---
title: "Formatters"
description: "Log formatters for MCP servers API Documentation"
icon: "code"
github: "https://github.com/mcp-use/mcp-use/blob/main/libraries/python/mcp_use/server/logging/formatters.py"
---

import {RandomGradientBackground} from "/snippets/gradient.jsx"

<Callout type="info" title="Source Code">
View the source code for this module on GitHub: <a href='https://github.com/mcp-use/mcp-use/blob/main/libraries/python/mcp_use/server/logging/formatters.py' target='_blank' rel='noopener noreferrer'>https://github.com/mcp-use/mcp-use/blob/main/libraries/python/mcp_use/server/logging/formatters.py</a>
</Callout>

Log formatters for MCP servers.

## ColoredFormatter

<div>
<RandomGradientBackground className="rounded-lg p-4 w-full h-full rounded-full">
<div className="text-black">
<div className="text-black font-bold text-xl mb-2 mt-8"><code className="!text-black">class</code> ColoredFormatter</div>

Custom formatter with ANSI color codes.

</div>
</RandomGradientBackground>
```python
from mcp_use.server.logging.formatters import ColoredFormatter
```

<Card type="info">
### `method` __init__

**Parameters**
><ParamField body="fmt" default="None" >   Parameter value </ParamField>
><ParamField body="datefmt" default="None" >   Parameter value </ParamField>

**Signature**
```python wrap
def __init__(fmt = None, datefmt = None):
```

</Card>
</div>

## MCPAccessFormatter

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<div className="text-black">
<div className="text-black font-bold text-xl mb-2 mt-8"><code className="!text-black">class</code> MCPAccessFormatter</div>

Enhanced Uvicorn access formatter that shows MCP method information.

    For MCP requests, enhances the log with JSON-RPC method info from thread-local storage.

</div>
</RandomGradientBackground>
```python
from mcp_use.server.logging.formatters import MCPAccessFormatter
```

<Card type="info">
### `method` __init__

**Parameters**
><ParamField body="kwargs" required="True" >   Parameter value </ParamField>

**Signature**
```python wrap
def __init__(kwargs):
```

</Card>
</div>

## MCPErrorFormatter

<div>
<RandomGradientBackground className="rounded-lg p-4 w-full h-full rounded-full">
<div className="text-black">
<div className="text-black font-bold text-xl mb-2 mt-8"><code className="!text-black">class</code> MCPErrorFormatter</div>

Custom error formatter with helpful messages.

</div>
</RandomGradientBackground>
```python
from mcp_use.server.logging.formatters import MCPErrorFormatter
```

<Card type="info">
### `method` __init__

Initialize the formatter with specified format strings.

        Initialize the formatter either with the specified format string, or a
        default as described above. Allow for specialized date formatting with
        the optional datefmt argument. If datefmt is omitted, you get an
        ISO8601-like (or RFC 3339-like) format.

        Use a style parameter of '%', '\{' or '$' to specify that you want to
        use one of %-formatting, :meth:`str.format` (``\{\}``) formatting or
        :class:`string.Template` formatting in your format string.

        .. versionchanged:: 3.2
           Added the ``style`` parameter.

**Parameters**
><ParamField body="fmt" default="None" >   Parameter value </ParamField>
><ParamField body="datefmt" default="None" >   Parameter value </ParamField>
><ParamField body="style" default='%' >   Parameter value </ParamField>
><ParamField body="validate" default="True" >   Parameter value </ParamField>
><ParamField body="defaults" default="None" >   Parameter value </ParamField>

**Signature**
```python wrap
def __init__(fmt = None, datefmt = None, style = "%", validate = True, defaults = None):
```

</Card>
</div>

## UvicornAccessArgs

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<RandomGradientBackground className="rounded-lg p-4 w-full h-full rounded-full">
<div className="text-black">
<div className="text-black font-bold text-xl mb-2 mt-8"><code className="!text-black">class</code> UvicornAccessArgs</div>

Uvicorn access logs use a tuple format: (client_addr, method, path, ...).

    This class provides named access to make the code more readable.
    See: https://github.com/encode/uvicorn/blob/master/uvicorn/logging.py

</div>
</RandomGradientBackground>
```python
from mcp_use.server.logging.formatters import UvicornAccessArgs
```

<Card type="info">
**Attributes**
>
<ParamField body="client_addr" type="str" required="True" >   MCP client instance </ParamField>
<ParamField body="method" type="str" required="True" >   String value </ParamField>
<ParamField body="path" type="str" required="True" >   File path </ParamField>

</Card>

<Card type="info">
### `method` __init__

**Parameters**
><ParamField body="client_addr" type="str" required="True" >   MCP client instance </ParamField>
><ParamField body="method" type="str" required="True" >   String value </ParamField>
><ParamField body="path" type="str" required="True" >   File path </ParamField>
><ParamField body="extra" type="tuple" required="True" >   Parameter value </ParamField>

**Signature**
```python wrap
def __init__(client_addr: str, method: str, path: str, extra: tuple):
```

</Card>
<Card type="info">
### `method` is_mcp_request

Check if this is a POST request to the MCP endpoint.


**Parameters**
><ParamField body="mcp_path" type="str" default='/mcp' >   File path </ParamField>

**Returns**
><ResponseField name="returns" type="bool" />

**Signature**
```python wrap
def is_mcp_request(mcp_path: str = "/mcp"):
```

</Card>

<Card type="info">
### `method` to_tuple

Convert back to tuple format for Uvicorn's formatter.


**Parameters**
><ParamField body="path_override" type="str | None" default="None" >   File path </ParamField>
><ParamField body="method_override" type="str | None" default="None" >   String value </ParamField>

**Returns**
><ResponseField name="returns" type="tuple" />

**Signature**
```python wrap
def to_tuple(path_override: str | None = None, method_override: str | None = None):
```

</Card>

</div>
