diff --git a/manifest.json b/manifest.json
index a1418d210..d79549a71 100644
--- a/manifest.json
+++ b/manifest.json
@@ -306,6 +306,8 @@
       ]
     },
     "cursor": {
+      "disabled": true,
+      "disabled_reason": "Cursor CLI uses a proprietary protocol (ConnectRPC) and validates API keys against Cursor's own servers. Cannot route through OpenRouter. Re-enable when Cursor adds BYOK/custom endpoint support for agent mode.",
       "name": "Cursor CLI",
       "description": "Cursor's terminal-based AI coding agent — autonomous coding with plan, agent, and ask modes",
       "url": "https://cursor.com/cli",
diff --git a/packages/cli/src/manifest.ts b/packages/cli/src/manifest.ts
index 4a0ffeb52..bda9e6ff6 100644
--- a/packages/cli/src/manifest.ts
+++ b/packages/cli/src/manifest.ts
@@ -43,6 +43,8 @@ export interface AgentDef {
   category?: string;
   tagline?: string;
   tags?: string[];
+  disabled?: boolean;
+  disabled_reason?: string;
 }
 
 export interface CloudDef {
@@ -280,7 +282,9 @@ export async function loadManifest(forceRefresh = false): Promise<Manifest> {
 }
 
 export function agentKeys(m: Manifest): string[] {
-  return Object.keys(m.agents).sort((a, b) => (m.agents[b].github_stars ?? 0) - (m.agents[a].github_stars ?? 0));
+  return Object.keys(m.agents)
+    .filter((k) => !m.agents[k].disabled)
+    .sort((a, b) => (m.agents[b].github_stars ?? 0) - (m.agents[a].github_stars ?? 0));
 }
 
 export function cloudKeys(m: Manifest): string[] {