# List runs

Source: https://langbot.ai/docs/api/sim/list-runs

`GET /v1/sim/runs`

Your simulation runs, newest first.

**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).

## Parameters

### Query parameters

| Name | Type | Required | Description |
|---|---|---|---|
| `limit` | integer | no | Page size. 1 to 100. Default `50`. |

## Request

**curl**

```bash
curl "https://api.langbot.ai/v1/sim/runs?limit=1" \
  -H "Authorization: Bearer $LANGBOT_API_TOKEN"
```

**Python**

```python
import os

import httpx

r = httpx.get(
    "https://api.langbot.ai/v1/sim/runs?limit=1",
    headers={"Authorization": f"Bearer {os.environ['LANGBOT_API_TOKEN']}"},
)
print(r.json())
```

**TypeScript**

```ts
const res = await fetch("https://api.langbot.ai/v1/sim/runs?limit=1", {
  headers: { Authorization: `Bearer ${process.env.LANGBOT_API_TOKEN}` },
});
console.log(await res.json());
```

## Response

`200 OK`

```json
{
  "runs": [
    { "id": "run_01K8Z3…", "kind": "server", "event_id": "ev_kxearningsmentiongs_26oct13", "strategy": "buy_yes_on_first_counting_hit", "net": 41.2, "created_at": 1793500000000 }
  ]
}
```

## Errors

| Status | `code` | When |
|---|---|---|
| 401 | `auth_required` | No token was sent. |
| 401 | `token_invalid` | The token was not recognised (mistyped, revoked or expired). |
| 422 | `validation_error` | A parameter failed validation; `detail[].loc` names it. |
| 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).