diff --git a/README.md b/README.md
index f969916..4337932 100644
--- a/README.md
+++ b/README.md
@@ -195,6 +195,28 @@ jobs:
           body: "Hello, World!"
 ```
 
+### Create a token for an enterprise installation
+
+```yaml
+on: [workflow_dispatch]
+
+jobs:
+  hello-world:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/create-github-app-token@v2
+        id: app-token
+        with:
+          app-id: ${{ vars.APP_ID }}
+          private-key: ${{ secrets.PRIVATE_KEY }}
+          enterprise: my-enterprise-slug
+      - name: Call enterprise management REST API with gh
+        run: |
+          gh api /enterprises/my-enterprise-slug/apps/installable_organizations
+        env:
+          GH_TOKEN: ${{ steps.app-token.outputs.token }}
+```
+
 ### Create a token with specific permissions
 
 > [!NOTE]
@@ -335,6 +357,13 @@ steps:
 > [!NOTE]
 > If `owner` is set and `repositories` is empty, access will be scoped to all repositories in the provided repository owner's installation. If `owner` and `repositories` are empty, access will be scoped to only the current repository.
 
+### `enterprise`
+
+**Optional:** The slug of the enterprise to generate a token for enterprise-level app installations.
+
+> [!NOTE]
+> The `enterprise` input is mutually exclusive with `owner` and `repositories`. GitHub Apps can be installed on enterprise accounts with permissions that let them call enterprise management APIs. Enterprise installations do not grant access to organization or repository resources.
+
 ### `permission-<permission name>`
 
 **Optional:** The permissions to grant to the token. By default, the token inherits all of the installation's permissions. We recommend to explicitly list the permissions that are required for a use case. This follows GitHub's own recommendation to [control permissions of `GITHUB_TOKEN` in workflows](https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/controlling-permissions-for-github_token). The documentation also lists all available permissions, just prefix the permission key with `permission-` (e.g., `pull-requests` → `permission-pull-requests`).
diff --git a/tests/main-enterprise-installation-not-found.test.js b/tests/main-enterprise-installation-not-found.test.js
new file mode 100644
index 0000000..ca27b31
--- /dev/null
+++ b/tests/main-enterprise-installation-not-found.test.js
@@ -0,0 +1,39 @@
+import { test } from "./main.js";
+delete process.env.INPUT_OWNER;
+delete process.env.INPUT_REPOSITORIES;
+
+// Verify `main` handles when no enterprise installation is found.
+await test((mockPool) => {
+  process.env.INPUT_ENTERPRISE = "test-enterprise";
+  
+
+  // Mock the /app/installations endpoint to return only non-enterprise installations
+  mockPool
+    .intercept({
+      path: "/app/installations",
+      method: "GET",
+      headers: {
+        accept: "application/vnd.github.v3+json",
+        "user-agent": "actions/create-github-app-token",
+        // Intentionally omitting the `authorization` header, since JWT creation is not idempotent.
+      },
+    })
+    .reply(
+      200,
+      [
+        {
+          id: "111111",
+          app_slug: "github-actions",
+          target_type: "Organization",
+          account: { login: "some-org" }
+        },
+        {
+          id: "222222",
+          app_slug: "github-actions",
+          target_type: "User",
+          account: { login: "some-user" }
+        }
+      ],
+      { headers: { "content-type": "application/json" } }
+    );
+});
diff --git a/tests/main-enterprise-mutual-exclusivity-both.test.js b/tests/main-enterprise-mutual-exclusivity-both.test.js
new file mode 100644
index 0000000..f4b5e3b
--- /dev/null
+++ b/tests/main-enterprise-mutual-exclusivity-both.test.js
@@ -0,0 +1,16 @@
+import { DEFAULT_ENV } from "./main.js";
+
+// Verify `main` exits with an error when `enterprise` is used with both `owner` and `repositories` inputs.
+try {
+  // Set up environment with enterprise, owner, and repositories all set
+  for (const [key, value] of Object.entries(DEFAULT_ENV)) {
+    process.env[key] = value;
+  }
+  process.env.INPUT_ENTERPRISE = "test-enterprise";
+  process.env.INPUT_OWNER = "test-owner";
+  process.env.INPUT_REPOSITORIES = "repo1,repo2";
+  
+  await import("../main.js");
+} catch (error) {
+  console.error(error.message);
+}
diff --git a/tests/main-enterprise-mutual-exclusivity-owner.test.js b/tests/main-enterprise-mutual-exclusivity-owner.test.js
new file mode 100644
index 0000000..59ec637
--- /dev/null
+++ b/tests/main-enterprise-mutual-exclusivity-owner.test.js
@@ -0,0 +1,15 @@
+import { DEFAULT_ENV } from "./main.js";
+
+// Verify `main` exits with an error when `enterprise` is used with `owner` input.
+try {
+  // Set up environment with enterprise and owner both set
+  for (const [key, value] of Object.entries(DEFAULT_ENV)) {
+    process.env[key] = value;
+  }
+  process.env.INPUT_ENTERPRISE = "test-enterprise";
+  process.env.INPUT_OWNER = "test-owner";
+  
+  await import("../main.js");
+} catch (error) {
+  console.error(error.message);
+}
diff --git a/tests/main-enterprise-mutual-exclusivity-repositories.test.js b/tests/main-enterprise-mutual-exclusivity-repositories.test.js
new file mode 100644
index 0000000..893c7de
--- /dev/null
+++ b/tests/main-enterprise-mutual-exclusivity-repositories.test.js
@@ -0,0 +1,15 @@
+import { DEFAULT_ENV } from "./main.js";
+
+// Verify `main` exits with an error when `enterprise` is used with `repositories` input.
+try {
+  // Set up environment with enterprise and repositories both set
+  for (const [key, value] of Object.entries(DEFAULT_ENV)) {
+    process.env[key] = value;
+  }
+  process.env.INPUT_ENTERPRISE = "test-enterprise";
+  process.env.INPUT_REPOSITORIES = "repo1,repo2";
+  
+  await import("../main.js");
+} catch (error) {
+  console.error(error.message);
+}
diff --git a/tests/main-enterprise-only-success.test.js b/tests/main-enterprise-only-success.test.js
new file mode 100644
index 0000000..dae89bc
--- /dev/null
+++ b/tests/main-enterprise-only-success.test.js
@@ -0,0 +1,34 @@
+import { test } from "./main.js";
+
+// Verify `main` successfully obtains a token when only the `enterprise` input is set.
+await test((mockPool) => {
+  process.env.INPUT_ENTERPRISE = "test-enterprise";
+  delete process.env.INPUT_OWNER;
+  delete process.env.INPUT_REPOSITORIES;
+
+  // Mock the /app/installations endpoint to return an enterprise installation
+  const mockInstallationId = "123456";
+  const mockAppSlug = "github-actions";
+  mockPool
+    .intercept({
+      path: "/app/installations",
+      method: "GET",
+      headers: {
+        accept: "application/vnd.github.v3+json",
+        "user-agent": "actions/create-github-app-token",
+        // Intentionally omitting the `authorization` header, since JWT creation is not idempotent.
+      },
+    })
+    .reply(
+      200,
+      [
+        {
+          id: mockInstallationId,
+          app_slug: mockAppSlug,
+          target_type: "Enterprise",
+          account: { login: "test-enterprise" }
+        }
+      ],
+      { headers: { "content-type": "application/json" } }
+    );
+});
diff --git a/tests/main-enterprise-token-success.test.js b/tests/main-enterprise-token-success.test.js
new file mode 100644
index 0000000..197348e
--- /dev/null
+++ b/tests/main-enterprise-token-success.test.js
@@ -0,0 +1,34 @@
+import { test } from "./main.js";
+
+// Verify `main` successfully generates enterprise token with basic functionality.
+await test((mockPool) => {
+  process.env.INPUT_ENTERPRISE = "test-enterprise";
+  delete process.env.INPUT_OWNER;
+  delete process.env.INPUT_REPOSITORIES;
+
+  // Mock the /app/installations endpoint to return an enterprise installation
+  const mockInstallationId = "123456";
+  const mockAppSlug = "github-actions";
+  mockPool
+    .intercept({
+      path: "/app/installations",
+      method: "GET",
+      headers: {
+        accept: "application/vnd.github.v3+json",
+        "user-agent": "actions/create-github-app-token",
+        // Intentionally omitting the `authorization` header, since JWT creation is not idempotent.
+      },
+    })
+    .reply(
+      200,
+      [
+        {
+          id: mockInstallationId,
+          app_slug: mockAppSlug,
+          target_type: "Enterprise",
+          account: { login: "test-enterprise" }
+        }
+      ],
+      { headers: { "content-type": "application/json" } }
+    );
+});
diff --git a/tests/main-enterprise-token-with-permissions.test.js b/tests/main-enterprise-token-with-permissions.test.js
new file mode 100644
index 0000000..ab2a160
--- /dev/null
+++ b/tests/main-enterprise-token-with-permissions.test.js
@@ -0,0 +1,36 @@
+import { test } from "./main.js";
+
+// Verify `main` successfully generates enterprise token with specific permissions.
+await test((mockPool) => {
+  process.env.INPUT_ENTERPRISE = "test-enterprise";
+  delete process.env.INPUT_OWNER;
+  delete process.env.INPUT_REPOSITORIES;
+  process.env["INPUT_PERMISSION-ENTERPRISE-ORGANIZATIONS"] = "read";
+  process.env["INPUT_PERMISSION-ENTERPRISE-PEOPLE"] = "write";
+
+  // Mock the /app/installations endpoint to return an enterprise installation
+  const mockInstallationId = "123456";
+  const mockAppSlug = "github-actions";
+  mockPool
+    .intercept({
+      path: "/app/installations",
+      method: "GET",
+      headers: {
+        accept: "application/vnd.github.v3+json",
+        "user-agent": "actions/create-github-app-token",
+        // Intentionally omitting the `authorization` header, since JWT creation is not idempotent.
+      },
+    })
+    .reply(
+      200,
+      [
+        {
+          id: mockInstallationId,
+          app_slug: mockAppSlug,
+          target_type: "Enterprise",
+          account: { login: "test-enterprise" }
+        }
+      ],
+      { headers: { "content-type": "application/json" } }
+    );
+});
diff --git a/tests/snapshots/index.js.md b/tests/snapshots/index.js.md
index e419536..dfd7473 100644
--- a/tests/snapshots/index.js.md
+++ b/tests/snapshots/index.js.md
@@ -39,6 +39,99 @@ Generated by [AVA](https://avajs.dev).
     POST /api/v3/app/installations/123456/access_tokens␊
     {"repositories":["create-github-app-token"]}`
 
+## main-enterprise-only-success.test.js
+
+> stderr
+
+    ''
+
+> stdout
+
+    `Creating enterprise installation token for enterprise "test-enterprise".␊
+    ### Found enterprise installation: {␊
+      "id": "123456",␊
+      "app_slug": "github-actions",␊
+      "target_type": "Enterprise",␊
+      "account": {␊
+        "login": "test-enterprise"␊
+      }␊
+    }␊
+    ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=installation-id::123456␊
+    ␊
+    ::set-output name=app-slug::github-actions␊
+    ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ::save-state name=expiresAt::2016-07-11T22:14:10Z␊
+    --- REQUESTS ---␊
+    GET /app/installations␊
+    POST /app/installations/123456/access_tokens␊
+    null`
+
+## main-enterprise-token-success.test.js
+
+> stderr
+
+    ''
+
+> stdout
+
+    `Creating enterprise installation token for enterprise "test-enterprise".␊
+    ### Found enterprise installation: {␊
+      "id": "123456",␊
+      "app_slug": "github-actions",␊
+      "target_type": "Enterprise",␊
+      "account": {␊
+        "login": "test-enterprise"␊
+      }␊
+    }␊
+    ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=installation-id::123456␊
+    ␊
+    ::set-output name=app-slug::github-actions␊
+    ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ::save-state name=expiresAt::2016-07-11T22:14:10Z␊
+    --- REQUESTS ---␊
+    GET /app/installations␊
+    POST /app/installations/123456/access_tokens␊
+    null`
+
+## main-enterprise-token-with-permissions.test.js
+
+> stderr
+
+    ''
+
+> stdout
+
+    `Creating enterprise installation token for enterprise "test-enterprise".␊
+    ### Found enterprise installation: {␊
+      "id": "123456",␊
+      "app_slug": "github-actions",␊
+      "target_type": "Enterprise",␊
+      "account": {␊
+        "login": "test-enterprise"␊
+      }␊
+    }␊
+    ::add-mask::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ␊
+    ::set-output name=installation-id::123456␊
+    ␊
+    ::set-output name=app-slug::github-actions␊
+    ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
+    ::save-state name=expiresAt::2016-07-11T22:14:10Z␊
+    --- REQUESTS ---␊
+    GET /app/installations␊
+    POST /app/installations/123456/access_tokens␊
+    {"permissions":{"enterprise_organizations":"read","enterprise_people":"write"}}`
+
 ## main-missing-owner.test.js
 
 > stderr
diff --git a/tests/snapshots/index.js.snap b/tests/snapshots/index.js.snap
index 773f4b1..edde164 100644
Binary files a/tests/snapshots/index.js.snap and b/tests/snapshots/index.js.snap differ