macro us derived

{
  "input": {
    "type": "http",
    "method": "GET",
    "queryParams": {
      "series": "gdp_change,sofr"
    }
  },
  "output": {
    "type": "json",
    "errors": {
      "400": {
        "example": {
          "error": "invalid request"
        },
        "description": "Invalid or missing parameter(s). Returned before the payment gate on paid requests, so a malformed call is never charged. JSON body: { error: <what is wrong and how to fix it> } plus usage hints."
      },
      "402": {
        "description": "Payment required — x402 v2 challenge; the accepts array lists scheme, network, and amount. Retry the same request with a PAYMENT-SIGNATURE (v2) or X-PAYMENT (v1) header. Verification is free."
      },
      "500": {
        "example": {
          "error": "upstream_failed"
        },
        "description": "Unexpected server error. If a payment settled without a usable result, contact info@theaslangroupllc.com with the settlement tx hash for a re-run or credit."
      }
    },
    "example": {
      "series": [
        {
          "key": "gdp_change",
          "name": "Real GDP — Percent Change (Annual Rate)",
          "as_of": "2026-06-25T12:32:41.000Z",
          "chain": "eip155:8453",
          "units": "percent, annualised rate",
          "value": 2.1,
          "contract": "0xe0eda54fC1362C0d7d0ff855E4fCEA79916Fe094",
          "round_id": "36893488147419103237"
        }
      ],
      "source": {
        "license": "public domain (US federal government work)",
        "transport": "Chainlink data feeds",
        "verifiable": true
      },
      "deterministic": true
    }
  }
}