Fetching from `api.fiscaldata.treasury.gov` returns 525

router.get("/api/test", async () => {
    const data = await fetch(
        "https://api.fiscaldata.treasury.gov/services/api/fiscal_service/v2/accounting/od/debt_to_penny?sort=-record_date&limit=1",
        {
            headers: {
                "Content-Type": "application/json",
            },
        },
    );
    const jsonData = await data.json();
    return json(jsonData);
});

{
    "status": 500,
    "error": "Unexpected token 'e', \"error code: 525\" is not valid JSON"
}