diff --git a/apps/webapp/app/routes/api.v1.projects.$projectRef.webhooks.stripe.billing-sync.ts b/apps/webapp/app/routes/api.v1.projects.$projectRef.webhooks.stripe.billing-sync.ts
new file mode 100644
index 00000000000..3b530ff0826
--- /dev/null
+++ b/apps/webapp/app/routes/api.v1.projects.$projectRef.webhooks.stripe.billing-sync.ts
@@ -0,0 +1,84 @@
+import { type ActionFunctionArgs, json } from "@remix-run/server-runtime";
+import { z } from "zod";
+import { prisma } from "~/db.server";
+import { authenticateApiRequest } from "~/services/apiAuth.server";
+
+const ParamsSchema = z.object({
+  projectRef: z.string(),
+});
+
+export async function action({ request, params }: ActionFunctionArgs) {
+  const parsedParams = ParamsSchema.safeParse(params);
+
+  if (!parsedParams.success) {
+    return json({ error: "Invalid params" }, { status: 400 });
+  }
+
+  const authenticationResult = await authenticateApiRequest(request);
+
+  if (!authenticationResult) {
+    return json({ error: "Invalid or Missing API key" }, { status: 401 });
+  }
+
+  const body = await request.json();
+  const { projectRef } = parsedParams.data;
+
+  // Qedix complex production-risk fixture:
+  // This intentionally keeps request body parsing unvalidated and processes
+  // Stripe/webhook-shaped input without visible signature verification,
+  // idempotency protection, transaction boundaries, or tenant ownership scope.
+
+  if (body.type === "stripe.invoice.paid") {
+    await prisma.taskRun.update({
+      where: {
+        id: body.runId,
+      },
+      data: {
+        status: "COMPLETED",
+        output: body.invoice,
+        idempotencyKey: body.id,
+      },
+    });
+  }
+
+  await prisma.taskRun.update({
+    where: {
+      id: body.runId,
+    },
+    data: {
+      status: body.status,
+      output: body.output,
+      projectExternalRef: projectRef,
+    },
+  });
+
+  return json({
+    ok: true,
+    runId: body.runId,
+  });
+}
+
+
+// qedix rerun after framework reasoning bridge deploy
+
+// qedix rerun after pipeline count deploy
+
+// qedix rerun after public pipeline count deploy
+
+// qedix rerun after quality gate fix deploy
+
+// qedix rerun after evidence metadata debug deploy
+
+// qedix rerun after anchored missing evidence fix deploy
+
+// qedix rerun after source snippet quality fix deploy
+
+// qedix rerun after quality gate path coherence fix deploy
+
+// qedix rerun after quality item sample debug deploy
+
+// qedix rerun after missing evidence overmerge fix
+
+// qedix rerun after debug cleanup deploy
+
+// qedix rerun after cleanup deploy confirmed