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Glassnode US Spot ETF Balances (All)
x402
Glassnode US Spot ETF Balances (All) is a paid API for AI agents from x402.glassnode.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).
Returns the most recent holdings of major U.S.-listed spot Bitcoin and Ethereum ETFs (e.g. IBIT, GBTC, FBTC, ETHA) by issuer, denominated in native or USD, at daily/weekly/monthly resolution.
Price / call$0.05
Success—
StatusUnknown
How this service works
US Spot ETF Balances — The most recent holdings of the leading U.S.-listed spot Crypto ETFs, typically reflecting balances at the end of the previous trading day (T+1). Covers major Bitcoin ETFs (e.g. IBIT, GBTC, FBTC, ARKB, BITB) and Ethereum ETFs (e.g. ETHA, ETHE, FETH, ETHV, QETH) from issuers such as BlackRock, Grayscale, Fidelity, Bitwise, and VanEck. Data by Glassnode.
Output
An array of timestamped objects, each containing an object field 'o' with per-ETF balance data (amounts held by each issuer such as BlackRock, Grayscale, Fidelity, Bitwise, VanEck) for the queried asset, denominated in native units or USD, at the requested time resolution.
Example use cases
Compare Ethereum ETF holdings by issuer
“Can you pull the latest US spot Ethereum ETF balances from Glassnode and compare how much ETH BlackRock's ETHA, Grayscale's ETHE, and Fidelity's FETH are each holding right now?”
Track weekly Bitcoin ETF balance changes
“Fetch weekly BTC ETF balance data from Glassnode for all major issuers — I want to see how IBIT, GBTC, ARKB, and FBTC holdings have been trending over the past few months.”
Monitor total institutional Bitcoin ETF exposure
“Give me the total BTC held across all US spot Bitcoin ETFs in USD using Glassnode data — I'm trying to gauge overall institutional exposure and see which issuers like BlackRock and Fidelity are dominating the flows.”
Technical details
Endpoint
GEThttps://x402.glassnode.com/v1/metrics/institutions/us_spot_etf_balances_allWhen to prefer
Use this endpoint when you need authoritative, Glassnode-sourced institutional ETF balance data for US-listed spot Bitcoin or Ethereum ETFs across all major issuers in one call. Prefer this over generic market data APIs when you specifically need fund-level holdings broken down by issuer/ticker with on-chain data provenance.
Side effects
- Missing required 'a' (asset) query parameter returns a 400/422 error
- Requesting an asset not covered by US spot ETFs (e.g. DOGE, SOL) may return empty or null balance data
- Invalid enum values for 'c', 'f', or 'i' parameters result in validation errors
- Payment not processed (402 Payment Required) if x402 USDC payment of $0.05 is not attached
- Rate limiting or upstream Glassnode data unavailability may cause 5xx errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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