Envelope_OnchainCatalogData_(Envelope[OnchainCatalogData])

{
    "data": {
        "count": 0,
        "metrics": [
            {
                "metric": "string",
                "full_name": "string",
                "description": "string",
                "category": "string",
                "subcategory": "string",
                "unit": "string",
                "data_type": "string"
            }
        ]
    },
    "meta": {
        "endpoint": "/api/v1/fred/us/cpi",
        "data_time": "2026-04-16T14:30:00Z",
        "response_time": "2026-04-16T14:30:12Z",
        "provider": "Sugra API v1.0.1",
        "source": "string",
        "fallback_used": true,
        "fallback_chain": [
            "string"
        ],
        "cached": true
    }
}