---
title: http
sidebarTitle: http
---

# `fastmcp.server.http`

## Functions

### `set_http_request` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/http.py#L77" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
set_http_request(request: Request) -> Generator[Request, None, None]
```

### `create_base_app` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/http.py#L110" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
create_base_app(routes: list[BaseRoute], middleware: list[Middleware], debug: bool = False, lifespan: Callable | None = None) -> StarletteWithLifespan
```


Create a base Starlette app with common middleware and routes.

**Args:**
- `routes`: List of routes to include in the app
- `middleware`: List of middleware to include in the app
- `debug`: Whether to enable debug mode
- `lifespan`: Optional lifespan manager for the app

**Returns:**
- A Starlette application


### `create_sse_app` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/http.py#L139" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
create_sse_app(server: FastMCP[LifespanResultT], message_path: str, sse_path: str, auth: AuthProvider | None = None, debug: bool = False, routes: list[BaseRoute] | None = None, middleware: list[Middleware] | None = None) -> StarletteWithLifespan
```


Return an instance of the SSE server app.

**Args:**
- `server`: The FastMCP server instance
- `message_path`: Path for SSE messages
- `sse_path`: Path for SSE connections
- `auth`: Optional authentication provider (AuthProvider)
- `debug`: Whether to enable debug mode
- `routes`: Optional list of custom routes
- `middleware`: Optional list of middleware

Returns:
    A Starlette application with RequestContextMiddleware


### `create_streamable_http_app` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/http.py#L266" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
create_streamable_http_app(server: FastMCP[LifespanResultT], streamable_http_path: str, event_store: EventStore | None = None, retry_interval: int | None = None, auth: AuthProvider | None = None, json_response: bool = False, stateless_http: bool = False, debug: bool = False, routes: list[BaseRoute] | None = None, middleware: list[Middleware] | None = None) -> StarletteWithLifespan
```


Return an instance of the StreamableHTTP server app.

**Args:**
- `server`: The FastMCP server instance
- `streamable_http_path`: Path for StreamableHTTP connections
- `event_store`: Optional event store for SSE polling/resumability
- `retry_interval`: Optional retry interval in milliseconds for SSE polling.
Controls how quickly clients should reconnect after server-initiated
disconnections. Requires event_store to be set. Defaults to SDK default.
- `auth`: Optional authentication provider (AuthProvider)
- `json_response`: Whether to use JSON response format
- `stateless_http`: Whether to use stateless mode (new transport per request)
- `debug`: Whether to enable debug mode
- `routes`: Optional list of custom routes
- `middleware`: Optional list of middleware

**Returns:**
- A Starlette application with StreamableHTTP support


## Classes

### `StreamableHTTPASGIApp` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/http.py#L32" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>


ASGI application wrapper for Streamable HTTP server transport.


### `StarletteWithLifespan` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/http.py#L70" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

**Methods:**

#### `lifespan` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/http.py#L72" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
lifespan(self) -> Lifespan[Starlette]
```

### `RequestContextMiddleware` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/http.py#L85" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>


Middleware that stores each request in a ContextVar and sets transport type.

