# List last-received observation ids by device

Canonical page: https://docs.ovok.com/api/slim/telemetry/list-last-received-observation-ids-by-device

`GET /v1/slim/telemetry/lastIds`

Returns the last-received Observation ids for every device in your project, keyed by device identifier.

**Auth:** bearer token. The caller must be a practitioner, an admin or a System Owner, and needs `Device:read` and `Device:search`.
**Scope:** the caller's project (from the token).

## Behaviour

- Covers the devices that have telemetry, up to the first 1000 devices of the project, including devices without a resident.
- Each value has the same shape as `GET /v1/slim/telemetry/{deviceId}/lastIds`. Fields are `null` when nothing has been received for them.

## Example

```bash
curl -X GET 'https://api.sandbox.ovok.com/v1/slim/telemetry/lastIds' \
  -H 'Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpYXQiOjE3NjcyNjg4MDAsImV4cCI6MTc2NzI3MjQwMH0.Ql3B_ztDvctlyZ2z0vp4sl3ExXRQGkzmxdmTAqxNzZk'
```