# Crypto ETF Sentinel — Cohort Wave State

> Crypto ETF Sentinel — Cohort Wave State is a paid API for AI agents from api.cryptoetfsentinel.com, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-14).

Returns whether a given cryptocurrency is currently in an active SEC approval wave for US spot ETFs, including wave anchor dates, anchor ticker, and approved vs pending cohort member counts.

## Facts

- Endpoint: GET https://api.cryptoetfsentinel.com/v1/pipeline/cohort-state
- Price: $0.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-cryptoetfsentinel-com-4fb1eff2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2lvZnSVCKUJQEhtx0dKCS

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-4fb1eff2
```

Example prompt: Is Solana currently in an active SEC approval wave for US spot ETFs? I want to know the wave state, when it first started, which ticker anchored it, and how many ETFs in that cohort are already approved versus still pending.

## When to prefer this

Use this endpoint when you need a real-time, binary answer to whether a specific cryptocurrency is currently inside an active SEC ETF approval cycle, along with cohort membership counts. Prefer this over general SEC filings feeds or issuer-level endpoints when the question is specifically about wave/cohort-level regulatory state rather than individual issuer details or XBRL financials.

## Known failure modes

- Asset not found or not tracked — returns error or empty data payload
- No active wave for the queried asset — in_wave returns false with null anchor fields
- Payment not included or insufficient — 402 Payment Required response
- Rate limiting or service unavailability — 5xx error response
- Malformed query parameters — 400 Bad Request

## How this service works

Crypto ETF Sentinel — Per-crypto regulatory wave state for US spot crypto ETFs (Bitcoin, Ethereum, Solana, XRP and more): in_wave, first_anchor_date, first_anchor_ticker, approved vs pending member counts. Use when asking 'is asset X in an active SEC approval cycle right now?' or comparing cohorts across assets.

## Output

Returns a JSON object with fields: in_wave (boolean or status string), first_anchor_date (ISO date of when the approval wave began), first_anchor_ticker (the ETF ticker that anchored the cohort), and counts of approved vs pending cohort members. Also includes standard meta fields (total, limit, offset) and an error field.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "crypto": "ethereum"
  }
 }
}
```

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "solana": {
    "in_wave": true,
    "pending_count": 3,
    "approved_count": 6,
    "first_anchor_date": "2026-02-12",
    "first_anchor_ticker": "BSOL"
   }
  },
  "meta": {
   "total": 34
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-cryptoetfsentinel-com-4fb1eff2/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)