Endpoint · extractionGETapi.cryptoetfsentinel.com /v1/xbrl/fee-war ?crypto=bitcoin
Crypto ETF Sentinel — Crypto ETF fee comparison: current expense ratio for every trading US spot crypto ETF, cheapest first, outlier-capped at 200 bps to drop bad XBRL extractions.
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Crypto ETF Sentinel — Crypto ETF fee comparison: current expense ratio for every trading US spot crypto ETF, cheapest first, outlier-capped at 200 bps to drop bad XBRL extractions. Use when finding the lowest-cost Bitcoin, Ethereum or other crypto ETF, or benchmarking a fee. Optional crypto filter.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?
URL
https://api.cryptoetfsentinel.com/v1/xbrl/fee-war?crypto=bitcoin
Seen
first 35 days ago · last 18 hr ago
65 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
RATED
0.736 liveness verified, no letter
To a letter · 30 paid calls
0 of 30
Held down by latency p95 · gap to 1.000 is 0.264: 0.064 uncertain ? + 0.200 short ? · 0.064 to B
| 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 | 0.894 | 0.536 | 0 | −0.064 | |
| price stability the price stayed where it was listed |
0.20 | 1.00 | 1.000 | 0.200 | 0 | 0 | |
| Composite | 1.00 | 0.736 | gap to 1.000 = 0.264 · 0.200 short · 0.064 uncertain | 0.736 | −0.200 | −0.064 |
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 × 0.894 liveness
+ 0.200 × 1.000 price stability
= 0.736 → UNRATED: 58 of 30 paid calls weights 2026.09.6 · 58 samples · seed cap_01M1A5ACH0SEGWXR083601Y2BQ|2026-09-03T09:39:23.693Z|2026.09.6
Verify it yourself
npx teppi-check https://api.cryptoetfsentinel.com/v1/xbrl/fee-war?crypto=bitcoincurl -s https://api.teppi.xyz/v1/trust/cap_01M1A5ACH0SEGWXR083601Y2BQ