diff --git a/deploy/mod.ts b/deploy/mod.ts
index a5dc85e..a7792d5 100644
--- a/deploy/mod.ts
+++ b/deploy/mod.ts
@@ -2,6 +2,7 @@ import { Command, ValidationError } from "@cliffy/command";
 import { green, red, yellow } from "@std/fmt/colors";
 import { error, renderTemporalTimestamp } from "../util.ts";
 import { createSwitchCommand, type GlobalContext } from "../main.ts";
+import { VERSION } from "../version.ts";
 import { actionHandler, getApp, getOrg } from "../config.ts";
 import { publish } from "./publish.ts";
 import { setupAws, setupGcp } from "./setup-cloud.ts";
@@ -181,6 +182,7 @@ const logoutCommand = new Command()
 
 export const deployCommand = new Command()
   .name("deno deploy")
+  .version(VERSION)
   .description(`Interact with Deno Deploy
 
 Calling this subcommand without any further subcommands will
@@ -223,6 +225,14 @@ deploy your local directory to the specified application.`)
     if (tokenEnv) {
       tokenStorage.set(tokenEnv, true);
     }
+
+    if (options.debug) {
+      console.error(
+        yellow(
+          `Debug mode is enabled (deno ${Deno.version.deno}, @deno/deploy ${VERSION}, endpoint=${options.endpoint})`,
+        ),
+      );
+    }
   })
   .action(
     actionHandler(
diff --git a/sandbox/mod.ts b/sandbox/mod.ts
index 342563f..cf2b8c3 100644
--- a/sandbox/mod.ts
+++ b/sandbox/mod.ts
@@ -5,7 +5,7 @@ import {
   type VolumeId,
   type VolumeSlug,
 } from "@deno/sandbox";
-import { green, magenta, red } from "@std/fmt/colors";
+import { green, magenta, red, yellow } from "@std/fmt/colors";
 import { pooledMap } from "@std/async";
 import { expandGlob } from "@std/fs";
 import { join } from "@std/path";
@@ -19,6 +19,7 @@ import {
 } from "../util.ts";
 import { createTrpcClient, getAuth, tokenStorage } from "../auth.ts";
 import { createSwitchCommand, type GlobalContext } from "../main.ts";
+import { VERSION } from "../version.ts";
 
 import { volumesCommand } from "./volumes.ts";
 import { snapshotsCommand } from "./snapshot.ts";
@@ -588,6 +589,7 @@ Example:
 
 export const sandboxCommand = new Command<GlobalContext>()
   .name("deno sandbox")
+  .version(VERSION)
   .description("Interact with sandboxes")
   .globalOption("--endpoint <endpoint:string>", "the endpoint", {
     default: "https://console.deno.com",
@@ -615,6 +617,14 @@ export const sandboxCommand = new Command<GlobalContext>()
     if (tokenEnv) {
       tokenStorage.set(tokenEnv, true);
     }
+
+    if (options.debug) {
+      console.error(
+        yellow(
+          `Debug mode is enabled (deno ${Deno.version.deno}, @deno/deploy ${VERSION}, endpoint=${options.endpoint})`,
+        ),
+      );
+    }
   })
   .action(() => {
     sandboxCommand.showHelp();
diff --git a/version.ts b/version.ts
new file mode 100644
index 0000000..0db14dc
--- /dev/null
+++ b/version.ts
@@ -0,0 +1,4 @@
+import denoJson from "./deno.json" with { type: "json" };
+
+export const VERSION = (denoJson as { version?: string }).version ??
+  "0.0.0-dev";