## List all current plans
Retrieve a list of all current plans available for the merchant.
Plans represent different levels of service or pricing plans currently available.
The `selectable` flag indicates if a plan can be subscribed to via self-service.

## Endpoint signature

```http
POST https://api.reservepay.com/merchants/list-plans HTTP/1.1
Content-Type: application/json
Accept: application/json
Authorization: Bearer <token>

{}
```

Returns: array

## Response attributes

### `id` (string)

_Nullable_. The unique identifier of the plan.

### `tier_code` (string)

**Always present**. The code representing the tier this plan belongs to.

Possible values:

- `pay_as_you_go`
- `startup`
- `professional`
- `enterprise`

### `tier_name` (string)

**Always present**. The name of the tier (e.g., 'Basic', 'Pro').

### `features` (array)

**Always present**. List of features included in this plan.

### `revision_time` (number)

**Always present**. The date and time when the plan was last revised.

### `selectable` (boolean)

**Always present**. Indicates whether the plan can be selected by the merchant via self-service.

## Errors common to all endpoints

### `UNHANDLED_ERROR`

This error occurs when the server encounters an unexpected internal error that
it cannot handle gracefully. This typically happens due to bugs, infrastructure
issues, or edge cases that weren't anticipated during development.

### `INVALID_ARGUMENTS`

This error occurs when the request contains invalid or missing parameters.
Common cases include missing required fields, or values that don't match the
expected format or type.

### `BAD_VERSION`

This error occurs when making requests to an API version that does not exist.
This commonly happens when using an outdated SDK or when the API version
specified in the request URL is incorrect.