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ETF Holdings – Spot Bitcoin & Ethereum ETF Data
x402
ETF Holdings – Spot Bitcoin & Ethereum ETF Data is a paid API for AI agents from payai.agentstools.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Returns latest per-fund holdings (coin units, market value, shares outstanding), total AUM, and largest-fund AUM share for spot BTC or ETH ETFs in a given region.
Price / call$0.01
Success—
StatusUnknown
How this service works
Latest holdings for spot Bitcoin or Ethereum ETFs from issuer disclosures: per-fund coin units (or shares), market value and shares outstanding, plus total AUM across funds and the largest fund's AUM share. One normalized call.
Output
A normalized response containing per-fund data (coin units or shares held, market value, shares outstanding) for each spot BTC or ETH ETF in the requested region, along with aggregate total AUM across all funds and the AUM share of the largest single fund.
Example use cases
Largest Bitcoin ETF dominance check
“Which Bitcoin ETF has the biggest AUM right now, and what share of the total US spot BTC ETF market does it control?”
Ethereum ETF aggregate AUM snapshot
“What's the total AUM across all US spot Ethereum ETFs today, and how are the holdings broken down per fund in terms of coin units and market value?”
Compare spot BTC ETF fund sizes
“Can you pull the latest issuer disclosures for US spot Bitcoin ETFs and compare each fund's shares outstanding and market value so I can see how they stack up against each other?”
Technical details
Endpoint
GEThttps://payai.agentstools.dev/etf/holdingsWhen to prefer
Use this endpoint when you need a single normalized call to get cross-fund ETF holdings data for spot Bitcoin or Ethereum ETFs, including per-fund breakdown and aggregate AUM metrics, sourced directly from issuer disclosures. Prefer it over scraping individual ETF issuer sites or using general financial data APIs that don't specialize in crypto ETF holdings.
Side effects
- Missing required 'asset' or 'region' query parameter returns a 400 validation error
- Unsupported asset/region combination (e.g. 'eth' + 'hk') may return empty data or a scaffold placeholder
- Stale issuer disclosures may mean holdings data lags real-time market values
- Network or upstream data source outages may return 5xx errors
- Payment failure (x402) if USDC balance is insufficient
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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