diff --git a/src/app/api/mcp/route.test.ts b/src/app/api/mcp/route.test.ts
index 79e6ef1..7a7c7bb 100644
--- a/src/app/api/mcp/route.test.ts
+++ b/src/app/api/mcp/route.test.ts
@@ -229,6 +229,9 @@ const toolNames = body.result.tools.map((t: { name: string }) => t.name);
       // Hermes unblock (PR 1, 2026-08-21):
       //   set_quote writes the orders.quote relation for an existing order
       "orders.set_quote",
+      // Backlog sweep for the historical orders the intake matcher
+      // never saw (2026-08-30).
+      "orders.quote_match_sweep",
       "orders.add_note",
       "collection_pool.list",
       "order_items.update_status",
diff --git a/src/app/api/mcp/route.ts b/src/app/api/mcp/route.ts
index 94e6f71..c560bad 100644
--- a/src/app/api/mcp/route.ts
+++ b/src/app/api/mcp/route.ts
@@ -870,6 +870,31 @@ const tools = [
       },
     },
   },
+  {
+    name: "orders.quote_match_sweep",
+    description:
+      "Run quote auto-detection over orders that have never been attempted. Mirrors the REST " +
+      "POST /api/v1/orders/quote-match/sweep endpoint.\n\n" +
+      "Why this exists: orders created from now on are matched automatically at intake. This is the " +
+      "catch-up path for the historical backlog and for orders whose line items changed after " +
+      "creation.\n\n" +
+      "Writes ONLY the soft suggestion (`potential_quote` + `potential_quote_confidence`). It never " +
+      "writes the hard `orders.quote` link — promoting a suggestion is a deliberate human action via " +
+      "`orders.set_quote`.\n\n" +
+      "Processes one batch per call. Re-run until the returned `remaining` is 0.\n\n" +
+      "Returns `{ processed, suggested, noMatch, failed, remaining, ageGaps }`. `ageGaps` buckets the " +
+      "quote-to-order age in days for every match found (d0_30, d31_60, d61_90, d91_180, d181_365, " +
+      "d365_plus, total) — use it to check whether the 90-day fuzzy search window is set correctly.",
+    inputSchema: {
+      type: "object",
+      properties: {
+        limit: {
+          type: "number",
+          description: "Orders to process in this batch. 1..500, default 100.",
+        },
+      },
+    },
+  },
   {
     name: "orders.add_note",
     description:
@@ -3922,6 +3947,44 @@ export async function POST(req: NextRequest) {
         });
       }
 
+      if (toolName === "orders.quote_match_sweep") {
+        // Forward to the REST route — keeps the surface in lock-step
+        // with the agent-auth route and surfaces the structured 4xx/5xx
+        // data without re-implementing the error envelope here.
+        const limit = typeof args.limit === "number" ? args.limit : undefined;
+        const upstreamRes = await fetch(
+          `${upstreamOrigin(req)}/api/v1/orders/quote-match/sweep`,
+          {
+            method: "POST",
+            headers: {
+              "Content-Type": "application/json",
+              authorization: `Bearer ${process.env.AGENT_API_KEY ?? ""}`,
+            },
+            body: JSON.stringify(limit === undefined ? {} : { limit }),
+          },
+        );
+        const data = await upstreamRes.json().catch(() => ({}));
+        if (!upstreamRes.ok) {
+          return NextResponse.json(
+            {
+              jsonrpc: "2.0",
+              id: body.id ?? null,
+              error: {
+                code: -32010,
+                message: `orders.quote_match_sweep upstream ${upstreamRes.status}: ${data?.error ?? "unknown"}`,
+                data,
+              },
+            },
+            { status: 200 },
+          );
+        }
+        return NextResponse.json({
+          jsonrpc: "2.0",
+          id: body.id ?? null,
+          result: { content: [{ type: "text", text: JSON.stringify(data) }] },
+        });
+      }
+
       if (toolName === "orders.add_note") {
         const orderId = String(args.id || "").trim();
         if (!orderId) throw new Error("Missing id for orders.add_note.");