for developers and may change based on feedback that we receive. Do not use this API in a production environment. > Invoke a mutation Signature: ```typescript mutate(mutationKey: MutationKey, variables?: M['TVariables'], options?: MutationOptions): Promise; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | mutationKey | MutationKey<K, M> | The mutation key (must be pre-defined) | | variables | M\['TVariables'\] | The appropriate variables | | options | MutationOptions<M\['TData'\], M\['TError'\], M\['TVariables'\], M\['TContext'\]> | Any additional mutation options | Returns: Promise<M\['TData'\]> The mutation result