# List attestations

Source: https://langbot.ai/docs/api/receipts/list-attestations

`GET /v1/receipts/attestations`

Your own attestations, 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 |
|---|---|---|---|
| `event_id` | string | no | One event (`ev_…`). |
| `evt_id` | string | no | One fact (`evt_…`). |
| `since` | integer | no | ms epoch, by creation time. |
| `limit` | integer | no | Page size. 1 to 1000. Default `100`. |

## Request

**curl**

```bash
curl "https://api.langbot.ai/v1/receipts/attestations?event_id=ev_nvda_q3_2026" \
  -H "Authorization: Bearer $LANGBOT_API_TOKEN"
```

**Python**

```python
from langbot import LangbotClient

async with LangbotClient() as lb:  # reads LANGBOT_API_TOKEN
    for a in await lb.attestations(event_id="ev_nvda_q3_2026"):
        print(a["id"], a["evt_id"], a["t_acted"])
```

**TypeScript**

```ts
const res = await fetch("https://api.langbot.ai/v1/receipts/attestations?event_id=ev_nvda_q3_2026", {
  headers: { Authorization: `Bearer ${process.env.LANGBOT_API_TOKEN}` },
});
console.log(await res.json());
```

## Response

`200 OK`

```json
{ "attestations": [ { "id": "att_01K7Q…", "evt_id": "evt_01K7Q0000000000000000000A2", "event_hash": "5d0e05c3…", "t_acted": 1760050125000, "key_id": "56475aa75463474c", "signature": "…" } ] }
```

## 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).