# Crypto ETF Sentinel — US Spot Crypto ETF Market Snapshot

> Crypto ETF Sentinel — US Spot Crypto ETF Market Snapshot 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 a single-call pipeline snapshot of the entire US spot crypto ETF market: DB totals, filings broken down by cryptocurrency and form type, regulatory-stage counts, and an as_of timestamp for stale-checking.

## Facts

- Endpoint: GET https://api.cryptoetfsentinel.com/v1/agent/snapshot
- Price: $0.05/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-cb0fd20b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SJPCd894GfvuPkL8iuM6y

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-cb0fd20b
```

Example prompt: Give me a quick heartbeat snapshot of the entire US spot crypto ETF market — how many issuers are currently trading, launch-imminent, under review, and what the overall filing breakdown looks like across cryptocurrencies and form types.

## When to prefer this

Use this endpoint as a lightweight heartbeat check before deciding whether to drill into more expensive per-issuer routes. Ideal when you need a market-wide pulse — total counts, stage distribution, and freshness — without querying individual issuers. Prefer this over per-issuer endpoints when you want aggregate statistics across all 100+ tracked ETF issuers in a single call.

## Known failure modes

- Payment required (402) if x402 USDC micropayment not included
- Stale data indicated by old as_of timestamp if upstream SEC data pipeline is delayed
- Empty or zero counts if no new filings have been processed
- Service unavailable (503) during maintenance windows

## How this service works

Crypto ETF Sentinel — Single-call market snapshot for US spot crypto ETFs (Bitcoin, Ethereum, Solana, XRP and more): DB totals, filings by cryptocurrency and form type, regulatory-stage counts, and an as_of ISO timestamp. Use as a cheap heartbeat to decide whether anything changed before drilling into the catalogue.

## Output

A JSON payload containing: total issuer and filing counts in the DB, filings segmented by cryptocurrency and SEC form type, regulatory-stage counts (trading / launch_imminent / under_review / registration_filed / approved / withdrawn), and an as_of ISO timestamp indicating data freshness.

## Example request

```json
{
 "properties": "snapshot"
}
```

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "as_of": "2026-05-13T15:30:00+00:00",
   "stage_counts": {
    "trading": 89,
    "under_review": 24,
    "launch_imminent": 4,
    "registration_filed": 18
   },
   "known_issuers": 105,
   "latest_filing": "2026-05-13T00:00:00+00:00",
   "total_filings": 3058,
   "earliest_filing": "2013-07-01T00:00:00+00:00",
   "filings_by_type": [
    {
     "count": 312,
     "filing_type": "S-1"
    },
    {
     "count": 38,
     "filing_type": "CERT"
    }
   ],
   "filings_by_currency": [
    {
     "count": 842,
     "currency": "bitcoin"
    },
    {
     "count": 671,
     "currency": "ethereum"
    }
   ]
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-cryptoetfsentinel-com-cb0fd20b/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)