diff --git a/example/src/modules/httpInterfaceServer.ts b/example/src/modules/httpInterfaceServer.ts
index d24e672..f983baa 100644
--- a/example/src/modules/httpInterfaceServer.ts
+++ b/example/src/modules/httpInterfaceServer.ts
@@ -218,8 +218,14 @@ export default class HTTPInterfaceServer extends AbstractInterfaceServer<Config>
                     if (op === null || !AASCoreTypes.isOperation(op)) return res.status(404).end();
                     
                     try {
-                        this.onRequestCallback({ type: "invokeAction", target: op, extraData: { args: req.body, async: false } });
-                        return res.send(204).end();
+                        // This will probably need some rework in production code
+                        const result = this.onRequestCallback({ type: "invokeAction", target: op, extraData: { args: req.body, async: false } });
+                        if (result) {
+                            if (req.accepts("json")) res.setHeader("content-type", "application/json");
+                            return res.status(200).send(result).end();
+                        } else {
+                            return res.status(204).end();
+                        }
                     } catch {
                         return res.status(500).end();
                     }