---
title: low_level
sidebarTitle: low_level
---
# `fastmcp.server.low_level`
## Classes
### `MiddlewareServerSession`
ServerSession that routes initialization requests through FastMCP middleware.
**Methods:**
#### `fastmcp`
```python
fastmcp(self) -> FastMCP
```
Get the FastMCP instance.
### `LowLevelServer`
**Methods:**
#### `fastmcp`
```python
fastmcp(self) -> FastMCP
```
Get the FastMCP instance.
#### `create_initialization_options`
```python
create_initialization_options(self, notification_options: NotificationOptions | None = None, experimental_capabilities: dict[str, dict[str, Any]] | None = None, **kwargs: Any) -> InitializationOptions
```
#### `run`
```python
run(self, read_stream: MemoryObjectReceiveStream[SessionMessage | Exception], write_stream: MemoryObjectSendStream[SessionMessage], initialization_options: InitializationOptions, raise_exceptions: bool = False, stateless: bool = False)
```
Overrides the run method to use the MiddlewareServerSession.
#### `read_resource`
```python
read_resource(self) -> Callable[[Callable[[AnyUrl], Awaitable[mcp.types.ReadResourceResult | mcp.types.CreateTaskResult]]], Callable[[AnyUrl], Awaitable[mcp.types.ReadResourceResult | mcp.types.CreateTaskResult]]]
```
Decorator for registering a read_resource handler with CreateTaskResult support.
The MCP SDK's read_resource decorator does not support returning CreateTaskResult
for background task execution. This decorator wraps the result in ServerResult.
This decorator can be removed once the MCP SDK adds native CreateTaskResult support
for resources.
#### `get_prompt`
```python
get_prompt(self) -> Callable[[Callable[[str, dict[str, Any] | None], Awaitable[mcp.types.GetPromptResult | mcp.types.CreateTaskResult]]], Callable[[str, dict[str, Any] | None], Awaitable[mcp.types.GetPromptResult | mcp.types.CreateTaskResult]]]
```
Decorator for registering a get_prompt handler with CreateTaskResult support.
The MCP SDK's get_prompt decorator does not support returning CreateTaskResult
for background task execution. This decorator wraps the result in ServerResult.
This decorator can be removed once the MCP SDK adds native CreateTaskResult support
for prompts.