# List a booking's notifications (/docs/api-reference/scheduling-bookings/list-scheduling-booking-notifications)

What's been queued for this booking and what became of it, newest first, including why something wasn't sent. It never says who it went to.

`GET https://api.coss.com/v1/scheduling/bookings/{id}/notifications`

Authenticate with your API key as a bearer token (`Authorization: Bearer coss_test_…`). Responses are JSON with snake_case fields; errors are `{ error: { type, code, message, param?, issues?, request_id } }` (https://coss.com/docs/api-reference/errors.md).

## Path parameters

- `id` (string, required): The booking's id.

## Query parameters

- `limit` (integer, 1-100, default 20)
- `after` (string): The last id of the previous page.

## Example request

TypeScript (the `coss` package):

```ts
import { Coss } from "coss";

const coss = new Coss({
  apiKey: process.env.COSS_API_KEY,
  baseUrl: "https://api.coss.com",
});

const { data, error } = await coss.scheduling.bookings.notifications("book_01kd2m9a0b1c2d3e4f5g6h7j8m");
```

HTTP:

```sh
curl -X GET "https://api.coss.com/v1/scheduling/bookings/book_01kd2m9a0b1c2d3e4f5g6h7j8m/notifications" \
  -H "Authorization: Bearer $COSS_API_KEY"
```

## Response 200

The notifications.

- `object` ("list", required)
- `data` (object[], required)
  - `object` ("scheduling.booking_notification", required)
  - `id` (string, required)
  - `kind` (string, required): `reminder` for an entry of `reminders`; otherwise a standard notification, or `started`/`ended`.
  - `reminder_key` (string | null, required)
  - `channel` ("email" | "sms" | "webhook", required)
  - `recipient` ("attendee" | "host" | "endpoint" | "address", required)
  - `due_at` (string, required)
  - `finished_at` (string | null, required)
  - `outcome` (string | null, required): `null` while it's waiting. `sent`, or why not: `too_late`, `filtered`, `no_show`, `no_address`, `no_sender`, `stale`, `superseded`, `failed`.
- `has_more` (boolean, required)

Example:

```json
{
  "object": "list",
  "data": [
    {
      "object": "scheduling.booking_notification",
      "id": "sntf_01kd2m9a0b1c2d3e4f5g6h7j8m",
      "kind": "reminder",
      "reminder_key": "start-1440",
      "channel": "email",
      "recipient": "attendee",
      "due_at": "2027-01-03T15:00:00.000Z",
      "finished_at": null,
      "outcome": null
    }
  ],
  "has_more": false
}
```

## Errors

- `400`: The `Coss-Version` header names an unknown API version (`invalid_api_version`).
- `401`: The API key is missing, invalid, revoked or expired (`authentication_error`).
- `403`: The API key lacks the permission this endpoint needs (`permission_error`), or its organization is suspended (`organization_suspended`).
- `404`: Nothing with this id or uid exists in the environment (`not_found`).
- `429`: Too many requests with this API key (`rate_limited`), or too many requests with invalid keys from this address (`too_many_failed_authentications`). Retry after `Retry-After` seconds. Successful responses carry `RateLimit-Limit`, `RateLimit-Remaining` and `RateLimit-Reset` (seconds until the limit is fully restored).
- `500`: Unexpected server error (`api_error` / `internal_error`).
- `503`: The API key could not be verified right now; retry (`service_unavailable`).