diff --git a/package.json b/package.json
index 80285ff..cafee26 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@updatedev/js",
-  "version": "0.2.2",
+  "version": "0.3.0",
   "description": "Update JavaScript SDK",
   "main": "./dist/index.js",
   "files": [
diff --git a/src/providers/supabase/UpdateBillingClient.ts b/src/providers/supabase/UpdateBillingClient.ts
index ff0ff6c..a99b236 100644
--- a/src/providers/supabase/UpdateBillingClient.ts
+++ b/src/providers/supabase/UpdateBillingClient.ts
@@ -10,8 +10,7 @@ import {
   CreateCheckoutSessionOptions,
 } from '../../types/billing';
 import { UpdateClientBillingOptions } from '../../types/options';
-
-const ENVIRONMENT_HEADER = 'X-Update-Billing-Environment';
+import { ENVIRONMENT_HEADER } from '../../types/internal';
 
 export class UpdateBillingClient {
   private environment: string;
diff --git a/src/providers/supabase/UpdateEntitlementClient.ts b/src/providers/supabase/UpdateEntitlementClient.ts
new file mode 100644
index 0000000..5f910c5
--- /dev/null
+++ b/src/providers/supabase/UpdateEntitlementClient.ts
@@ -0,0 +1,81 @@
+import { RequestClient } from '../../utils/request';
+import { UpdateClientBillingOptions } from '../../types/options';
+import {
+  CheckEntitlementResponse,
+  ListEntitlementsResponse,
+} from '../../types/entitlement';
+import { ENVIRONMENT_HEADER } from '../../types/internal';
+
+export class UpdateEntitlementClient {
+  private environment: string;
+  private requestClient: RequestClient;
+
+  constructor({
+    environment,
+    requestClient,
+  }: UpdateClientBillingOptions & {
+    requestClient: RequestClient;
+  }) {
+    this.requestClient = requestClient;
+    this.environment = environment ?? 'test';
+  }
+
+  async list(): Promise<ListEntitlementsResponse> {
+    const { data, error } = await this.requestClient.request<string[]>({
+      endpoint: '/entitlements',
+      method: 'GET',
+      headers: {
+        [ENVIRONMENT_HEADER]: this.environment,
+      },
+    });
+
+    if (error) {
+      return {
+        data: {
+          entitlements: null,
+        },
+        error: {
+          message: error.message,
+        },
+      };
+    }
+
+    return {
+      data: {
+        entitlements: data,
+      },
+      error: null,
+    };
+  }
+
+  async check(entitlement: string): Promise<CheckEntitlementResponse> {
+    const { data, error } = await this.requestClient.request<{
+      has_access: boolean;
+    }>({
+      endpoint: '/entitlements/check',
+      method: 'POST',
+      body: {
+        entitlement,
+      },
+      headers: {
+        [ENVIRONMENT_HEADER]: this.environment,
+      },
+    });
+
+    if (error) {
+      return {
+        data: null,
+        error: {
+          message: error.message,
+        },
+      };
+    }
+
+    return {
+      data: {
+        hasAccess: data.has_access,
+      },
+      error: null,
+    };
+  }
+}
diff --git a/src/providers/supabase/UpdateSupabaseClient.ts b/src/providers/supabase/UpdateSupabaseClient.ts
index 08ab2f7..6a9d914 100644
--- a/src/providers/supabase/UpdateSupabaseClient.ts
+++ b/src/providers/supabase/UpdateSupabaseClient.ts
@@ -12,6 +12,7 @@ import { RequestClient } from '../../utils/request';
 import { getAll, setAll } from '../../utils';
 import { StorageClient, StorageOptions } from '../../utils/storage';
 import { UpdateSupabaseClientOptions } from './types/options';
+import { UpdateEntitlementClient } from './UpdateEntitlementClient';
 
 export class UpdateSupabaseClient<
   Database = any,
@@ -32,6 +33,7 @@ export class UpdateSupabaseClient<
   realtime: SupabaseClient['realtime'];
   billing: UpdateBillingClient;
   organization: UpdateOrganizationClient;
+  entitlements: UpdateEntitlementClient;
 
   constructor(
     protected readonly apiKey: string,
@@ -64,6 +66,10 @@ export class UpdateSupabaseClient<
       ...options?.billing,
       requestClient,
     });
+    this.entitlements = new UpdateEntitlementClient({
+      environment: options?.billing?.environment,
+      requestClient,
+    });
     this.organization = new UpdateOrganizationClient({
       requestClient,
       storageClient: this.storageClient,
diff --git a/src/types/entitlement.ts b/src/types/entitlement.ts
new file mode 100644
index 0000000..f9046a7
--- /dev/null
+++ b/src/types/entitlement.ts
@@ -0,0 +1,29 @@
+export type ListEntitlementsResponse =
+  | {
+      data: {
+        entitlements: string[];
+      };
+      error: null;
+    }
+  | {
+      data: {
+        entitlements: null;
+      };
+      error: {
+        message: string;
+      };
+    };
+
+export type CheckEntitlementResponse =
+  | {
+      data: {
+        hasAccess: boolean;
+      };
+      error: null;
+    }
+  | {
+      data: null;
+      error: {
+        message: string;
+      };
+    };
diff --git a/src/types/internal.ts b/src/types/internal.ts
new file mode 100644
index 0000000..ac9e61a
--- /dev/null
+++ b/src/types/internal.ts
@@ -0,0 +1 @@
+export const ENVIRONMENT_HEADER = 'X-Update-Environment';