MiCompress

An MCP server that lets AI agents compress images, PDFs, video, audio, documents & archives. Powered by micompress.com.

Ask your assistant "compress the screenshots in ./assets" and it will — no manual upload, no separate tool. Works with any Model Context Protocol client: Claude Desktop, Claude Code, Cursor, and others.

Setup

Claude Code

claude mcp add micompress -- npx -y micompress-mcp

Claude Desktop / Cursor

Add to your MCP config (claude_desktop_config.json on Desktop):

{
  "mcpServers": {
    "micompress": {
      "command": "npx",
      "args": ["-y", "micompress-mcp"]
    }
  }
}

API key (optional)

Without a key the server works anonymously, within per-type size limits. For bigger files, sign in (free) at https://micompress.com/account, copy your personal key (mc_…) and pass it as the MICOMPRESS_API_KEY environment variable. The key stays in the server's environment — it is never sent to the model.

claude mcp add micompress -e MICOMPRESS_API_KEY=mc_yourkey -- npx -y micompress-mcp

{
  "mcpServers": {
    "micompress": {
      "command": "npx",
      "args": ["-y", "micompress-mcp"],
      "env": { "MICOMPRESS_API_KEY": "mc_yourkey" }
    }
  }
}

With a key, files up to 100 MB are accepted. A free account includes 50 compressions/month through the API; Plus ($9.99/mo) includes 1,000/month and Pro ($19.99/mo) 5,000/month, shared with website usage. When the allowance runs out the tool returns API_QUOTA_REACHED (free) or USAGE_LIMIT_REACHED (paid) — see https://micompress.com/plans.

Tools

compress_file

Compresses a file and writes the smaller version to disk.

Returns the size before and after, plus the output path. The file bytes are never returned to the model — only the summary, so a large file can't flood the context window.

list_supported_formats

Lists every accepted extension, grouped by category.

Supported formats

Full list: https://micompress.com/all-tools

How it works

Files are uploaded over HTTPS to micompress.com and compressed with the same engine the website uses (mozjpeg, pngquant, gifski, Ghostscript, ffmpeg, …), then written back to disk. Anonymous use works within per-type size limits (images 20MB, video 50MB, …); set MICOMPRESS_API_KEY for files up to 100MB.

Point it at files you're comfortable sending to a third-party service. The agent passes a path; the file's contents leave your machine.

Requirements

Node.js >= 18

License

MIT © MiCompress

_{Prefer a UI, or need bigger files? Use micompress.com.}