### Adding and Configuring Service Callout Actions in Message Flows

Use a service callout action to configure a synchronous (blocking) callout to an ALSB-registered proxy or business service.

Before you begin

Display the message flow for the desired proxy service. See Constructing Proxy Service Message Flows.

To add a service callout action

1. In the Message Flow Design Palette, open the Stage Actions > Communication list, if it is not already open.
2. Drag the service callout action to the desired location in the message flow.

To configure the service callout action

1. In the Message Flow Editor, click the service callout action, if it is not already selected.
2. On the Service Callout Action Properties page, edit properties as appropriate.