---
title: cli
sidebarTitle: cli
---

# `fastmcp.utilities.cli`

## Functions

### `is_already_in_uv_subprocess` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/utilities/cli.py#L27" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
is_already_in_uv_subprocess() -> bool
```


Check if we're already running in a FastMCP uv subprocess.


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

```python
load_and_merge_config(server_spec: str | None, **cli_overrides) -> tuple[MCPServerConfig, str]
```


Load config from server_spec and apply CLI overrides.

This consolidates the config parsing logic that was duplicated across
run, inspect, and dev commands.

**Args:**
- `server_spec`: Python file, config file, URL, or None to auto-detect
- `cli_overrides`: CLI arguments that override config values

**Returns:**
- Tuple of (MCPServerConfig, resolved_server_spec)


### `log_server_banner` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/utilities/cli.py#L170" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
log_server_banner(server: FastMCP[Any], transport: Literal['stdio', 'http', 'sse', 'streamable-http']) -> None
```


Creates and logs a formatted banner with server information and logo.

**Args:**
- `transport`: The transport protocol being used
- `server_name`: Optional server name to display
- `host`: Host address (for HTTP transports)
- `port`: Port number (for HTTP transports)
- `path`: Server path (for HTTP transports)