diff --git a/services/mcp-server/src/lib/jarvis-client.ts b/services/mcp-server/src/lib/jarvis-client.ts
index 51fbb84a..5f9cbe5e 100644
--- a/services/mcp-server/src/lib/jarvis-client.ts
+++ b/services/mcp-server/src/lib/jarvis-client.ts
@@ -194,8 +194,9 @@ export function jarvisMarketplaceCertify(
   decision: { decision: 'approved' | 'rejected'; notes?: string },
   opts: JarvisClientOptions
 ): Promise<unknown> {
+  const action = decision.decision === 'approved' ? 'approve' : 'reject';
   return jarvisFetch(
-    `/marketplace/admin/${listingId}/approve`,
+    `/marketplace/admin/${listingId}/${action}`,
     { method: 'POST', body: JSON.stringify(decision) },
     opts
   );