> From TickerLayer docs, Bonds: https://tickerlayer.com/docs/products/bonds#bond-last
> 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 yield

**Endpoint:** `GET /bond/last/:symbol`

Latest available yield curve rate for a supported country and tenor.

### Path parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `symbol` | string | Yes | Bond yield symbol in CC:TENOR format. US tenors support 1M, 3M, 6M, 1Y, 2Y, 3Y, 5Y, 7Y, 10Y, 20Y, and 30Y. DE, ES, FR, IT, and UK support 1Y, 2Y, 3Y, 5Y, 10Y, and 30Y. |

### Request

```bash
curl -sS "https://api.tickerlayer.com/bond/last/US:30Y" \
  -H "x-api-key: <YOUR_API_KEY>"
```

```python
import requests

res = requests.get(
    "https://api.tickerlayer.com/bond/last/US:30Y",
    headers={"x-api-key": "<YOUR_API_KEY>"},
)
print(res.json())
```

```javascript
const res = await fetch("https://api.tickerlayer.com/bond/last/US:30Y", {
  headers: { "x-api-key": "<YOUR_API_KEY>" },
});
const data = await res.json();
console.log(data);
```

```go
req, _ := http.NewRequest("GET", "https://api.tickerlayer.com/bond/last/US:30Y", nil)
req.Header.Set("x-api-key", "<YOUR_API_KEY>")
```

### Response

```json
{
  "symbol": "US:30Y",
  "rate": 4.86,
  "unit": "percent",
  "date": "2026-06-25",
  "timestamp": 1782345600000
}
```

### Notes

`400 invalid symbol` for malformed symbols. `404 symbol not available` for unsupported country or tenor pairs. `503 market data temporarily unavailable` when no current or cached value is available.