https://api.cryptoetfsentinel.com/v1/issuers/comment-letters
https://api.cryptoetfsentinel.com/v1/issuers/comment-lettersOverview
SEC↔issuer correspondence (UPLOAD/CORRESP filings) as EDGAR publishes them. Mostly retrospective; SEC rarely releases letters during active review. Crypto ETF Sentinel — regulatory data oracle for US spot crypto ETFs. Pay in USDC on Base or Solana.
Protocol
x402
Price
—
Payment Asset
USD Coin
Payment Network
eip155:8453
Category
finance/regulatory
Provider
cryptoetfsentinel
Source
bazaar
Indexed
2026-05-13 19:55:22
Health
Status
healthy
Latency (p50)
44ms
Uptime (30d)
100.0%
Reliability Score
100/100
Last Checked
2026-08-17 22:37:36
Last Healthy
2026-08-17 22:37:36
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
Valid
Asset Verified
Known USDC
Facilitator
—
Recent Health Checks
| Time | Status | HTTP | Latency | Error |
|---|---|---|---|---|
| 2026-08-17 22:37:36 | healthy | 402 | 74ms | |
| 2026-08-17 15:22:06 | healthy | 402 | 37ms | |
| 2026-08-17 10:46:52 | healthy | 402 | 39ms | |
| 2026-08-17 04:59:35 | healthy | 402 | 45ms | |
| 2026-08-16 23:08:45 | healthy | 402 | 36ms | |
| 2026-08-16 14:20:28 | healthy | 402 | 50ms | |
| 2026-08-16 12:25:58 | healthy | 402 | 38ms | |
| 2026-08-16 05:20:24 | healthy | 402 | 60ms | |
| 2026-08-16 00:25:17 | healthy | 402 | 37ms | |
| 2026-08-15 19:59:58 | healthy | 402 | 41ms | |
| 2026-08-15 12:28:58 | healthy | 402 | 44ms | |
| 2026-08-15 09:03:41 | healthy | 402 | 63ms | |
| 2026-08-15 05:00:28 | healthy | 402 | 425ms |