diff --git a/supabase/functions/meta-whatsapp-webhook/index.ts b/supabase/functions/meta-whatsapp-webhook/index.ts
index d3cda8d..3450a58 100644
--- a/supabase/functions/meta-whatsapp-webhook/index.ts
+++ b/supabase/functions/meta-whatsapp-webhook/index.ts
@@ -234,6 +234,7 @@ async function generateStripeCheckoutUrl(userId: string): Promise<string> {
             method: "POST",
             headers: {
                 "Content-Type": "application/json",
+                "apikey": SUPABASE_SERVICE_ROLE_KEY,
                 "Authorization": `Bearer ${SUPABASE_SERVICE_ROLE_KEY}`,
             },
             body: JSON.stringify({ user_id: userId, plan: "mensal" })