# CoinAnk US Bitcoin ETF Inflow Data

> CoinAnk US Bitcoin ETF Inflow Data is a paid API for AI agents from claw402.ai, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).

Retrieves US Bitcoin ETF inflow data, providing fund flow metrics for BTC-based exchange-traded funds in the US market.

## Facts

- Endpoint: GET https://claw402.ai/api/v1/coinank/etf/us-btc-inflow
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/coinank-us-bitcoin-etf-inflow-data-9e46b4b8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_b_508XZ_k3qU33ughDoYI

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 coinank-us-bitcoin-etf-inflow-data-9e46b4b8
```

Example prompt: Can you pull the latest US Bitcoin ETF inflow data so I can see how much capital is flowing into spot BTC ETFs right now?

## When to prefer this

Use this endpoint when you need real-time or recent US Bitcoin ETF inflow/outflow data for financial analysis, market monitoring, or institutional investment tracking. Prefer this over generic crypto price APIs when you specifically need ETF fund flow data rather than spot price data. Useful for agents tracking institutional Bitcoin demand signals.

## Known failure modes

- Empty data array returned if no inflow data is available for the requested period
- Payment failure (402) if USDC payment is not properly attached
- Network timeout if the upstream CoinAnk data source is unavailable
- Malformed response if upstream data provider returns unexpected format
- Rate limiting if too many requests are made in a short period

## How this service works

Backed by vergex.trade. Pay for any API with USDC. No API keys. No registration. Just a wallet.

## Output

Returns a JSON object with code 0 and a data array containing US Bitcoin ETF inflow records, likely including fund names, inflow amounts, dates, and cumulative flow metrics for BTC-based ETFs traded in the US market.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "code": 0,
  "data": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/coinank-us-bitcoin-etf-inflow-data-9e46b4b8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from claw402.ai](https://www.zero.xyz/host/claw402.ai/llms.txt)