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

# CrossmintApiVersions

> Flutter Abstract Final Class

**Abstract Final Class**

Centralised API version path prefixes used by every Crossmint service.

```dart theme={null}
abstract final class CrossmintApiVersions
```

Each constant maps to a specific backend contract. Keeping them here means
rolling an API version is a one-line change and grep is enough to audit
which endpoints would be affected.

## Static Properties

### users

```dart theme={null}
static const String users
```

Users API (`/users`).

### wallets

```dart theme={null}
static const String wallets
```

Wallets API — mainstream endpoints (wallets, signers, signatures, transactions).

### walletsAlpha

```dart theme={null}
static const String walletsAlpha
```

Wallets API — alpha endpoints (balance-only token queries).

### walletsLegacy

```dart theme={null}
static const String walletsLegacy
```

Wallets API — legacy endpoints (NFT enumeration).

### walletsUnstable

```dart theme={null}
static const String walletsUnstable
```

Wallets API — unstable endpoints (transfer history).

### orders

```dart theme={null}
static const String orders
```

Orders API (checkout).

### ordersUnstable

```dart theme={null}
static const String ordersUnstable
```

Orders API — unstable WebSocket endpoints.

### tokens

```dart theme={null}
static const String tokens
```

Tokens metadata API.

### credentials

```dart theme={null}
static const String credentials
```

Verifiable credentials API.