> ## Documentation Index
> Fetch the complete documentation index at: https://fastmcp-docs-v3-beta2-feature-tracking.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# timing

# `fastmcp.server.middleware.timing`

Timing middleware for measuring and logging request performance.

## Classes

### `TimingMiddleware` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/middleware/timing.py#L10" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

Middleware that logs the execution time of requests.

Only measures and logs timing for request messages (not notifications).
Provides insights into performance characteristics of your MCP server.

**Methods:**

#### `on_request` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/middleware/timing.py#L39" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python theme={null}
on_request(self, context: MiddlewareContext, call_next: CallNext) -> Any
```

Time request execution and log the results.

### `DetailedTimingMiddleware` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/middleware/timing.py#L60" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

Enhanced timing middleware with per-operation breakdowns.

Provides detailed timing information for different types of MCP operations,
allowing you to identify performance bottlenecks in specific operations.

**Methods:**

#### `on_call_tool` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/middleware/timing.py#L111" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python theme={null}
on_call_tool(self, context: MiddlewareContext, call_next: CallNext) -> Any
```

Time tool execution.

#### `on_read_resource` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/middleware/timing.py#L118" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python theme={null}
on_read_resource(self, context: MiddlewareContext, call_next: CallNext) -> Any
```

Time resource reading.

#### `on_get_prompt` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/middleware/timing.py#L127" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python theme={null}
on_get_prompt(self, context: MiddlewareContext, call_next: CallNext) -> Any
```

Time prompt retrieval.

#### `on_list_tools` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/middleware/timing.py#L134" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python theme={null}
on_list_tools(self, context: MiddlewareContext, call_next: CallNext) -> Any
```

Time tool listing.

#### `on_list_resources` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/middleware/timing.py#L140" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python theme={null}
on_list_resources(self, context: MiddlewareContext, call_next: CallNext) -> Any
```

Time resource listing.

#### `on_list_resource_templates` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/middleware/timing.py#L146" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python theme={null}
on_list_resource_templates(self, context: MiddlewareContext, call_next: CallNext) -> Any
```

Time resource template listing.

#### `on_list_prompts` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/middleware/timing.py#L152" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python theme={null}
on_list_prompts(self, context: MiddlewareContext, call_next: CallNext) -> Any
```

Time prompt listing.