# List calendar delegations (/docs/api-reference/scheduling-calendars/list-scheduling-calendar-delegations)

With how many hosts each has connected.

`GET https://api.coss.com/v1/scheduling/calendar_delegations`

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).

## 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.calendarDelegations.list();
```

HTTP:

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

## Response 200

The delegations.

- `object` ("list", required)
- `data` (object[], required)
  - `object` ("scheduling.calendar_delegation", required)
  - `id` (string, required)
  - `provider` ("google" | "microsoft", required)
  - `domain` (string, required)
  - `status` ("pending" | "active" | "failing" | "deleting", required): `pending`: not verified yet. `failing`: the provider refused access, and its hosts aren't offered until it's back. `deleting`: its connections are being removed.
  - `match_host_email` (boolean, required)
  - `client_id` (string, required): Google: the numeric client ID your Workspace admin authorizes.
  - `tenant_id` (string | null, required)
  - `scopes` (string[], required): What to authorize: OAuth scopes in Google's Admin console, the application permission in Entra.
  - `verified_account` (string | null, required)
  - `last_error_code` (string | null, required)
  - `failing_since` (string | null, required)
  - `secret_expires_at` (string | null, required)
  - `hosts_connected` (integer, required)
  - `hosts_failed` (integer, required): Hosts whose mailbox can't be reached, or who are out while this is `failing`.
  - `created_at` (string, required)
  - `updated_at` (string, required)
- `has_more` (boolean, required)

Example:

```json
{
  "object": "list",
  "data": [
    {
      "object": "scheduling.calendar_delegation",
      "id": "caldlg_01kd2m9a0b1c2d3e4f5g6h7j8m",
      "provider": "google",
      "domain": "example.com",
      "status": "active",
      "match_host_email": true,
      "client_id": "117063284751902345678",
      "tenant_id": null,
      "scopes": [
        "https://www.googleapis.com/auth/calendar.events.freebusy"
      ],
      "verified_account": "ana@example.com",
      "last_error_code": null,
      "failing_since": null,
      "secret_expires_at": null,
      "hosts_connected": 240,
      "hosts_failed": 1,
      "created_at": "2027-01-01T10:00:00.000Z",
      "updated_at": "2027-01-01T10:00:00.000Z"
    }
  ],
  "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`).
- `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`).