# x402-seller ETF Flows

> x402-seller ETF Flows is a paid API for AI agents from x402-seller-m8nx.onrender.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).

Returns volume-weighted estimated net flows (in USD) for one or more Bitcoin or crypto ETF ticker symbols over a configurable number of days

## Facts

- Endpoint: GET https://x402-seller-m8nx.onrender.com/etf/flows?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-seller-etf-flows-31d786a2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zahJJ3gZjsBO0EYzYRJsR

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 x402-seller-etf-flows-31d786a2
```

Example prompt: Pull the last 5 days of net flow estimates for IBIT, FBTC, and ARKB so I can see which Bitcoin ETF is attracting the most institutional money right now.

## When to prefer this

Choose this endpoint when you need a quick, single-call estimate of ETF capital flows across multiple Bitcoin ETF tickers without needing to stitch together Yahoo Finance OHLCV data yourself. It is ideal for autonomous trading agents that want a lightweight, pay-per-use institutional demand signal without API key setup. Prefer alternatives if you need tick-level precision, official fund-reported flow data, or flows for non-crypto ETFs.

## Known failure modes

- Missing or invalid 'symbols' query parameter returns an error — symbols is required
- Unrecognized ticker symbols may return null or zero-value flow data
- Payment failure (insufficient USDC balance or x402 protocol error) blocks the request
- Yahoo Finance data lag or downtime may result in stale or unavailable as_of dates
- Requesting too many symbols in one call may cause timeout on the Render-hosted service

## How this service works

Rug protection and decision-ready intelligence for autonomous trading agents. Keyless by design: no signup, no API key — pay a cent per request in USDC (x402). The /alpha/launches LAUNCH RADAR discovers what just launched AND rug-screens every candidate in one call, ranked per-token verdicts — the proactive 'give me safe alpha' call. /vet gives a single-token go/no-go in ONE call by fusing a COMPOSITE rug score (GoPlus static analysis + a LIVE Honeypot.is buy/sell simulation + serial-rugger check) with our SELF-COLLECTED liquidity-drain trend — a rug-in-progress signal that exists nowhere for free because it requires collecting reserves over time. One call is cheaper than the inference tokens you'd burn stitching 4 free APIs, and it stops your agent losing its whole position to a honeypot. Also: /onchain/liquidity drain detector, /screen batch watchlist check, /brief market regime, and raw feeds (prices, stocks, DEX pools, launches, perp funding/OI).

## Output

Returns a JSON object with an as_of date, source attribution (Yahoo Finance OHLCV), methodology note (volume-weighted price-action estimate), the list of symbols queried, a total_net_flow_usd across all symbols, and a per_symbol array containing each ticker's close price, volume, and net_flow_usd estimate.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "symbols"
     ],
     "properties": {
      "days": {
       "type": "string",
       "default": "5"
      },
      "symbols": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "as_of": "2026-07-25",
  "source": "Yahoo Finance OHLCV",
  "per_symbol": [
   {
    "close": 57.32,
    "symbol": "IBIT",
    "volume": 12000000,
    "net_flow_usd": 80000000
   },
   {
    "close": 55.1,
    "symbol": "FBTC",
    "volume": 4500000,
    "net_flow_usd": 30000000
   },
   {
    "close": 52.8,
    "symbol": "ARKB",
    "volume": 2100000,
    "net_flow_usd": 15000000
   }
  ],
  "methodology": "volume-weighted price-action estimate",
  "symbols_queried": [
   "IBIT",
   "FBTC",
   "ARKB"
  ],
  "total_net_flow_usd": 125000000
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-seller-etf-flows-31d786a2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-seller-m8nx.onrender.com](https://www.zero.xyz/host/x402-seller-m8nx.onrender.com/llms.txt)