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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 api.agentstools.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Returns latest per-fund holdings (coin units, market value, shares outstanding) and aggregate AUM stats for spot Bitcoin or Ethereum ETFs from issuer disclosures, for US or HK markets.
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
Returns a normalized JSON object with per-fund data (coin units or shares held, market value, shares outstanding) sourced from issuer disclosures, plus aggregate metrics: total AUM across all funds in the requested asset/region, and the AUM share held by the largest single fund.
Example use cases
Bitcoin ETF market concentration check
“What does the US spot Bitcoin ETF landscape look like right now — which fund is the biggest and what share of total AUM does it hold?”
Ethereum ETF institutional flow tracking
“Pull the latest holdings for all US spot Ethereum ETFs so I can see total AUM, shares outstanding per fund, and the market value of their ETH positions.”
Crypto ETF research report data
“I'm writing a report on crypto ETF adoption — can you get me the current BTC ETF holdings breakdown for US-listed funds, including coin units and market values for each issuer?”
Technical details
Endpoint
GEThttps://api.agentstools.dev/etf/holdingsWhen to prefer
Use this endpoint when you need a single normalized call that aggregates spot crypto ETF holdings across all major issuers for a given asset and region, rather than scraping individual fund disclosures. Ideal for agents that need AUM concentration metrics, per-fund coin unit counts, and market values in one structured response without building custom ETF data pipelines.
Side effects
- Invalid asset enum value (not 'btc' or 'eth') returns a 422 validation error
- Invalid region enum value (not 'us' or 'hk') returns a 422 validation error
- HK region is currently a scaffold and may return incomplete or placeholder data
- Issuer disclosure data may lag real-time prices, causing stale market values
- Payment failure (insufficient USDC balance) returns a 402 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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