mcp-base64

mcp-base64

Provides tools to encode files to Base64 strings and decode Base64 content back to files, supporting both text and binary formats.

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MCP Base64 Server

A Python MCP (Model Context Protocol) server for Base64 file conversion with stdio transport.

Features

  • encode_file_to_base64: Encode any file to base64 string
  • decode_base64_to_file: Decode base64 content to file
  • Binary-safe: Handles both text and binary files correctly

Usage

IDE Configuration

For IDE plugins, add this server to your MCP configuration JSON:

{
  "mcpServers": {
    "base64": {
      "command": "uvx",
      "args": [
        "mcp-base64"
      ]
    }
  }
}

Direct Execution

git clone https://github.com/Wuodan/mcp-base64.git
cd mcp-base64
python3 -m venv .venv
./.venv/bin/python -m pip install -e .
./.venv/bin/python -m mcp_base64.server

Tools

encode_file_to_base64(file_path: str) -> str

Encodes a file to base64 string.

Parameters:

  • file_path (str): Absolute path to file to encode

Returns: Base64 encoded string

decode_base64_to_file(base64_content: str, file_path: str) -> str

Decodes base64 string to file.

Parameters:

  • base64_content (str): Base64 encoded content
  • file_path (str): Absolute path where to save decoded file

Returns: Success message with file path

Development

Install development dependencies:

./.venv/bin/python -m pip install -r requirements-dev.txt -e .

Run tests:

./.venv/bin/python -m pytest -q

Run linting:

./scripts/lint.sh

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