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/api/etf/funds
GETPartial

ETF fund list

ETF fund list (ticker, issuer, AUM, fee, ...)

GET/api/etf/funds
Partial coverage. Flows and holdings update daily. `fee_pct`, `volume_usd`, `mkt_share_pct` and `cum_inflow_official` come from a source that stopped publishing on 2026-10-08 and keep their last value until a replacement is live; do not treat those four fields as current. `latest_premium_pct` is `null` for the same reason. The `frozen_fields` object in the response names these fields with the date each value refers to.

Request

Query parameters

NameTypeRequiredDefaultAllowed valuesDescription
assetstringOptionalBTCBTC, ETH, SOL, HYPEUnderlying asset. Any other value returns 400 `INVALID_PARAM`. Example: BTC

Example request

curl -s "https://www.coinboss.com/api/etf/funds?asset=BTC"

Response fields

The field table is generated from real responses, so it lists exactly what the endpoint returns. Paths use a[] for array items and {*} for objects keyed by a dynamic name such as a coin or an exchange.

FieldTypeUnitDescription
successboolean—true when the request succeeded. On failure the body is `{ success: false, code, error, request_id }`.
assetstring—Asset symbol.
unitstring—Unit of the values in this object.
countnumber—Number of items.
fundsarray—All spot ETF funds of the asset, sorted by `latest_aum` descending.
funds[]object—One fund with its latest flow, AUM and snapshot attributes.
funds[].tickerstring—Fund ticker.
funds[].issuerstring—Fund issuer.
funds[].latest_datestring—Most recent trading day (YYYY-MM-DD) with flow data for the fund; null when the fund has no rows.
funds[].latest_flownumbermillion USDNet flow of the fund on `latest_date`; negative = net outflow.
funds[].sum_7dnumber—7-day sum.
funds[].cum_totalnumber—Cumulative total.
funds[].latest_aumnumbermillion USDAssets under management of the fund on `latest_date`; null when not available for that day.
funds[].latest_premium_pctnumber|null%Premium (+) or discount (−) of the fund's market price to its net asset value on `latest_date`; null when not available for that day.
funds[].sourcestring—Where the value comes from.
funds[].fee_pctnumber%Annual management fee of the fund in percent (0.25 = 0.25 % per year); last known value, see `frozen_fields` for its date.
funds[].volume_usdnumberUSDVolume in USD notional.
funds[].mkt_share_pctnumber%Fund AUM as a percentage of the underlying coin's total market cap (not its share among ETFs); last known value, see `frozen_fields`.
funds[].cum_inflow_officialnumbermillion USDCumulative net inflow since launch as published by a third-party source; last known value, see `frozen_fields` for its date.
funds[].etf_share_pctnumber%`latest_aum` of the fund as a percentage of the summed `latest_aum` of all funds of the same asset.
frozen_fieldsobject—Fields whose source stopped updating; they carry the last known value and must not be read as current. `null` when nothing is frozen.
frozen_fields.fieldsarray—Names of the frozen fields.
frozen_fields.fields[]string—Field name.
frozen_fields.as_ofstring—Date of the last update of the frozen fields (YYYY-MM-DD).
frozen_fields.latest_datestring—Newest date of the fields that still update (YYYY-MM-DD).
frozen_fields.detailarray—Detail.
frozen_fields.detail[]object—Detail.
frozen_fields.detail[].fieldstring—Frozen field name.
frozen_fields.detail[].as_ofstring—Date of the last update of this field (YYYY-MM-DD).
frozen_fields.detail[].servedstring—What the API returns for the field: `last_known_value` or `null`.
frozen_fields.by_tickerobject—Per fund: date of the last update of each frozen field. dynamic keys: IBIT,FBTC,GBTC,BTC,BITB,ARKB
frozen_fields.by_ticker.{*}object—Frozen fields of one fund, keyed by field name.
frozen_fields.by_ticker.{*}.fee_pctstring%Date of the last update of `fee_pct` (YYYY-MM-DD).
frozen_fields.by_ticker.{*}.volume_usdstringUSDVolume in USD notional.
frozen_fields.by_ticker.{*}.mkt_share_pctstring%Date of the last update of `mkt_share_pct` (YYYY-MM-DD).
frozen_fields.by_ticker.{*}.cum_inflow_officialstring—Date of the last update of `cum_inflow_official` (YYYY-MM-DD).
frozen_fields.by_ticker.{*}.latest_premium_pctstring%Date of the last update of `latest_premium_pct` (YYYY-MM-DD).
frozen_fields.notestring—Note.

Generated 2026-11-11 23:00 UTC from 1 real responses.

Example response

/api/etf/funds?asset=BTC · Real response captured 2026-11-13 03:58:19 UTC. Long arrays and maps are shortened for display: funds had 13 items; frozen_fields.detail had 5 items; frozen_fields.by_ticker had 13 items.

  • {
    • "success": true,
    • "asset": "BTC",
    • "unit": "million_usd",
    • "count": 13,
    • "funds": [
      • { … 14 },
      • { … 14 }
      ],
    • "frozen_fields": {
      • "fields": [ … 5 ],
      • "as_of": "2026-10-08",
      • "latest_date": "2026-11-12",
      • "detail": [ … 2 ],
      • "by_ticker": { … 2 },
      • "note": "fields 所列字段的数据源自 as_of 之后未再更新：served=last_known_value 的字段返回的是 as_of 当日的最后已知值（不是 latest_date 的值）；served=null 的字段在 latest_date 无数据、返回 null。其余字段（latest_flow/sum_7d…"
      }
    }

Details

Authentication
None. Public endpoint.
Rate limit
1200 requests per minute per IP
Server cache
5m
Edge micro-cache
10s
Update frequency
hourly (minute 15); source publishes once per US trading day
Window
latest snapshot per fund (flows summed over 7 trading days and since listing)
Data sources
Per-fund list of US spot crypto ETFs: flows from a public ETF flow tracker, AUM from a public market-data site.
Exchange coverage
All funds of the selected asset (BTC, ETH, SOL, HYPE).
Sorting
latest AUM descending
Units
million USD (flows, AUM); percent (premium, fee, shares)
Method
cum_total = sum of daily flows; etf_share_pct = fund AUM / sum of AUM of all funds of the same asset x 100.
Timestamps
Unix epoch milliseconds (UTC) unless the field description says otherwise
Response format
json
Stability
Stable

Live status

PartialChecked 2026-11-13 03:58:19 UTCHTTP 2001 msSchema matchesNewest data point 28h old

Flows and holdings update daily. `fee_pct`, `volume_usd`, `mkt_share_pct` and `cum_inflow_official` come from a source that stopped publishing on 2026-10-08 and keep their last value until a replacement is live; do not treat those four fields as current. `latest_premium_pct` is `null` for the same reason. The `frozen_fields` object in the response names these fields with the date each value refers to.

Availability, last 30 days

100% of 410 checks passed

Errors

Failed calls share one shape on every endpoint. The full list is on the errors page. Errors and rate limits →

CodeHTTPMeaningWhat to do
INVALID_PARAM400A required parameter is missing or a value is not accepted. `param` names the parameter when it is known.Do not retry unchanged; fix the request.
UNAUTHORIZED401The `CB-API-KEY` header was sent but the key is unknown or revoked. Public data needs no key — drop the header or use a valid key.Do not retry unchanged.
FORBIDDEN403The route is not part of the public API (internal or account-only).Do not retry.
NOT_FOUND404Unknown route, or the requested coin / exchange / fund does not exist.Do not retry; check the path and identifiers against the catalog.
RATE_LIMITED429More requests than the per-minute limit. `Retry-After` gives the seconds to wait.Wait for `Retry-After`, then retry with backoff.
INTERNAL500Unexpected server error. The message is generic by design; quote `request_id` when reporting it.Retry once after a few seconds; report it with the request id if it persists.
UPSTREAM_FAILED503The data source behind this endpoint did not answer in time. No stale or substitute numbers are returned in its place.Retry with backoff; check the status page.
UNAVAILABLE501 / 503The dataset is temporarily not ready (cache warming) or the endpoint has no lawful public source yet.Retry later; the catalog marks endpoints that are unavailable by design.
REQUEST_FAILED200Some older endpoints answer HTTP 200 with `success: false`. Always check `success`, not only the HTTP status.Depends on the message; treat as a failed request.

Try it

GET/api/etf/fundsPartial
Parameters

string · default BTC — Underlying asset. Any other value returns 400 `INVALID_PARAM`.

Request URLhttps://www.coinboss.com/api/etf/funds?asset=BTC
Choose an endpoint and press “Send request”. The response, headers and timing will appear here.