api.cryptoetfsentinel.com

https://api.cryptoetfsentinel.com/v1/xbrl/fee-war/history

Shares a payout wallet with 22 other endpoints — its adoption is attributed from that shared wallet's traffic, not earned exclusively.

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.

63
reliability

Reliability & health

Uptime and response time from our own unpaid probes, plus the reliability score built from them.

7 days 30 days

Uptime

100.0% avg
0% 50% 100% Mon 8 PMThu 12 AMSat 4 AMMon 4 PM

Response time

p50 373ms · p95 413ms
0ms 250ms 500ms Mon 8 PMThu 12 AMSat 4 AMMon 4 PM
Data table
Reliability history per time bucket over the last 7 days (hourly).
Bucket Uptime Probes Response time
9/28/2026, 8:00:00 PM 100% 1 374ms
9/28/2026, 10:00:00 PM 100% 1 382ms
9/29/2026, 12:00:00 AM 100% 1 385ms
9/29/2026, 1:00:00 AM 100% 1 383ms
9/29/2026, 3:00:00 AM 100% 1 377ms
9/29/2026, 5:00:00 AM 100% 1 377ms
9/29/2026, 7:00:00 AM 100% 1 393ms
9/29/2026, 9:00:00 AM 100% 1 373ms
9/29/2026, 11:00:00 AM 100% 1 369ms
9/29/2026, 1:00:00 PM 100% 1 397ms
9/29/2026, 3:00:00 PM 100% 1 386ms
9/29/2026, 5:00:00 PM 100% 1 426ms
9/29/2026, 7:00:00 PM 100% 1 429ms
9/29/2026, 9:00:00 PM 100% 1 371ms
9/29/2026, 11:00:00 PM 100% 1 381ms
9/30/2026, 2:00:00 AM 100% 1 382ms
9/30/2026, 4:00:00 AM 100% 1 406ms
9/30/2026, 6:00:00 AM 100% 1 386ms
9/30/2026, 8:00:00 AM 100% 1 378ms
9/30/2026, 10:00:00 AM 100% 1 413ms
9/30/2026, 12:00:00 PM 100% 1 380ms
9/30/2026, 2:00:00 PM 100% 1 405ms
9/30/2026, 4:00:00 PM 100% 1 390ms
9/30/2026, 6:00:00 PM 100% 1 397ms
9/30/2026, 8:00:00 PM 100% 1 394ms
9/30/2026, 10:00:00 PM 100% 1 396ms
10/1/2026, 12:00:00 AM 100% 1 383ms
10/1/2026, 2:00:00 AM 100% 1 405ms
10/1/2026, 4:00:00 AM 100% 1 387ms
10/1/2026, 6:00:00 AM 100% 1 418ms
10/1/2026, 8:00:00 AM 100% 1 356ms
10/1/2026, 10:00:00 AM 100% 1 413ms
10/1/2026, 12:00:00 PM 100% 1 366ms
10/1/2026, 2:00:00 PM 100% 1 383ms
10/1/2026, 4:00:00 PM 100% 1 359ms
10/1/2026, 6:00:00 PM 100% 1 377ms
10/1/2026, 8:00:00 PM 100% 1 382ms
10/1/2026, 10:00:00 PM 100% 1 382ms
10/2/2026, 12:00:00 AM 100% 1 354ms
10/2/2026, 2:00:00 AM 100% 1 349ms
10/2/2026, 4:00:00 AM 100% 1 357ms
10/2/2026, 6:00:00 AM 100% 1 395ms
10/2/2026, 8:00:00 AM 100% 1 375ms
10/2/2026, 10:00:00 AM 100% 1 358ms
10/2/2026, 12:00:00 PM 100% 1 347ms
10/2/2026, 2:00:00 PM 100% 1 350ms
10/2/2026, 4:00:00 PM 100% 1 361ms
10/2/2026, 6:00:00 PM 100% 1 355ms
10/2/2026, 8:00:00 PM 100% 1 359ms
10/2/2026, 11:00:00 PM 100% 1 359ms
10/3/2026, 12:00:00 AM 100% 1 367ms
10/3/2026, 2:00:00 AM 100% 1 366ms
10/3/2026, 4:00:00 AM 100% 1 348ms
10/3/2026, 6:00:00 AM 100% 1 373ms
10/3/2026, 8:00:00 AM 100% 1 367ms
10/3/2026, 10:00:00 AM 100% 1 354ms
10/3/2026, 12:00:00 PM 100% 1 356ms
10/3/2026, 2:00:00 PM 100% 1 372ms
10/3/2026, 4:00:00 PM 100% 1 351ms
10/3/2026, 6:00:00 PM 100% 1 356ms
10/3/2026, 8:00:00 PM 100% 1 380ms
10/3/2026, 11:00:00 PM 100% 1 354ms
10/4/2026, 1:00:00 AM 100% 1 366ms
10/4/2026, 3:00:00 AM 100% 1 372ms
10/4/2026, 5:00:00 AM 100% 1 384ms
10/4/2026, 7:00:00 AM 100% 1 366ms
10/4/2026, 8:00:00 AM 100% 1 350ms
10/4/2026, 1:00:00 PM 100% 1 353ms
10/4/2026, 3:00:00 PM 100% 1 358ms
10/4/2026, 5:00:00 PM 100% 1 387ms
10/4/2026, 7:00:00 PM 100% 1 350ms
10/4/2026, 9:00:00 PM 100% 1 345ms
10/5/2026, 2:00:00 AM 100% 1 346ms
10/5/2026, 7:00:00 AM 100% 1 352ms
10/5/2026, 9:00:00 AM 100% 1 365ms
10/5/2026, 11:00:00 AM 100% 1 359ms
10/5/2026, 1:00:00 PM 100% 1 357ms
10/5/2026, 2:00:00 PM 100% 1 370ms
10/5/2026, 4:00:00 PM 100% 1 377ms
63
Composite reliability — the weighted average of the dimensions below, on a 0–100 scale.
Availability
100

How often it was reachable when we probed it (weight 35%).

Latency
97

How quickly it answers when it is up — fast scores high (weight 20%).

Security
100

Whether it serves over working TLS / https (weight 15%).

Transparency
67

Whether the operator disclosed what it does — description, schema, identity (weight 15%).

Activity
3

Observed on-chain payments to this endpoint's wallet — transactions, volume, and distinct paying wallets over the last month (weight 15%; not yet measured when we have not seen its wallet settle).

Confidence 100% — how much probe evidence backs this score. A thin history is flagged, not hidden.

See the scoring methodology for exactly how each number is computed.

Payment

Currencies
USDC
Networks
base, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp
Facilitator
unknown
SDK
unknown

Operator

Company
inferred — unknown
Jurisdiction
—
Registrar
Cloudflare, Inc.
Domain registered
2026-02-24
Hosting network
CLOUD-NBG1
Hosting country
DE

Operator context is derived from public RDAP/TLS records and unverified. Company and country are only available for endpoints that publish them (an OV/EV TLS certificate or a non-redacted domain record); most endpoints are CDN-fronted and disclose neither.

On-chain activity (base)

64
payments (30d)
12.9
USD volume (30d)
7
paying wallets (30d)

Payments per day

last payment 10/5/2026
0 15 30 Sep 6Sep 16Sep 25Oct 5
Data table
Settled payments per day.
Day Payments Volume (USD) Paying wallets
9/6/2026 24 5.39 2
9/7/2026 4 1.75 1
9/9/2026 1 0.03 1
9/11/2026 3 0.13 1
9/12/2026 1 0.03 1
9/16/2026 1 0.03 1
9/17/2026 1 0.03 1
9/18/2026 1 0.03 1
9/23/2026 1 0.03 1
9/25/2026 1 0.03 1
9/29/2026 1 0.05 1
9/30/2026 1 0.03 1
10/2/2026 1 0.05 1
10/4/2026 1 0.03 1
10/5/2026 22 5.26 1

This payout wallet is shared: figures cover all 23 endpoints paid at it, since payments cannot be attributed to one of them. Only payments settled on chains and facilitators we index.

Linked by wallet — likely same operator

On-chain agent identity and the x402 endpoint that shares its settlement wallet.

https://api.cryptoetfsentinel.com/v1/xbrl/leaderboard x402 endpoint https://api.cryptoetfsentinel.com/v1/agent/filings/recent x402 endpoint https://api.cryptoetfsentinel.com/v1/events x402 endpoint
Response schema 
{
  "$ref": "#/components/schemas/ApiResponse_list_FeeWarHistoryPointOut__"
}