history?crypto=bitcoin

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.

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 since the January 2024 spot Bitcoin ETF launch. Optional crypto filter.

UNRATEDListed

Overview

Grade?

UNRATED

0 of 30 paid calls toward a letter

Price

$0.10 per call

Paid calls

none yet

delivery unknown until someone pays

More info

Seller?

0x169bf49c…e31683d1

URL

https://api.cryptoetfsentinel.com/v1/xbrl/fee-war/history?crypto=bitcoin

Seen

first 34 days ago · last 14 hr ago

63 free handshakes

Payment

Pays through

x402

Offered on?

Base USDC, Solana

Listed on?

Base, Solana

Score, from free handshakes onlyweights 2026.09.6

UN
RATED

0.734 liveness verified, no letter

To a letter · 30 paid calls

0 of 30

Held down by latency p95 · gap to 1.000 is 0.266: 0.066 uncertain ? + 0.200 short ? · 0.066 to B

How the composite of 0.734 is made up, part by part
Component	Weight	Measured	Lower bound ?		Adds	Short ?	Uncertain ?
latency p95costs the most it answered as fast as its class	0.20	0.00	0.000		0.000	−0.200	0
liveness it answered at all	0.60	1.00	0.890		0.534	0	−0.066
price stability the price stayed where it was listed	0.20	1.00	1.000		0.200	0	0
Composite	1.00		0.734	gap to 1.000 = 0.266 · 0.200 short · 0.066 uncertain	0.734	−0.200	−0.066

Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check

The multiplication, written out

  0.200 × 0.000   latency p95    
+ 0.600 × 0.890   liveness       
+ 0.200 × 1.000   price stability
= 0.734           → UNRATED: 56 of 30 paid calls      weights 2026.09.6 · 56 samples · seed cap_01M1A5QFAN2MMM23Y69H9C6PH0|2026-09-03T13:19:27.755Z|2026.09.6

Verify it yourselfnpx teppi-check https://api.cryptoetfsentinel.com/v1/xbrl/fee-war/history?crypto=bitcoincurl -s https://api.teppi.xyz/v1/trust/cap_01M1A5QFAN2MMM23Y69H9C6PH0