> From TickerLayer docs, ETFs: https://tickerlayer.com/docs/rest/etfs#etfs-snapshot
> REST base URL https://api.tickerlayer.com, API key in the `x-api-key` header. WebSocket wss://stream.tickerlayer.com?apiKey=YOUR_API_KEY. Full API reference: https://tickerlayer.com/llms-full.txt

## Snapshot

**Endpoint:** `GET /etfs/snapshot/:symbol`

Combined bid/ask, last reference level, previous daily close, and change metrics.

### Path parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `symbol` | string | Yes | Enabled ETF-style symbol (e.g. US500ETF, US100ETF, HK:2800). Most are product codes; a few Asian listings carry a market prefix. Trimmed and uppercased before lookup. Full list: GET /etfs/symbols. |

### Request

```bash
curl -sS "https://api.tickerlayer.com/etfs/snapshot/US100ETF" \
  -H "x-api-key: <YOUR_API_KEY>"
```

```python
import requests

res = requests.get(
    "https://api.tickerlayer.com/etfs/snapshot/US100ETF",
    headers={"x-api-key": "<YOUR_API_KEY>"},
)
print(res.json())
```

```javascript
const res = await fetch("https://api.tickerlayer.com/etfs/snapshot/US100ETF", {
  headers: { "x-api-key": "<YOUR_API_KEY>" },
});
const data = await res.json();
console.log(data);
```

```go
req, _ := http.NewRequest("GET", "https://api.tickerlayer.com/etfs/snapshot/US100ETF", nil)
req.Header.Set("x-api-key", "<YOUR_API_KEY>")
```

### Response

```json
{
  "symbol": "US100ETF",
  "bid": 528.90,
  "ask": 528.90,
  "bid_size": 39,
  "ask_size": 85,
  "last_price": 528.90,
  "last_timestamp": 1743512400000,
  "prev_close": 525.00,
  "change": 3.90,
  "change_percent": 0.7429
}
```

### Notes

`change_percent` is `null` when `prev_close` is zero or unavailable. Responses do not include `last_size`.