diff --git a/data/runs.json b/data/runs.json
index 7ba127f..97be9c8 100644
--- a/data/runs.json
+++ b/data/runs.json
@@ -732,5 +732,15 @@
   "output": "tapped testid=busyRowB at (540, 1095)\ngray box: waited 307 ms for the app to go idle (busy: quiet)",
   "caption": "`mobium tap testid=busyRowB` on MobiumApp's Busy Demo, Android 15 emulator, launched with `--gray-box`: the tap waited for the quiet refresh to finish, and Row B is the new generation's",
   "after": "/img/shots/app_tap-3-after.jpg"
+ },
+ "app_hook[0]": {
+  "tool": "app_hook",
+  "index": 0,
+  "command": "mobium hook raiseToast \"Toast raised by test script\"",
+  "verbatim": true,
+  "exit": 0,
+  "output": "hook raiseToast answered: \"shown\"\ngray box: the app was idle",
+  "caption": "`mobium hook raiseToast \"Toast raised by test script\"` on MobiumApp, Android 15 emulator, launched with `--gray-box`: the app's own toast says what the hook was sent",
+  "after": "/img/shots/app_hook-0-after.jpg"
  }
 }
diff --git a/examples/canonical.json b/examples/canonical.json
index b8aaae7..042486b 100644
--- a/examples/canonical.json
+++ b/examples/canonical.json
@@ -903,5 +903,17 @@
         "name": "mobium-test"
       }
     }
+  ],
+  "app_hook": [
+    {
+      "title": "Call a hook the app registered, and get back what it answered",
+      "cli": "mobium hook raiseToast \"Toast raised by test script\"",
+      "args": {
+        "hook": "raiseToast",
+        "args": [
+          "Toast raised by test script"
+        ]
+      }
+    }
   ]
 }
diff --git a/examples/dotnet.json b/examples/dotnet.json
index 2460f48..9e94b30 100644
--- a/examples/dotnet.json
+++ b/examples/dotnet.json
@@ -459,6 +459,11 @@
       {
         "code": "device.Shutdown(\"mobium-test\");"
       }
+    ],
+    "app_hook": [
+      {
+        "code": "device.LaunchWithGrayBox(\"dev.mobium.mobiumapp\");\nvar answer = device.Hook(\"raiseToast\", \"Toast raised by test script\");   // \"shown\""
+      }
     ]
   },
   "members": {
diff --git a/examples/go.json b/examples/go.json
index 0d83a69..cac0fec 100644
--- a/examples/go.json
+++ b/examples/go.json
@@ -459,6 +459,11 @@
       {
         "code": "if err := dev.Shutdown(ctx, \"mobium-test\"); err != nil {\n\treturn err\n}"
       }
+    ],
+    "app_hook": [
+      {
+        "code": "if err := dev.LaunchWithGrayBox(ctx, \"dev.mobium.mobiumapp\"); err != nil {\n\treturn err\n}\nanswer, err := dev.Hook(ctx, \"raiseToast\", \"Toast raised by test script\")\nif err != nil {\n\treturn err\n}\nfmt.Println(answer) // shown"
+      }
     ]
   },
   "members": {
diff --git a/examples/java.json b/examples/java.json
index 1533ce8..33ca858 100644
--- a/examples/java.json
+++ b/examples/java.json
@@ -459,6 +459,11 @@
       {
         "code": "device.shutdown(\"mobium-test\");"
       }
+    ],
+    "app_hook": [
+      {
+        "code": "device.launchWithGrayBox(\"dev.mobium.mobiumapp\");\nObject answer = device.hook(\"raiseToast\", \"Toast raised by test script\");   // \"shown\""
+      }
     ]
   },
   "members": {
diff --git a/examples/javascript.json b/examples/javascript.json
index cadfac0..f326e85 100644
--- a/examples/javascript.json
+++ b/examples/javascript.json
@@ -459,6 +459,11 @@
       {
         "code": "await device.shutdown('mobium-test')"
       }
+    ],
+    "app_hook": [
+      {
+        "code": "await device.launch('dev.mobium.mobiumapp', { grayBox: true })\nconsole.log(await device.hook('raiseToast', 'Toast raised by test script'))   // shown"
+      }
     ]
   },
   "members": {
diff --git a/examples/python.json b/examples/python.json
index 06964f2..5445334 100644
--- a/examples/python.json
+++ b/examples/python.json
@@ -459,6 +459,11 @@
       {
         "code": "device.shutdown(\"mobium-test\")"
       }
+    ],
+    "app_hook": [
+      {
+        "code": "device.launch(\"dev.mobium.mobiumapp\", gray_box=True)\nprint(device.hook(\"raiseToast\", \"Toast raised by test script\"))   # shown"
+      }
     ]
   },
   "members": {
diff --git a/scripts/capture.py b/scripts/capture.py
index 7198028..ab69f74 100644
--- a/scripts/capture.py
+++ b/scripts/capture.py
@@ -62,6 +62,10 @@ def app_screen(name):
     dict(tool="app_launch", i=0, setup=[f"terminate {SETTINGS}"], after=True),
     # MobiumApp links Mobium's gray-box library; the launch says the app answered.
     dict(tool="app_launch", i=1, setup=[f"terminate {APP}"]),
+    # A gray-box hook: MobiumApp's raiseToast draws its message in a toast.
+    dict(tool="app_hook", i=0, setup=[f"terminate {APP}", f"launch --gray-box {APP}"], after=True,
+         caption="`mobium hook raiseToast \"Toast raised by test script\"` on MobiumApp, Android 15 emulator, "
+                 "launched with `--gray-box`: the app's own toast says what the hook was sent"),
     dict(tool="app_map", i=0, setup=settings_root(), after=True),
     dict(tool="app_text", i=0, setup=settings_root(), after=True),
     dict(tool="app_find", i=0, setup=settings_root(), after=True),
diff --git a/static/img/shots/app_hook-0-after.jpg b/static/img/shots/app_hook-0-after.jpg
new file mode 100644
index 0000000..7c54f9a
Binary files /dev/null and b/static/img/shots/app_hook-0-after.jpg differ