# ETF & Macro Intelligence – Crypto ETF Fund Flows

> ETF & Macro Intelligence – Crypto ETF Fund Flows is a paid API for AI agents from x402-sand.vercel.app, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-18).

Fetches crypto ETF fund flow data for a given asset, including institutional fund movements and US macroeconomic context.

## Facts

- Endpoint: GET https://x402-sand.vercel.app/api/etf/fund-flows?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/etf-macro-intelligence-crypto-etf-fund-flows-7c950ef5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_T72zwipIBl_otmQZ5MRRz

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 etf-macro-intelligence-crypto-etf-fund-flows-7c950ef5
```

Example prompt: Can you pull the latest ETF fund flow data for Bitcoin, including any institutional inflows or outflows?

## When to prefer this

Choose this endpoint when you need real-time or recent crypto ETF fund flow data tied to a specific asset (e.g. BTC, ETH), especially when institutional flows and US macroeconomic context are relevant to your analysis. It is particularly useful for crypto-finance agents that need to monitor institutional sentiment or macro conditions affecting digital asset ETFs.

## Known failure modes

- Missing or invalid 'asset' query parameter returns an error or empty data array
- Unknown asset ticker returns empty data array with success:true but no records
- Rate limiting or payment failure (HTTP 402) if USDC payment is not properly submitted
- Network timeout if the upstream data source is unavailable
- Empty data array if no fund flow data is currently available for the requested asset

## How this service works

Crypto ETF flows, institutional fund data, and US macroeconomic events.

## Output

Returns a JSON object with an array of ETF fund flow records for the requested asset, including institutional fund movement data and potentially US macroeconomic event context. The response includes a success flag and the endpoint path.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input",
  "output"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "queryParams"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "const": "GET"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "asset"
     ],
     "properties": {
      "asset": {
       "type": "string",
       "description": "Example value: BTC"
      }
     },
     "additionalProperties": {
      "type": "string"
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {}
   },
   "additionalProperties": false
  }
 },
 "additionalProperties": false
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": [],
  "success": true,
  "endpoint": "/api/etf/fund-flows"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/etf-macro-intelligence-crypto-etf-fund-flows-7c950ef5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-sand.vercel.app](https://www.zero.xyz/host/x402-sand.vercel.app/llms.txt)