# List your OAuth apps (/docs/api-reference/scheduling-calendars/list-scheduling-oauth-apps)

At most one per provider, with how many connections use each.

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

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.oauthApps.list();
```

HTTP:

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

## Response 200

The apps.

- `object` ("list", required)
- `data` (object[], required)
  - `object` ("scheduling.oauth_app", required)
  - `id` (string, required)
  - `provider` ("google" | "microsoft" | "zoom", required)
  - `client_id` (string, required)
  - `tenant_id` (string | null, required)
  - `redirect_uri` (string | null, required)
  - `coss_callback_url` (string, required): Register this with the provider if `redirect_uri` isn't set. If it is, that page forwards `code` and `state` here.
  - `completion_url` (string | null, required)
  - `zoom_event_url` (string | null, required): Zoom only: the Event notification endpoint URL for your app's deauthorization events.
  - `scopes` (string[], required): What to enable on your app at the provider.
  - `status` ("active" | "failing", required): `failing`: the provider refused the app's credentials. New consents are refused, and calendars connected through it can't be read until they work again.
  - `last_error_code` (string | null, required)
  - `last_error_at` (string | null, required)
  - `secret_expires_at` (string | null, required)
  - `verified_at` (string | null, required): When a consent first completed through this app, which proves its secret.
  - `connections` (integer, required): Calendar connections using this app. It can't be deleted while there are any.
  - `created_at` (string, required)
  - `updated_at` (string, required)
- `has_more` (boolean, required)

Example:

```json
{
  "object": "list",
  "data": [
    {
      "object": "scheduling.oauth_app",
      "id": "calapp_01kd2m9a0b1c2d3e4f5g6h7j8m",
      "provider": "google",
      "client_id": "1234567890-abc.apps.googleusercontent.com",
      "tenant_id": null,
      "redirect_uri": "https://example.com/oauth/google",
      "coss_callback_url": "https://api.coss.com/scheduling/oauth/google/callback",
      "completion_url": "https://example.com/calendar-connected",
      "zoom_event_url": null,
      "scopes": [
        "https://www.googleapis.com/auth/calendar.events.freebusy"
      ],
      "status": "active",
      "last_error_code": null,
      "last_error_at": null,
      "secret_expires_at": null,
      "verified_at": "2027-01-01T10:00:00.000Z",
      "connections": 12,
      "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`).