# List reference series

Source: https://langbot.ai/docs/api/reference/list-reference-series

`GET /v1/reference/series`

The reference markets recorded on Langbot's clock that your account can read, with their periods and time range.

**Auth.** An API token: `Authorization: Bearer lb_…` ([create one](https://langbot.ai/app/tokens)). Signed-in web sessions work too.

**Limits.** Counts against your plan's API requests (60, 600 or 3,000 a minute on Free, Builder and Standard).

## Request

**curl**

```bash
curl "https://api.langbot.ai/v1/reference/series" \
  -H "Authorization: Bearer $LANGBOT_API_TOKEN"
```

**Python**

```python
from langbot import LangbotClient

async with LangbotClient() as lb:  # reads LANGBOT_API_TOKEN
    for s in await lb.reference_series():
        print(s.symbol, s.kind, s.periods, s.last_ts)
```

**TypeScript**

```ts
import { LangbotClient } from "@langbotai/sdk";

const lb = new LangbotClient(); // reads LANGBOT_API_TOKEN
const { series } = await lb.referenceSeries();
```

## Response

`200 OK`

```json
{
  "count": 2,
  "series": [
    { "symbol": "UST-2Y", "source": "treasury", "source_name": "U.S. Treasury daily par yield curve", "rights": "public_domain", "kind": "daily", "periods": [86400], "first_ts": 1577941200000, "last_ts": 1793854800000 },
    { "symbol": "UST-10Y", "source": "treasury", "source_name": "U.S. Treasury daily par yield curve", "rights": "public_domain", "kind": "daily", "periods": [86400], "first_ts": 1577941200000, "last_ts": 1793854800000 }
  ]
}
```

`kind` is `crypto` (24/7, 1-second and 1-minute bars) or `daily` (official daily series such as Treasury par yields). `rights` is the source's terms: only series whose terms allow Langbot to serve them are listed, so the list can be shorter than what is recorded.

## Errors

| Status | `code` | When |
|---|---|---|
| 401 | `auth_required` | No token was sent. |
| 401 | `token_invalid` | The token was not recognised (mistyped, revoked or expired). |
| 429 | `rate_limited` | Over your request budget; wait `Retry-After` seconds. |

Every error body is `{"detail": …, "code": "…"}`; branch on `code`. All codes: [Errors](https://langbot.ai/docs/api#errors).