diff --git a/apps/cli/src/services/api/with-rest-key.ts b/apps/cli/src/services/api/with-rest-key.ts
index f30cedd..f94ea1a 100644
--- a/apps/cli/src/services/api/with-rest-key.ts
+++ b/apps/cli/src/services/api/with-rest-key.ts
@@ -48,6 +48,7 @@ export async function withRestKey<T>(
     if (process.env.CLAUDEMESH_DEBUG_PROBE) {
       const probeUrls = [
         "https://claudemesh.com/api/v1/me/workspace",
+        "https://claudemesh.com/api/v1/me/ping",
         "https://claudemesh.com/api/v1/me/topics",
       ];
       for (const u of probeUrls) {
diff --git a/packages/api/src/modules/mesh/v1-router.ts b/packages/api/src/modules/mesh/v1-router.ts
index ced14cf..3656ea1 100644
--- a/packages/api/src/modules/mesh/v1-router.ts
+++ b/packages/api/src/modules/mesh/v1-router.ts
@@ -496,11 +496,11 @@ export const v1Router = new Hono<Env>()
     });
   })
 
-  // GET /v1/me/ping — sanity probe for cross-mesh route health.
-  .get("/me/ping", async (c) => {
+  // GET /v1/diagnostics-fresh-2026-05-03 — fresh path probe.
+  .get("/diagnostics-fresh-2026-05-03", async (c) => {
     const key = c.var.apiKey;
     requireCapability(key, "read");
-    return c.json({ ok: true, hasIssuer: !!key.issuedByMemberId });
+    return c.json({ ok: true, ts: Date.now() });
   })
 
   // GET /v1/me/topics — cross-mesh topic list for the caller's user.