> ## Documentation Index
> Fetch the complete documentation index at: https://docs.msgflash.com/llms.txt
> Use this file to discover all available pages before exploring further.

# GET Legacy usage compatibility

> Legacy alias for public usage under `/api/v1/usage`.

## Endpoint

```txt theme={null}
GET /api/v1/usage
```

## Success response `200`

The response has the same format as `GET /api/v1/billing/usage`.

## Workspace rules

Like `/api/v1/billing/usage`, this endpoint requires a **personal API key** (`msgf_live_…`). A **team API key** is rejected with `403` and code [`TEAM_KEY_NOT_ALLOWED`](/resources/error-codes#teams-workspaces).