# List toll-free use cases (/docs/api/routing/toll-free-verification/listTfvUseCases)

> For the complete documentation index, see [llms.txt](https://docs.tandemcx.ai/llms.txt). Any page on this site can be fetched as Markdown by appending `.md` to its URL.

`GET /v1/sms-registration/use-cases`

List toll-free use cases

The values a profile's useCase must be one of, as the carrier publishes them. Any other value is refused when the request is submitted.

## Request

**Base URL:** `https://api.tandemcx.ai`

**Authentication:** `Authorization: Bearer <token>` — A Tandem bearer token. Requests are scoped to the organization the token belongs to; no organization header is required.

No parameters or request body.

## Responses

### 200 — The valid use cases.

Type: array of string

### 401 — Missing, malformed, or expired bearer token.

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `error` | object | No | — |
| `error.code` | string | No | — |
| `error.message` | string | No | — |