# Crypto ETF Sentinel — Quarterly Aggregate AUM Growth by Asset Category

> Crypto ETF Sentinel — Quarterly Aggregate AUM Growth by Asset Category is a paid API for AI agents from api.cryptoetfsentinel.com, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-15).

Returns quarterly aggregate AUM growth across all US spot crypto ETFs, bucketed by BTC, ETH, and Other asset categories, for market sizing and QoQ momentum tracking.

## Facts

- Endpoint: GET https://api.cryptoetfsentinel.com/v1/xbrl/aum-growth
- Price: $0.1/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-e0f0cc3d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eYHiTyUbbbHXpeWcv_vHW

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-e0f0cc3d
```

Example prompt: Pull the latest quarterly AUM growth data from Crypto ETF Sentinel for all US spot crypto ETFs, broken down by BTC, ETH, and Other categories, so I can see how the overall market is trending quarter over quarter.

## When to prefer this

Use this endpoint when you need a high-level market overview of the entire US spot crypto ETF sector rather than issuer-specific data. Ideal for macro trend analysis, investor reports, or sizing the market category across BTC, ETH, and other crypto asset buckets on a quarterly basis. Prefer over single-issuer XBRL endpoints when aggregate momentum is the goal.

## Known failure modes

- No data available yet for the current quarter — returns empty or partial dataset
- XBRL source filings not yet submitted by issuers — data may lag
- 402 Payment Required if x402 payment header is missing or insufficient
- Rate limiting or authentication errors if request volume is high
- Some issuers may not report XBRL-compatible data, affecting 'Other' bucket completeness

## How this service works

Crypto ETF Sentinel — Quarterly aggregate AUM growth across the US spot crypto ETF cohort, bucketed by BTC / ETH / SOL / multi / other. Use when sizing the crypto ETF market category or tracking quarter-over-quarter momentum from SEC-filed XBRL facts.

## Output

Returns quarterly aggregate AUM figures and growth rates across the entire US spot crypto ETF cohort, segmented into BTC, ETH, and Other buckets, enabling market-level sizing and QoQ momentum analysis.

## Example request

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

## 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-e0f0cc3d/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)