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

# Version 1.3.13

> Package reorganization and improved module structure

<Card img="https://mcp-use.com/api/og/release?v=1.3.13" title="Release 1.3.13" href="https://github.com/mcp-use/mcp-use/releases/tag/python-v1.3.13">
  This release focuses on **package reorganization** to provide clearer module structure and better separation of concerns.
</Card>

This release focuses on package reorganization to provide clearer module structure and better separation of concerns. The library has been restructured into logical namespaces for improved discoverability and maintainability.

## Bug Fixes

### LangChain Version Compatibility

Fixed compatibility issues caused by LangChain's 1.0.0 release. The library is temporarily pinned to LangChain 0.3.27 to prevent breaking changes. Migration to LangChain 1.0.0 is planned for a future release.

## Package Reorganization

The package has been reorganized into clearer, more intuitive modules:

* **`mcp_use.client.*`** - Client-related functionality
  * `mcp_use.client.auth` - Authentication mechanisms (OAuth, Bearer)
  * `mcp_use.client.connectors` - Connection transports (HTTP, WebSocket, Stdio, Sandbox)
  * `mcp_use.client.middleware` - Request/response middleware
  * `mcp_use.client.task_managers` - Connection task managers

* **`mcp_use.agents.*`** - Agent-related functionality
  * `mcp_use.agents.adapters` - LLM framework adapters (LangChain, etc.)
  * `mcp_use.agents.managers` - Server management tools and utilities

This reorganization provides:

* Better code discoverability through logical namespacing
* Clear separation between client and agent concerns
* Improved maintainability and extensibility
* More intuitive import paths

## Deprecation Notices

<Warning>
  The following import paths are now deprecated and will be removed in future versions:
</Warning>

### Authentication

```python theme={null}
# Deprecated
from mcp_use.auth import BearerAuth, OAuth
from mcp_use.auth.oauth_callback import OAuthCallbackServer, CallbackResponse

# Use instead
from mcp_use.client.auth import BearerAuth, OAuth
from mcp_use.client.auth.oauth_callback import OAuthCallbackServer, CallbackResponse
```

### Middleware

```python theme={null}
# Deprecated
from mcp_use.middleware import Middleware, MiddlewareManager, MiddlewareContext
from mcp_use.middleware.metrics import MetricsMiddleware, PerformanceMetricsMiddleware, ErrorTrackingMiddleware, CombinedAnalyticsMiddleware

# Use instead
from mcp_use.client.middleware import Middleware, MiddlewareManager, MiddlewareContext
from mcp_use.client.middleware.metrics import MetricsMiddleware, PerformanceMetricsMiddleware, ErrorTrackingMiddleware, CombinedAnalyticsMiddleware
```

### Task Managers

```python theme={null}
# Deprecated
from mcp_use.task_managers import ConnectionManager, SseConnectionManager, StdioConnectionManager, StreamableHttpConnectionManager, WebSocketConnectionManager

# Use instead
from mcp_use.client.task_managers import ConnectionManager, SseConnectionManager, StdioConnectionManager, StreamableHttpConnectionManager, WebSocketConnectionManager
```

### Adapters

```python theme={null}
# Deprecated
from mcp_use.adapters import BaseAdapter, LangChainAdapter

# Use instead
from mcp_use.agents.adapters import BaseAdapter, LangChainAdapter
```

### Server Managers

```python theme={null}
# Deprecated
from mcp_use.managers import ServerManager, MCPServerTool, ConnectServerTool, DisconnectServerTool, GetActiveServerTool, ListServersTool, SearchToolsTool

# Use instead
from mcp_use.agents.managers import ServerManager, MCPServerTool, ConnectServerTool, DisconnectServerTool, GetActiveServerTool, ListServersTool, SearchToolsTool
```

### Exceptions

```python theme={null}
# Deprecated
from mcp_use.exceptions import MCPError, OAuthDiscoveryError, OAuthAuthenticationError, ConnectionError, ConfigurationError

# Use instead
from mcp_use.client.exceptions import MCPError, OAuthDiscoveryError, OAuthAuthenticationError, ConnectionError, ConfigurationError
```

### Types

```python theme={null}
# Deprecated
from mcp_use.types.sandbox import SandboxOptions

# Use instead
from mcp_use.client.connectors.sandbox import SandboxOptions
```

**Backward Compatibility:** All deprecated import paths continue to work in version 1.3.13 but will emit deprecation warnings. Please migrate to the new import paths before the next major release.

**Note:** Top-level imports like `from mcp_use import MCPAgent, MCPClient, MCPSession` remain supported and are NOT deprecated.

## Migration Guide

To migrate your code:

1. Replace old import paths with new ones as shown above
2. Run your tests to ensure everything works
3. The functionality remains identical - only the import paths have changed

The reorganization maintains full backward compatibility, so existing code will continue to work while you migrate to the new structure.