> From TickerLayer docs, Crypto: https://tickerlayer.com/docs/products/crypto#crypto-quote
> 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

## Latest quote

**Endpoint:** `GET /crypto/quote/:symbol`

Best bid and ask with sizes from the latest normalized book snapshot for the symbol.

### Path parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `symbol` | string | Yes | Enabled crypto symbol (e.g. BTCUSD). Trimmed and uppercased before lookup. Retrieve the full list from GET /crypto/symbols. |

### Request

```bash
curl -sS "https://api.tickerlayer.com/crypto/quote/BTCUSD" \
  -H "x-api-key: <YOUR_API_KEY>"
```

```python
import requests

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

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

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

### Response

```json
{
  "symbol": "BTCUSD",
  "bid": 84210.12,
  "ask": 84210.45,
  "bid_size": 1.2,
  "ask_size": 0.8,
  "timestamp": 1743512400000
}
```

### Notes

`404 unknown symbol`: symbol not in the enabled registry. `404 no quote available`: cache has no quote yet for this symbol.