@glassypic/mcp-server

MCP server for GlassyPic. One tool that turns raw images into production-ready assets. Support upscaling, resizing/cropping, compression, file format conversion, and SEO filename & alt text generation. Just describe the outcome you want in natrual language.

Quick Start

Add to your MCP client config:

{
  "mcpServers": {
    "glassypic": {
      "command": "npx",
      "args": ["-y", "@glassypic/mcp-server@latest"]
    }
  }
}

No signup required. Works out of the box with 20 free daily credits.

Windows users: If the server doesn't appear after editing a JSON config, your client likely can't resolve npx from PATH (a common, silent failure). Wrap the command with cmd /c:

config.json

Copy

{
  "mcpServers": {
    "glassypic": {
      "command": "cmd",
      "args": ["/c", "npx", "-y", "@glassypic/mcp-server@latest"]
    }
  }
}

This applies to the hand-edited JSON configs below (Claude Desktop, Cursor, Windsurf, Cline). The CLI commands (Claude Code, Gemini CLI, Codex CLI) are unaffected.

Client-Specific Setup

{
  "mcpServers": {
    "glassypic": {
      "command": "npx",
      "args": ["-y", "@glassypic/mcp-server@latest"]
    }
  }
}

claude mcp add glassypic -- npx -y @glassypic/mcp-server@latest

{
  "mcpServers": {
    "glassypic": {
      "command": "npx",
      "args": ["-y", "@glassypic/mcp-server@latest"]
    }
  }
}

{
  "mcpServers": {
    "glassypic": {
      "command": "npx",
      "args": ["-y", "@glassypic/mcp-server@latest"]
    }
  }
}

{
  "mcpServers": {
    "glassypic": {
      "command": "npx",
      "args": ["-y", "@glassypic/mcp-server@latest"]
    }
  }
}

gemini mcp add --transport stdio glassypic npx -y @glassypic/mcp-server@latest

{
  "mcpServers": {
    "glassypic": {
      "command": "npx",
      "args": ["-y", "@glassypic/mcp-server@latest"]
    }
  }
}

codex mcp add glassypic -- npx -y @glassypic/mcp-server@latest

[mcp_servers.glassypic]
command = "npx"
args = ["-y", "@glassypic/mcp-server@latest"]

Tool: optimize_image

One tool that turns raw images into production-ready assets using AI-powered algorithm and multi-step agents (typically 60-80% size reduction), with optional resize, upscale, format conversion, and SEO metadata generation. Supports JPEG, PNG, WebP, HEIC, GIF, AVIF, TIFF, and BMP. Accepts absolute local file paths or remote URLs.

Parameters

Resize Behavior

Examples

Basic compression — just compress, keep format and dimensions:

{ "input": "/Users/me/photos/hero.png" }

Convert to WebP:

{ "input": "/Users/me/hero.png", "output_format": "webp" }

Resize proportionally — set one dimension, the other scales:

{ "input": "/Users/me/hero.png", "output_width_px": 1200 }

Exact dimensions with padding — white bars fill the gap:

{ "input": "/Users/me/hero.png", "output_width_px": 1080, "output_height_px": 1080 }

Exact dimensions with smart crop:

{ "input": "/Users/me/hero.png", "output_width_px": 1080, "output_height_px": 1080, "output_resize_behavior": "crop" }

AI upscale 4x:

{ "input": "/Users/me/icon.png", "output_upscale_factor": 4 }

From URL, save to directory:

{ "input": "https://example.com/photo.jpg", "output_path": "/Users/me/assets/" }

Skip SEO to save 1 credit:

{ "input": "/Users/me/hero.png", "output_seo_tag_gen": false }

Output

Returns a text summary and structured metadata:

Optimized: /Users/me/photos/modern-office-workspace.webp
Size: 142.3 KB
Compression: 73%
Format: webp
Dimensions: 1920x1080
Alt text: Modern office workspace with laptop and coffee cup on wooden desk

Structured output fields:

{
  "output_path": "/Users/me/photos/modern-office-workspace.webp",
  "output_size_bytes": 145715,
  "output_width_px": 1920,
  "output_height_px": 1080,
  "output_format": "webp",
  "compression_ratio": 0.27,
  "seo_alt_text": "Modern office workspace with laptop and coffee cup on wooden desk",
  "seo_keywords": ["office", "workspace", "laptop", "desk", "modern"],
  "seo_filename": "modern-office-workspace"
}

Supported Formats

GlassyPic supports high-quality conversion between any input and output format combination. Converting an animated GIF to a non-GIF format (JPG, PNG, WebP, AVIF) preserves only the first frame. Converting an animated GIF to a GIF format supports upscaling/resizing while preserving the animation and quality. You may also reduce animated GIF file size by decreasing the number of output frames.

Max upload file size: 50 MB.

SVG & ICO Examples

# Optimize an SVG file (keeps as vector)
Optimize logo.svg and keep it as SVG

# Convert SVG to raster
Convert icon.svg to a 512x512 PNG

# Trace raster to vector SVG
Convert my logo.png to a vector SVG

# Generate favicon set from any image
Convert logo.png to an ICO favicon

# Generate single-size ICO
Convert logo.png to a 32x32 ICO

# Extract largest icon from ICO
Convert favicon.ico to PNG

How It Works

Local file or URL
  → Upload to GlassyPic API
    → Smart compression (lossy, typically 60-80% reduction)
    → AI SEO tag generation (alt text, keywords, filename)
    → Optional: resize, upscale, format conversion
  → Download optimized file
    → Save with SEO filename slug (or .glassypic suffix if SEO disabled)

All processing happens server-side via the GlassyPic API. The MCP server is a thin client that orchestrates the pipeline.

Credits

Session data is stored locally at ~/.glassypic/session.json and persists across invocations.

Automatic upscaling