# Crypto ETF Sentinel — Top-N Pre-Approval Issuer Filing Velocity

> Crypto ETF Sentinel — Top-N Pre-Approval Issuer Filing Velocity is a paid API for AI agents from api.cryptoetfsentinel.com, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-15).

Returns the top-N most-active pre-approval US spot crypto ETF issuers ranked by 42-day SEC action-filing count, signaling imminent regulatory stage transitions.

## Facts

- Endpoint: GET https://api.cryptoetfsentinel.com/v1/pipeline/velocity
- Price: $0.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-cryptoetfsentinel-com-51e06f2a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Y27oUhlSGWnnD2M07qcaC

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability api-cryptoetfsentinel-com-51e06f2a
```

Example prompt: Which US spot crypto ETF issuers are filing the most aggressively with the SEC right now — show me the top issuers ranked by their 42-day action-filing count so I can spot who's closest to approval.

## When to prefer this

Use this endpoint when you need a macro-level signal of which crypto ETF issuers are most active in their SEC approval process, especially to identify candidates likely to imminently transition stages. Prefer this over single-issuer comment letter or XBRL endpoints when you want a ranked comparative view across all pre-approval issuers rather than deep-dive data on one specific issuer.

## Known failure modes

- No pre-approval issuers found if all active issuers have transitioned to trading/withdrawn — returns empty list
- Payment required (402) if x402 USDC payment header is missing or insufficient
- Invalid query parameters return 400 validation error
- Stale data if SEC EDGAR feed has not refreshed recently — filing counts may lag by hours

## How this service works

Crypto ETF Sentinel — Top-N most-active pre-approval US spot crypto ETF issuers by 42-day action-filing count (S-1/A, CORRESP and similar). High velocity means sustained SEC dialogue, a frequent leading indicator of stage transitions. Use when you want to know which pending crypto ETFs are moving right now. Optional limit param.

## Output

An ordered list of the top-N pre-approval US spot crypto ETF issuers ranked by their 42-day SEC action-filing count, including issuer name, CIK, filing count, velocity rank, and current regulatory stage — indicating which issuers are in sustained dialogue with the SEC and likely nearing a stage transition.

## Example request

```json
{
 "properties": "top_10"
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-cryptoetfsentinel-com-51e06f2a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.cryptoetfsentinel.com](https://www.zero.xyz/host/api.cryptoetfsentinel.com/llms.txt)