mcp-image-tools

Version 8.0 — completely rewritten and revised.

Image tools for AI assistants: look at a picture, describe it, scale it, convert it, write one. Usable as a Python library or served over the Model Context Protocol.

• A picture arrives as a picture. read and resize answer with an image content block, not with a path or a base64 string.
• Large pictures are scaled down before they are handed out, to a longest edge of 1024 pixels unless the server or a call sets another limit.
• Server over stdio or streamable HTTP with the MCP SDK, protocol revision 2026-07-28, OAuth for HTTP.

Installation

Python 3.12 or later.

pip install mcp-image-tools            # the library
pip install "mcp-image-tools[server]"  # and the MCP server

Quick start

A client that starts the server itself, over stdio:

{
  "mcpServers": {
    "images": {
      "command": "mcp-image-tools",
      "args": ["--working-dir", "/home/you/pictures"]
    }
  }
}

Over HTTP, with OAuth:

MCP_OAUTH_ENABLED=true \
MCP_OAUTH_SERVER_URL=https://auth.example.org/ \
MCP_PUBLIC_URL=https://mcp.example.org/ \
mcp-image-tools --transport streamable-http --host 0.0.0.0 --port 12205 --path /images

As a library:

from pathlib import Path

from mcp_image_tools import Workspace, pictures

space = Workspace(working_dir=Path.cwd(), max_edge=800)
shown = pictures.read(space, "screenshot.png")
print(shown.image_format, shown.width, shown.height)

Tools

convert and write refuse data that is not a picture before anything is written. Transparency is laid on white where the target format cannot carry it.

Server options

Authentication over HTTP is configured with MCP_OAUTH_ENABLED, MCP_OAUTH_SERVER_URL, MCP_PUBLIC_URL and MCP_AUTH_METHOD; the server refuses to listen beyond this machine without it.

Development

Setup, checks, release steps and the rules the code keeps: doc/development.md. Changes are listed in CHANGES.md.

License

MIT, see LICENSE.