TinyPNG MCP server

The MCP Server for TinyPNG provides image compression capabilities through the TinyPNG API, allowing you to compress both local and remote images easily. This server integrates with Model Context Protocol (MCP) clients to provide optimized image compression tools.

Installation

Manual Installation

1. Install dependencies and build the project:

pnpm i
pnpm build

2. Edit your mcp.json file to include the TinyPNG server configuration:

{
  "mcpServers": {
    "tinypng": {
      "command": "bun", 
      "args": ["/path/to/tinypng-mcp-server/src/index.ts"],
      "env": {
        "TINYPNG_API_KEY": "your-tinypng-api-key"
      }
    }
  }
}

Note: You can use node instead of bun as the command. If using Node.js, change the args value to "dist/index.js".

Automatic Installation via Smithery

To install the TinyPNG MCP Server automatically for Claude Desktop:

npx -y @smithery/cli install @aiyogg/tinypng-mcp-server --client claude

Using the TinyPNG MCP Server

The server provides two main tools for image compression:

Compressing Local Images

This tool allows you to compress images stored on your local file system:

{
  name: 'compress_local_image',
  description: 'Compress a local image file',
  inputSchema: {
    type: 'object',
    properties: {
      imagePath: {
        type: 'string',
        description: 'The ABSOLUTE path to the image file to compress',
        example: '/Users/user/Downloads/image.jpg',
      },
      outputPath: {
        type: 'string',
        description: 'The ABSOLUTE path to save the compressed image file',
        example: '/Users/user/Downloads/image_compressed.jpg',
      },
      outputFormat: {
        type: 'string',
        description: 'The format to save the compressed image file',
        example: 'image/jpeg',
      },
    },
    required: ['imagePath'],
  },
}

Compressing Remote Images

This tool enables you to compress images from URLs:

{
  name: 'compress_remote_image',
  description: 'Compress a remote image file by giving the URL of the image',
  inputSchema: {
    type: 'object',
    properties: {
      imageUrl: {
        type: 'string',
        description: 'The URL of the image file to compress',
        example: 'https://example.com/image.jpg',
      },
      outputPath: {
        type: 'string',
        description: 'The ABSOLUTE path to save the compressed image file',
        example: '/Users/user/Downloads/image_compressed.jpg',
      },
      outputFormat: {
        type: 'string',
        description: 'The format to save the compressed image file',
        example: 'image/jpeg',
      },
    },
    required: ['imageUrl'],
  },
}

Important Configuration Notes

• You must provide your TinyPNG API key in the server configuration.
• When specifying file paths, always use absolute paths rather than relative ones.
• The output format is optional, but when specified, should be a valid MIME type (e.g., 'image/jpeg', 'image/png').

How to install this MCP server

For Claude Code

To add this MCP server to Claude Code, run this command in your terminal:

claude mcp add-json "tinypng" '{"command":"bun","args":["/path/to/tinypng-mcp-server/src/index.ts"],"env":{"TINYPNG_API_KEY":"your-tinypng-api-key"}}'

See the official Claude Code MCP documentation for more details.

For Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > Tools & Integrations and click "New MCP Server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

{
    "mcpServers": {
        "tinypng": {
            "command": "bun",
            "args": [
                "/path/to/tinypng-mcp-server/src/index.ts"
            ],
            "env": {
                "TINYPNG_API_KEY": "your-tinypng-api-key"
            }
        }
    }
}

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explicitly ask the agent to use the tool by mentioning the tool name and describing what the function does.

For Claude Desktop

To add this MCP server to Claude Desktop:

1. Find your configuration file:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json
• Linux: ~/.config/Claude/claude_desktop_config.json

2. Add this to your configuration file:

{
    "mcpServers": {
        "tinypng": {
            "command": "bun",
            "args": [
                "/path/to/tinypng-mcp-server/src/index.ts"
            ],
            "env": {
                "TINYPNG_API_KEY": "your-tinypng-api-key"
            }
        }
    }
}

3. Restart Claude Desktop for the changes to take effect