Cumulative all-time net flow plus issuer-level breakdown for the asset.

The headline AUM number — sum of every signed daily flow for the asset since ETF inception. Coinglass calls this 'Total Net Inflow' on `/bitcoin-etf`; it's a lower bound on true AUM (it ignores price appreciation of held coins). Paired with the per-issuer cumulative breakdown so you can see who's holding what.

Path parameters

Segments of the URL path, validated server-side.

Query parameters

This endpoint takes no query parameters.

Response shape

Always wrapped in the standard envelope. Nullable fields are explicitly marked — treat missing numeric data as a real data-source gap, not as an error.

// Wrapped in the standard envelope:
// {
//   data: /* shape below */,
//   meta?: { total?: number; limit?: number; offset?: number; ... }
// }

{
  asset: "BTC" | "ETH";
  cumulativeUsdM: number;
  issuers: Array<{ ticker: string; cumulativeUsdM: number; share: number }>;
}

Example

Copy the curl, replace YOUR_KEY with a real key from your dashboard, and run.

curl -sS "http://localhost:3000/api/v1/etf/btc/aum" \
  -H "Authorization: Bearer cg_live_YOUR_KEY"

{
  "data": {
    "asset": "BTC",
    "cumulativeUsdM": 43210.55,
    "issuers": [
      { "ticker": "IBIT", "cumulativeUsdM": 24100.0, "share": 0.56 },
      { "ticker": "FBTC", "cumulativeUsdM": 11200.0, "share": 0.26 },
      { "ticker": "GBTC", "cumulativeUsdM": -18000.0, "share": 0.19 }
    ]
  },
  "meta": { "total": 3, "asset": "BTC" }
}

Notes

• AUM is a flow-based proxy. For a price-adjusted figure combine with a BTC/ETH price feed client-side.