diff --git a/README.md b/README.md
index d6a394c..e04badd 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ Sign in through the browser once per machine:
 upstash login --oauth
 ```
 
-The consent page lets you pick a personal or team scope and whether the login is read-only. To switch teams, run it again. Team management commands (`team create`, `team delete`, `team add-member`, `team remove-member`) need an API key login.
+The consent page lets you pick a personal or team scope and whether the login is read-only. To switch teams, run it again. Team management commands (`team create`, `team delete`, `team add-member`, `team remove-member`) need an API key login. `upstash box` commands work with a browser login or a Box API key (`UPSTASH_BOX_API_KEY` or `--token`), not with a Developer API key.
 
 Or grab a Developer API key from the [Upstash Console](https://console.upstash.com/account/api) and save it with `upstash login`, or set `UPSTASH_EMAIL` and `UPSTASH_API_KEY` in your shell or a `.env` file (recommended for CI and agents). `upstash whoami` shows which credentials are in use. See the [auth docs](https://upstash.com/docs/agent-resources/cli#authentication) for env files, per-command flags, and precedence rules.
 
@@ -56,6 +56,11 @@ upstash redis list
 upstash redis create --name my-db --region us-east-1
 upstash redis exec --db-url $URL --db-token $TOKEN GET key
 
+# Upstash Box (browser login or a Box API key; same commands as the `box` CLI)
+upstash box list
+upstash box create --name my-box
+upstash box exec --box my-box -- ls
+
 # Vector
 upstash vector list
 upstash vector create --name my-index --region us-east-1 --similarity-function COSINE --dimension-count 1536
diff --git a/package.json b/package.json
index 4491786..a87e5aa 100644
--- a/package.json
+++ b/package.json
@@ -25,6 +25,7 @@
   "author": "Upstash",
   "license": "MIT",
   "dependencies": {
+    "@upstash/box-cli": "^0.4.0",
     "commander": "^13.0.0",
     "dotenv": "^16.4.5"
   },
diff --git a/src/cli.ts b/src/cli.ts
index ae474dd..a3032ce 100644
--- a/src/cli.ts
+++ b/src/cli.ts
@@ -8,6 +8,7 @@ import { registerVector } from "./commands/vector/index.js";
 import { registerSearch } from "./commands/search/index.js";
 import { registerQStash } from "./commands/qstash/index.js";
 import { registerBlob } from "./commands/blob/index.js";
+import { registerBox } from "./commands/box.js";
 import { registerLogin } from "./commands/login.js";
 import { registerLogout } from "./commands/logout.js";
 import { registerWhoami } from "./commands/whoami.js";
@@ -52,5 +53,6 @@ registerVector(program);
 registerSearch(program);
 registerQStash(program);
 registerBlob(program);
+registerBox(program);
 
 program.parseAsync().catch(handleError);
diff --git a/src/commands/box.ts b/src/commands/box.ts
new file mode 100644
index 0000000..c8cf913
--- /dev/null
+++ b/src/commands/box.ts
@@ -0,0 +1,34 @@
+import type { Command } from "commander";
+import { buildBoxProgram, setDefaultToken } from "@upstash/box-cli";
+import { envApiKeyAuth } from "../auth.js";
+import { readOAuth } from "../config.js";
+import { getAccessToken } from "../oauth/refresh.js";
+import { plainError } from "../output.js";
+
+export const BOX_NEEDS_OAUTH_OR_BOX_KEY =
+  "Upstash Box commands need a browser login (`upstash login --oauth`) or a Box API key (--token or UPSTASH_BOX_API_KEY). Developer API keys are not accepted by Upstash Box.";
+
+// Commands that never contact the API and so need no credential.
+const NO_CREDENTIAL = new Set(["completion", "use"]);
+
+export function registerBox(program: Command): void {
+  const box = buildBoxProgram()
+    .name("box")
+    .description("Upstash Box sandboxes (the same commands as the `box` CLI)");
+  // The root parses positional options for the box tree; pass-through stays with `exec` itself.
+  box.passThroughOptions(false);
+  box.hook("preAction", async (_root, actionCommand) => {
+    if (NO_CREDENTIAL.has(actionCommand.name())) return;
+    const flags = actionCommand.optsWithGlobals() as { token?: string };
+    if (flags.token || process.env.UPSTASH_BOX_API_KEY) return;
+    // A Developer API key is useless here, so a saved browser login wins even when one is set.
+    if (readOAuth()) {
+      setDefaultToken(await getAccessToken());
+      return;
+    }
+    const env = envApiKeyAuth();
+    const shadow = env.email || env.apiKey ? " UPSTASH_EMAIL / UPSTASH_API_KEY are set, but they cannot be used here." : "";
+    throw plainError(BOX_NEEDS_OAUTH_OR_BOX_KEY + shadow);
+  });
+  program.addCommand(box);
+}
diff --git a/tests/unit/box.test.ts b/tests/unit/box.test.ts
new file mode 100644
index 0000000..a302e38
--- /dev/null
+++ b/tests/unit/box.test.ts
@@ -0,0 +1,119 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { mkdtempSync, rmSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { Command } from "commander";
+import { writeConfig, writeOAuth, writeOAuthClient } from "../../src/config.js";
+import { BOX_NEEDS_OAUTH_OR_BOX_KEY, registerBox } from "../../src/commands/box.js";
+
+const ISSUER = "https://issuer.test";
+const now = () => Math.floor(Date.now() / 1000);
+
+let dir: string;
+const originalEnv = { ...process.env };
+
+function program(): Command {
+  const p = new Command()
+    .exitOverride()
+    .option("--email <email>")
+    .option("--api-key <key>")
+    .configureOutput({ writeOut: () => {}, writeErr: () => {} });
+  registerBox(p);
+  return p;
+}
+
+async function run(argv: string[]): Promise<void> {
+  const origLog = console.log;
+  const origError = console.error;
+  console.log = () => {};
+  console.error = () => {};
+  try {
+    await program().parseAsync(["node", "upstash", ...argv]);
+  } finally {
+    console.log = origLog;
+    console.error = origError;
+  }
+}
+
+const okList = () => Promise.resolve(new Response("[]", { status: 200 }));
+
+function authHeaderOf(): Record<string, string> {
+  return vi.mocked(fetch).mock.calls[0]![1]!.headers as Record<string, string>;
+}
+
+beforeEach(() => {
+  dir = mkdtempSync(join(tmpdir(), "upstash-cli-box-"));
+  process.env.UPSTASH_CONFIG_HOME = dir;
+  process.env.UPSTASH_LEGACY_CONFIG_HOME = dir;
+  delete process.env.UPSTASH_EMAIL;
+  delete process.env.UPSTASH_API_KEY;
+  delete process.env.UPSTASH_BOX_API_KEY;
+});
+
+afterEach(() => {
+  vi.restoreAllMocks();
+  process.exitCode = undefined;
+  rmSync(dir, { recursive: true, force: true });
+  process.env = { ...originalEnv };
+});
+
+describe("upstash box", () => {
+  it("hands the OAuth access token to the box commands as a Bearer credential", async () => {
+    writeOAuthClient({ issuer: ISSUER, client_id: "cid", redirect_uri: "http://127.0.0.1/callback", registered_at: now() });
+    writeOAuth({ issuer: ISSUER, access_token: "a.b.c", refresh_token: "rt", expires_at: now() + 86400 });
+    const fetchSpy = vi.spyOn(globalThis, "fetch").mockImplementation(okList);
+
+    await run(["box", "list", "--json"]);
+
+    expect(fetchSpy).toHaveBeenCalledTimes(1);
+    expect(authHeaderOf().Authorization).toBe("Bearer a.b.c");
+  });
+
+  it("uses the saved browser login even when Developer API key env vars are set", async () => {
+    writeOAuthClient({ issuer: ISSUER, client_id: "cid", redirect_uri: "http://127.0.0.1/callback", registered_at: now() });
+    writeOAuth({ issuer: ISSUER, access_token: "a.b.c", refresh_token: "rt", expires_at: now() + 86400 });
+    process.env.UPSTASH_EMAIL = "env@b.com";
+    process.env.UPSTASH_API_KEY = "k";
+    vi.spyOn(globalThis, "fetch").mockImplementation(okList);
+
+    await run(["box", "list", "--json"]);
+    expect(authHeaderOf().Authorization).toBe("Bearer a.b.c");
+  });
+
+  it("names the shadowing env vars when there is no browser login", async () => {
+    process.env.UPSTASH_EMAIL = "env@b.com";
+    process.env.UPSTASH_API_KEY = "k";
+    await expect(run(["box", "list"])).rejects.toThrow(/UPSTASH_EMAIL \/ UPSTASH_API_KEY are set/);
+  });
+
+  it("runs commands that need no credential without any login", async () => {
+    const fetchSpy = vi.spyOn(globalThis, "fetch");
+    await run(["box", "completion"]);
+    expect(fetchSpy).not.toHaveBeenCalled();
+  });
+
+  it("refuses a Developer API key login, and no login at all, with one message", async () => {
+    const fetchSpy = vi.spyOn(globalThis, "fetch");
+    await expect(run(["box", "list"])).rejects.toThrow(BOX_NEEDS_OAUTH_OR_BOX_KEY);
+    writeConfig({ email: "a@b.com", apiKey: "k" });
+    await expect(run(["box", "list"])).rejects.toThrow(BOX_NEEDS_OAUTH_OR_BOX_KEY);
+    await expect(run(["box", "list", "--email", "a@b.com", "--api-key", "k"])).rejects.toThrow(
+      BOX_NEEDS_OAUTH_OR_BOX_KEY,
+    );
+    expect(fetchSpy).not.toHaveBeenCalled();
+  });
+
+  it("leaves a Box API key from the environment or --token to the box commands", async () => {
+    writeConfig({ email: "a@b.com", apiKey: "k" });
+    process.env.UPSTASH_BOX_API_KEY = "abx_env";
+    const fetchSpy = vi.spyOn(globalThis, "fetch").mockImplementation(okList);
+
+    await run(["box", "list", "--json"]);
+    expect(authHeaderOf()["X-Box-Api-Key"]).toBe("abx_env");
+
+    delete process.env.UPSTASH_BOX_API_KEY;
+    fetchSpy.mockClear();
+    await run(["box", "list", "--json", "--token", "abx_flag"]);
+    expect(authHeaderOf()["X-Box-Api-Key"]).toBe("abx_flag");
+  });
+});