{"resource":"https://api.cryptoetfsentinel.com/v1/xbrl/fee-war/history","service":null,"areas":["crypto_prices"],"answering":true,"http_status":402,"latency_ms":86,"price_usdc":0.1,"buyers_30d":2,"calls_30d":2,"description":"Crypto ETF Sentinel — Quarterly fee-war progression: average and median expense ratios over time across the US spot crypto ETF trading cohort, with per-issuer detail each quarter. Use when documenting how fee competition has compressed sinc","id":"bcf62324dc75","category":"Crypto prices","checked_day":"2026-10-11","page":"https://velliumandco.com/sellers/bcf62324dc75"}