diff --git a/packages/subscription-client/src/index.ts b/packages/subscription-client/src/index.ts
index 80351353..461547ce 100644
--- a/packages/subscription-client/src/index.ts
+++ b/packages/subscription-client/src/index.ts
@@ -50,6 +50,7 @@ export function createSubscriptionClient(
     const token = opts.getAccessToken();
     const headers = new Headers(init?.headers);
     headers.set("Authorization", `Bearer ${token}`);
+    headers.set("X-Product-Id", opts.productId);
     if (!headers.has("Content-Type") && init?.body !== undefined) {
       headers.set("Content-Type", "application/json");
     }