f1owETF Flows
Daily spot-ETF net flows for BTC, ETH, SOL and XRP — the latest day, the per-fund breakdown, and the trailing trend it has to be read against.
What it does
Recent daily spot-ETF net flows (USD) for an underlying asset (BTC, ETH, SOL, XRP; defaults to BTC): latest day total, per-fund breakdown, and the trailing daily trend. Positive means net inflows. Flows settle behind spot and skip weekends, so the latest row is routinely a day or more old — its age is reported next to the date, and the price it carries is the price on THAT date, not spot. 'symbol' is accepted as an alias for 'asset'.
Parameters
| Name | Type | Description |
|---|---|---|
assetquery | string | Underlying asset symbol, e.g. "BTC" or "ETH". Defaults to BTC. |
symbolquery | string | Alias for 'asset'. |
Call it
One API key works for MCP, REST and WebSocket; each call uses one unit. Agents without an account can pay per call with x402.
curl "https://mcp.f1ow.com/v1/catalysts/etf-flows?asset=BTC" \
-H "Authorization: Bearer $F1OW_API_KEY"{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/call",
"params": {
"name": "catalysts_etf_flows",
"arguments": {
"asset": "BTC"
}
}
}const res = await fetch("https://mcp.f1ow.com/v1/catalysts/etf-flows?asset=BTC", {
headers: { Authorization: `Bearer ${process.env.F1OW_API_KEY}` },
});
const data = await res.json(); // the tool's result as JSON, typed in the OpenAPI spec
console.log(data);import os, requests
res = requests.get(
"https://mcp.f1ow.com/v1/catalysts/etf-flows?asset=BTC",
headers={"Authorization": f"Bearer {os.environ['F1OW_API_KEY']}"},
)
data = res.json() # the tool's result as JSON, typed in the OpenAPI spec
print(data)// wss://mcp.f1ow.com/v1/ws — subprotocol "jsonrpc-2.0", Authorization: Bearer <key>
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/call",
"params": {
"name": "catalysts_etf_flows",
"arguments": {
"asset": "BTC"
}
}
}
// Or push a fresh result whenever it changes (minimum interval 15 s)
{
"jsonrpc": "2.0",
"id": 2,
"method": "subscriptions/subscribe",
"params": {
"name": "catalysts_etf_flows",
"arguments": {
"asset": "BTC"
},
"intervalSeconds": 60
}
}# No account: the first call answers 402 with a PAYMENT-REQUIRED challenge;
# an x402 client pays it in USDC on Base and retries.
curl "https://mcp.f1ow.com/x402/v1/catalysts/etf-flows?asset=BTC"Sample response
A real response captured 2026-11-13. Interactive is the tool's MCP App rendering it, as Claude, ChatGPT and other MCP Apps hosts show it; here it is read-only. JSON is what REST and WebSocket return, and the structuredContent of an MCP call (trimmed for length), with generatedAt for freshness. Text is the report an MCP client hands to a model.
BTC ETF flows — latest 2026-11-12 (32.1h old)
net -47.7M | price $73980
recent daily (newest first): -47.7M, -299.8M, -95.0M, -201.0M, -411.9M, -430.2M, +74.6M
top funds: BITB -26.4M, ARKB -18.5M, HODL -6.1M, MSBT +3.3M, IBIT +0.0M{
"asset": "BTC",
"days": [
{
"byTicker": [
{
"flowUsd": 0,
"ticker": "IBIT"
},
{
"flowUsd": 0,
"ticker": "FBTC"
},
{
"flowUsd": -26400000,
"ticker": "BITB"
},
{
"flowUsd": -18500000,
"ticker": "ARKB"
},
{
"flowUsd": 0,
"ticker": "BTCO"
},
{
"flowUsd": 0,
"ticker": "EZBC"
},
"… 6 more"
],
"date": "2026-11-12",
"dateMs": 1794441600000,
"netFlowUsd": -47700000,
"priceUsd": 73979.9
},
{
"byTicker": [
{
"flowUsd": -269700000,
"ticker": "IBIT"
},
{
"flowUsd": 0,
"ticker": "FBTC"
},
{
"flowUsd": 0,
"ticker": "BITB"
},
{
"flowUsd": 0,
"ticker": "ARKB"
},
{
"flowUsd": 0,
"ticker": "BTCO"
},
{
"flowUsd": 0,
"ticker": "EZBC"
},
"… 6 more"
],
"date": "2026-11-11",
"dateMs": 1794355200000,
"netFlowUsd": -299800000,
"priceUsd": 73762.9
},
{
"byTicker": [
{
"flowUsd": -78200000,
"ticker": "IBIT"
},
{
"flowUsd": -36800000,
"ticker": "FBTC"
},
{
"flowUsd": 0,
"ticker": "BITB"
},
{
"flowUsd": 0,
"ticker": "ARKB"
},
{
"flowUsd": 0,
"ticker": "BTCO"
},
{
"flowUsd": 0,
"ticker": "EZBC"
},
"… 6 more"
],
"date": "2026-11-10",
"dateMs": 1794268800000,
"netFlowUsd": -95000000,
"priceUsd": 75327.1
},
{
"byTicker": [
{
"flowUsd": -213200000,
"ticker": "IBIT"
},
{
"flowUsd": 0,
"ticker": "FBTC"
},
{
"flowUsd": 0,
"ticker": "BITB"
},
{
"flowUsd": -9900000,
"ticker": "ARKB"
},
{
"flowUsd": 0,
"ticker": "BTCO"
},
{
"flowUsd": 0,
"ticker": "EZBC"
},
"… 6 more"
],
"date": "2026-11-09",
"dateMs": 1794182400000,
"netFlowUsd": -201000000,
"priceUsd": 74823.4
},
{
"byTicker": [
{
"flowUsd": -403000000,
"ticker": "IBIT"
},
{
"flowUsd": 42800000,
"ticker": "FBTC"
},
{
"flowUsd": -20500000,
"ticker": "BITB"
},
{
"flowUsd": -20100000,
"ticker": "ARKB"
},
{
"flowUsd": 0,
"ticker": "BTCO"
},
{
"flowUsd": 0,
"ticker": "EZBC"
},
"… 6 more"
],
"date": "2026-11-06",
"dateMs": 1793923200000,
"netFlowUsd": -411900000,
"priceUsd": 76050
},
{
"byTicker": [
{
"flowUsd": -105000000,
"ticker": "IBIT"
},
{
"flowUsd": -199900000,
"ticker": "FBTC"
},
{
"flowUsd": 0,
"ticker": "BITB"
},
{
"flowUsd": -18900000,
"ticker": "ARKB"
},
{
"flowUsd": 0,
"ticker": "BTCO"
},
{
"flowUsd": -32900000,
"ticker": "EZBC"
},
"… 6 more"
],
"date": "2026-11-05",
"dateMs": 1793836800000,
"netFlowUsd": -430200000,
"priceUsd": 80466.4
},
"… 24 more"
],
"generatedAt": "2026-11-12T00:00:00.0000000+00:00"
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