diff --git a/nre/apps/ipc/delegate/delegate.cc b/nre/apps/ipc/delegate/delegate.cc
index 110b177..87506da 100644
--- a/nre/apps/ipc/delegate/delegate.cc
+++ b/nre/apps/ipc/delegate/delegate.cc
@@ -24,14 +24,15 @@ static Pt *echo;
 
 PORTAL static void portal_getcap(void*) {
     UtcbFrameRef uf;
-    // TODO delegate cap
+    uf.delegate(echo->sel());
 }
 
 PORTAL static void portal_echo(void*) {
     UtcbFrameRef uf;
-    // TODO receive integer
+    int x;
+    uf >> x;
     uf.finish_input();
-    // TODO echo integer back
+    uf << x;
 }
 
 // provides the echo portal
@@ -42,10 +43,22 @@ static void service() {
 
 // wants to call the echo portal
 static void client(Pt &getcap) {
-    // TODO request echo portal cap
+    capsel_t cap = CapSelSpace::get().allocate(1);
+    {
+        UtcbFrame uf;
+        uf.delegation_window(Crd(cap,0,Crd::OBJ_ALL));
+        getcap.call(uf);
+    }
 
+    // call portal
     int res;
-    // TODO call portal
+    {
+        Pt echopt(cap);
+        UtcbFrame uf;
+        uf << 42;
+        echopt.call(uf);
+        uf >> res;
+    }
 
     Serial::get() << "Hello World: " << res << "\n";
 }
diff --git a/nre/apps/ipc/echo/echo.cc b/nre/apps/ipc/echo/echo.cc
index ec5249f..d6ce9ce 100644
--- a/nre/apps/ipc/echo/echo.cc
+++ b/nre/apps/ipc/echo/echo.cc
@@ -22,9 +22,10 @@ using namespace nre;
 
 PORTAL static void portal_echo(void*) {
     UtcbFrameRef uf;
-    // TODO receive integer
+    int x;
+    uf >> x;
     uf.finish_input();
-    // TODO echo integer back
+    uf << x;
 }
 
 int main() {
diff --git a/nre/apps/ipc/service/service.cc b/nre/apps/ipc/service/service.cc
index 882eff1..c702db3 100644
--- a/nre/apps/ipc/service/service.cc
+++ b/nre/apps/ipc/service/service.cc
@@ -19,7 +19,11 @@
 using namespace nre;
 
 PORTAL static void portal_echo(void*) {
-    // TODO implement me
+    UtcbFrameRef uf;
+    int x;
+    uf >> x;
+    uf.finish_input();
+    uf << x;
 }
 
 int main() {