Data window and freshness

• 30 days. Every key reads the last 30 days of history; windowDays in the response says so. Older data is not served through the API or MCP — the long-range charts are on cryptoetf.today.

• T+1. A trading day becomes available the next morning (UTC), before the US open. The newest day can be revised once later that day. SUI funds arrive a day later.

• Prices come from exchange tickers and are cached for 60 seconds; a response can be up to five minutes old — check updatedAt in /v1/prices.

• Per fund. /v1/flows/{asset}/funds breaks each trading day down by fund, with the same 30-day window. A fund appears from its first trading day; netFlowUsdM is null while there is no figure for it that day.

• Net assets. /v1/funds gives each fund’s current net assets and coins held: one snapshot, not a history. Fidelity, Grayscale, Franklin Templeton, Canary and WisdomTree do not publish holdings in coins, so coinsHeld is null for their funds.

Charts with the full history: Flows dashboard · Funds · CEFI methodology.