diff --git a/src/app/api/v1/quotes/[id]/route.test.ts b/src/app/api/v1/quotes/[id]/route.test.ts
index 57b5d0e..f974907 100644
--- a/src/app/api/v1/quotes/[id]/route.test.ts
+++ b/src/app/api/v1/quotes/[id]/route.test.ts
@@ -2,9 +2,11 @@ import { describe, it, expect, beforeEach, vi } from "vitest";
 import { NextRequest } from "next/server";
 
 const setQuoteNotesMock = vi.fn();
+const setIsNoQuoteMock = vi.fn();
 
 vi.mock("@/lib/server/quotes-service", () => ({
   setQuoteNotes: (...args: unknown[]) => setQuoteNotesMock(...args),
+  setIsNoQuote: (...args: unknown[]) => setIsNoQuoteMock(...args),
 }));
 
 import { PATCH } from "./route";
@@ -101,3 +103,38 @@ describe("PATCH /api/v1/quotes/[id]", () => {
     expect(setQuoteNotesMock).toHaveBeenCalledWith("q-123", "");
   });
 });
+
+describe("PATCH /api/v1/quotes/[id] is_no_quote", () => {
+  beforeEach(() => {
+    setIsNoQuoteMock.mockReset();
+  });
+
+  it("accepts is_no_quote: true and calls setIsNoQuote", async () => {
+    setIsNoQuoteMock.mockResolvedValue({ id: "q-123", is_no_quote: true });
+    const res = await callPATCH({ is_no_quote: true });
+    expect(res.status).toBe(200);
+    expect(setIsNoQuoteMock).toHaveBeenCalledWith("q-123", true);
+  });
+
+  it("accepts is_no_quote: false and calls setIsNoQuote", async () => {
+    setIsNoQuoteMock.mockResolvedValue({ id: "q-123", is_no_quote: false });
+    const res = await callPATCH({ is_no_quote: false });
+    expect(res.status).toBe(200);
+    expect(setIsNoQuoteMock).toHaveBeenCalledWith("q-123", false);
+  });
+
+  it("rejects is_no_quote: \"yes\" (non-boolean)", async () => {
+    const res = await callPATCH({ is_no_quote: "yes" });
+    expect(res.status).toBe(400);
+    expect(setIsNoQuoteMock).not.toHaveBeenCalled();
+  });
+
+  it("can patch is_no_quote and quote_notes in the same call", async () => {
+    setQuoteNotesMock.mockResolvedValue({ id: "q-123", quote_notes: "Out of scope" });
+    setIsNoQuoteMock.mockResolvedValue({ id: "q-123", is_no_quote: true });
+    const res = await callPATCH({ is_no_quote: true, quote_notes: "Out of scope" });
+    expect(res.status).toBe(200);
+    expect(setIsNoQuoteMock).toHaveBeenCalledWith("q-123", true);
+    expect(setQuoteNotesMock).toHaveBeenCalledWith("q-123", "Out of scope");
+  });
+});
diff --git a/src/app/api/v1/quotes/[id]/route.ts b/src/app/api/v1/quotes/[id]/route.ts
index f26d721..ff19063 100644
--- a/src/app/api/v1/quotes/[id]/route.ts
+++ b/src/app/api/v1/quotes/[id]/route.ts
@@ -1,5 +1,5 @@
 import { NextRequest, NextResponse } from "next/server";
-import { setQuoteNotes } from "@/lib/server/quotes-service";
+import { setQuoteNotes, setIsNoQuote } from "@/lib/server/quotes-service";
 
 /**
  * PATCH /api/v1/quotes/[id]
@@ -19,11 +19,11 @@ import { setQuoteNotes } from "@/lib/server/quotes-service";
  * operator-facing and the AGENT_API_KEY is reserved for cron.
  *
  * Body (JSON):
- *   { quote_notes?: string }
+ *   { quote_notes?: string, is_no_quote?: boolean }
  *
  * Response:
  *   200 — { quote }
- *   400 — { error } (quote_notes is not a string)
+ *   400 — { error } (quote_notes is not a string, is_no_quote is not a boolean)
  *   404 — { error } (quote not found)
  *   500 — { error } (PB failure, surfaced verbatim)
  *
@@ -33,7 +33,7 @@ import { setQuoteNotes } from "@/lib/server/quotes-service";
 export const runtime = "nodejs";
 export const dynamic = "force-dynamic";
 
-const PATCHABLE_FIELDS = ["quote_notes"] as const;
+const PATCHABLE_FIELDS = ["quote_notes", "is_no_quote"] as const;
 type PatchableField = (typeof PATCHABLE_FIELDS)[number];
 
 function isPatchableField(key: string): key is PatchableField {
@@ -74,6 +74,13 @@ export async function PATCH(
     );
   }
 
+  if ("is_no_quote" in body && typeof body.is_no_quote !== "boolean") {
+    return NextResponse.json(
+      { error: "is_no_quote must be a boolean" },
+      { status: 400 },
+    );
+  }
+
   // Caller token for future audit logging. The route does NOT enforce
   // auth here — the agent-auth check is reserved for the cron endpoints.
   const callerToken = req.headers.get("authorization") ?? undefined;
@@ -82,17 +89,25 @@ export async function PATCH(
   void callerToken;
 
   try {
+    let quote: Awaited<ReturnType<typeof setQuoteNotes>> | undefined;
+
     if (typeof body.quote_notes === "string") {
-      const quote = await setQuoteNotes(quoteId, body.quote_notes);
-      return NextResponse.json({ quote });
+      quote = await setQuoteNotes(quoteId, body.quote_notes);
+    }
+    if (typeof body.is_no_quote === "boolean") {
+      quote = await setIsNoQuote(quoteId, body.is_no_quote);
     }
 
-    // No whitelisted fields present — nothing to do. Return 400 so
-    // callers don't think they updated something silently.
-    return NextResponse.json(
-      { error: "No patchable fields supplied" },
-      { status: 400 },
-    );
+    if (!quote) {
+      // No whitelisted fields present — nothing to do. Return 400 so
+      // callers don't think they updated something silently.
+      return NextResponse.json(
+        { error: "No patchable fields supplied" },
+        { status: 400 },
+      );
+    }
+
+    return NextResponse.json({ quote });
   } catch (err) {
     const message = err instanceof Error ? err.message : "Failed to update quote";
     // PB throws a 404 when the record doesn't exist; surface that
diff --git a/src/lib/server/quotes-service.ts b/src/lib/server/quotes-service.ts
index 9ca2ab2..af8c211 100644
--- a/src/lib/server/quotes-service.ts
+++ b/src/lib/server/quotes-service.ts
@@ -2793,3 +2793,15 @@ export async function setQuoteNotes(
   });
   return updated;
 }
+
+/**
+ * Set or clear the no-quote flag on a quote. Reverts to false (a real
+ * quote) when called with `false`. Stamps `updated` automatically.
+ */
+export async function setIsNoQuote(
+  quoteId: string,
+  value: boolean,
+): Promise<Quote> {
+  const pb = await getAdminPocketBase();
+  return pb.collection(QUOTES_COLLECTION).update<Quote>(quoteId, { is_no_quote: value });
+}