diff --git a/src/servers/sidecar/wallet/index.ts b/src/servers/sidecar/wallet/index.ts
index 471afa36..5fd3f3d0 100644
--- a/src/servers/sidecar/wallet/index.ts
+++ b/src/servers/sidecar/wallet/index.ts
@@ -94,6 +94,12 @@ const server = Bun.serve({
   hostname: '127.0.0.1',
   // Wallet payloads are small — PSBTs and invoices, never file uploads. A tight cap is free hardening.
   maxRequestBodySize: 1 * 1024 * 1024,
+  // Bun's default is 10s, which is SHORTER than the Esplora client's own 20s per-request timeout. That
+  // inversion is why a slow or unreachable upstream showed up as a wallet with no data at all rather than
+  // as an error: Bun killed the response before the scan could either finish or report why it hadn't.
+  // A gap-limit scan is many sequential rounds, so the ceiling has to sit above the whole walk, not one
+  // request. Bun caps this at 255s; every other sidecar already uses that.
+  idleTimeout: 255,
   async fetch(req) {
     const url = new URL(req.url);