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api.cryptoetfsentinel.com fee-war history
https://api.cryptoetfsentinel.com/v1/xbrl/fee-war/history
payable
Crypto ETF Sentinel — Quarterly fee-war progression — average + median expense ratios over time across the US spot crypto ETF trading cohort. Documents how fee competition has compressed since spot Bitcoin ETF launch in Jan 2024.
We sent a real
GET request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.10
- Network
- base
- Pay to
- 0x169Bf49c6ee5A179190121Ab8D180B50e31683d1
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- GET
- Response latency
- 140 ms
- Payment options
- 2 usable of 2
- Last checked
- 2026-08-10T09:18:15.866Z (1d ago)
- Category
- other
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.cryptoetfsentinel.com%2Fv1%2Fxbrl%2Ffee-war%2Fhistory"