fastmcp/docs/python-sdk/fastmcp-settings.mdx
2025-12-01 13:51:48 -05:00

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---
title: settings
sidebarTitle: settings
---
# `fastmcp.settings`
## Classes
### `ExperimentalSettings` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/settings.py#L33" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
### `Settings` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/settings.py#L52" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
FastMCP settings.
**Methods:**
#### `get_setting` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/settings.py#L64" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
```python
get_setting(self, attr: str) -> Any
```
Get a setting. If the setting contains one or more `__`, it will be
treated as a nested setting.
#### `set_setting` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/settings.py#L77" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
```python
set_setting(self, attr: str, value: Any) -> None
```
Set a setting. If the setting contains one or more `__`, it will be
treated as a nested setting.
#### `settings` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/settings.py#L91" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
```python
settings(self) -> Self
```
This property is for backwards compatibility with FastMCP < 2.8.0,
which accessed fastmcp.settings.settings
#### `normalize_log_level` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/settings.py#L111" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
```python
normalize_log_level(cls, v)
```
#### `server_auth_class` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/settings.py#L313" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
```python
server_auth_class(self) -> AuthProvider | None
```