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Crypto ETF Sentinel — SEC Comment-Letter History by Issuer CIK
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Crypto ETF Sentinel — SEC Comment-Letter History by Issuer CIK is a paid API for AI agents from api.cryptoetfsentinel.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).
Returns the full chronological SEC ↔ issuer comment-letter history (UPLOAD/CORRESP pairs with review-intensity classification) for a single US spot crypto ETF issuer identified by SEC CIK.
Price / call$0.05
Success—
StatusUnknown
How this service works
Crypto ETF Sentinel — Full SEC ↔ issuer comment-letter history for one US spot crypto ETF issuer: UPLOAD/CORRESP pairs in order with a review-intensity profile. Comment-letter cadence is a leading indicator of approval proximity. Use when assessing how far along one filing's SEC review is. Pass the issuer's SEC CIK as cik.
Output
A chronological list of UPLOAD/CORRESP comment-letter pairs exchanged between the SEC and the issuer, each annotated with a review-intensity classification, giving a leading indicator of the issuer's proximity to ETF approval.
Example use cases
Example prompt
“Pull the full SEC comment-letter history for the crypto ETF issuer with CIK 0001980994 — I want to see all the UPLOAD and CORRESP pairs in order and their review-intensity classifications to gauge how close they are to approval.”
Technical details
Endpoint
GEThttps://api.cryptoetfsentinel.com/v1/issuers/comment-lettersWhen to prefer
Use this endpoint when you need the full regulatory correspondence timeline for a specific US spot crypto ETF issuer and want to assess approval likelihood based on comment-letter cadence and review intensity. Prefer this over the activity feed endpoint when you need exhaustive per-issuer historical depth rather than a broad recent-activity snapshot.
Side effects
- Invalid or non-numeric CIK returns a 400 validation error
- CIK not found in SEC EDGAR returns empty results or 404
- CIK exists but has no comment letters on record — returns empty array
- Payment not included or insufficient — returns 402 Payment Required
- Rate limiting or server overload — returns 429 or 503
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"cik": "0001980994"
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"data": {
"letters": [
{
"cik": "0001980994",
"company": "iShares Bitcoin Trust ETF",
"accession": "0001437749-25-023942",
"form_type": "CORRESP",
"file_number": null,
"filing_date": "2025-07-30",
"crypto_relevant": 1
},
{
"cik": "0001980994",
"company": "iShares Bitcoin Trust ETF",
"accession": "0001437749-25-015854",
"form_type": "CORRESP",
"file_number": null,
"filing_date": "2025-05-09",
"crypto_relevant": 1
},
{
"cik": "0001980994",
"company": "iShares Bitcoin Trust ETF",
"accession": "0000000000-25-001570",
"form_type": "UPLOAD",
"file_number": "333-272680",
"filing_date": "2025-02-12",
"crypto_relevant": 1
},
{
"cik": "0001980994",
"company": "iShares Bitcoin Trust ETF",
"accession": "0001437749-24-001046",
"form_type": "CORRESP",
"file_number": null,
"filing_date": "2024-01-09",
"crypto_relevant": 1
},
{
"cik": "0001980994",
"company": "iShares Bitcoin Trust ETF",
"accession": "0001437749-24-000954",
"form_type": "CORRESP",
"file_number": null,
"filing_date": "2024-01-09",
"crypto_relevant": 1
},
{
"cik": "0001980994",
"company": "iShares Bitcoin Trust ETF",
"accession": "0001437749-24-000919",
"form_type": "CORRESP",
"file_number": null,
"filing_date": "2024-01-09",
"crypto_relevant": 1
},
{
"cik": "0001980994",
"company": "iShares Bitcoin Trust ETF",
"accession": "0000000000-24-000277",
"form_type": "UPLOAD",
"file_number": "333-272680",
"filing_date": "2024-01-08",
"crypto_relevant": 1
},
{
"cik": "0001980994",
"company": "iShares Bitcoin Trust ETF",
"accession": "0001437749-24-000788",
"form_type": "CORRESP",
"file_number": null,
"filing_date": "2024-01-08",
"crypto_relevant": 1
},
{
"cik": "0001980994",
"company": "iShares Bitcoin Trust ETF",
"accession": "0000000000-24-000181",
"form_type": "UPLOAD",
"file_number": "333-272680",
"filing_date": "2024-01-05",
"crypto_relevant": 1
},
{
"cik": "0001980994",
"company": "iShares Bitcoin Trust ETF",
"accession": "0001437749-23-035560",
"form_type": "CORRESP",
"file_number": null,
"filing_date": "2023-12-29",
"crypto_relevant": 1
},
{
"cik": "0001980994",
"company": "iShares Bitcoin Trust ETF",
"accession": "0001437749-23-035272",
"form_type": "CORRESP",
"file_number": null,
"filing_date": "2023-12-22",
"crypto_relevant": 1
},
{
"cik": "0001980994",
"company": "iShares Bitcoin Trust ETF",
"accession": "0000000000-23-013802",
"form_type": "UPLOAD",
"file_number": "333-272680",
"filing_date": "2023-12-18",
"crypto_relevant": 1
},
{
"cik": "0001980994",
"company": "iShares Bitcoin Trust ETF",
"accession": "0001437749-23-034774",
"form_type": "CORRESP",
"file_number": null,
"filing_date": "2023-12-18",
"crypto_relevant": 1
},
{
"cik": "0001980994",
"company": "iShares Bitcoin Trust ETF",
"accession": "0001437749-23-033527",
"form_type": "CORRESP",
"file_number": null,
"filing_date": "2023-12-04",
"crypto_relevant": 1
},
{
"cik": "0001980994",
"company": "iShares Bitcoin Trust ETF",
"accession": "0000000000-23-012441",
"form_type": "UPLOAD",
"file_number": "333-272680",
"filing_date": "2023-11-13",
"crypto_relevant": 1
},
{
"cik": "0001980994",
"company": "iShares Bitcoin Trust ETF",
"accession": "0001437749-23-028552",
"form_type": "CORRESP",
"file_number": null,
"filing_date": "2023-10-19",
"crypto_relevant": 1
},
{
"cik": "0001980994",
"company": "iShares Bitcoin Trust ETF",
"accession": "0000000000-23-010822",
"form_type": "UPLOAD",
"file_number": "333-272680",
"filing_date": "2023-09-29",
"crypto_relevant": 1
}
],
"review_profile": {
"uploads": 5,
"last_letter": "2024-01-09",
"first_letter": "2023-09-29",
"approval_date": "2024-01-10T00:00:00",
"review_rounds": 5,
"review_status": "approved",
"correspondences": 9,
"withdrawal_date": null,
"registration_date": "2023-06-15T00:00:00",
"review_duration_days": 102,
"days_since_last_letter": 872
}
},
"meta": {
"note": null,
"page": null,
"limit": null,
"total": null,
"offset": null,
"full_count": null
},
"error": null
}Tags
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