---
title: middleware
sidebarTitle: middleware
---

# `fastmcp.server.middleware.middleware`

## Functions

### `make_middleware_wrapper` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/middleware/middleware.py#L106" target="_blank">↗</a></sup>

```python
make_middleware_wrapper(middleware: Middleware, call_next: CallNext[T, R]) -> CallNext[T, R]
```


Create a wrapper that applies a single middleware to a context. The
closure bakes in the middleware and call_next function, so it can be
passed to other functions that expect a call_next function.


## Classes

### `CallNext` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/middleware/middleware.py#L36" target="_blank">↗</a></sup>

### `CallToolResult` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/middleware/middleware.py#L56" target="_blank">↗</a></sup>

### `ListToolsResult` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/middleware/middleware.py#L62" target="_blank">↗</a></sup>

### `ListResourcesResult` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/middleware/middleware.py#L67" target="_blank">↗</a></sup>

### `ListResourceTemplatesResult` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/middleware/middleware.py#L72" target="_blank">↗</a></sup>

### `ListPromptsResult` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/middleware/middleware.py#L77" target="_blank">↗</a></sup>

### `ServerResultProtocol` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/middleware/middleware.py#L82" target="_blank">↗</a></sup>

### `MiddlewareContext` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/middleware/middleware.py#L87" target="_blank">↗</a></sup>


Unified context for all middleware operations.


**Methods:**

#### `copy` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/middleware/middleware.py#L102" target="_blank">↗</a></sup>

```python
copy(self, **kwargs: Any) -> MiddlewareContext[T]
```

### `Middleware` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/middleware/middleware.py#L119" target="_blank">↗</a></sup>


Base class for FastMCP middleware with dispatching hooks.