Image Metadata Server

MCP server for extracting rich metadata from images, monetized via x402 payments.

Live Demo

Server: https://mcp-image-metadata.onrender.com

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Quick Start

1. Upload Image

curl -X POST https://mcp-image-metadata.onrender.com/upload \
  -F "[email protected]"

Response:

{
  "success": true,
  "filePath": "/tmp/uploads/abc123.jpg",
  "fileName": "abc123.jpg",
  "originalName": "your-image.jpg",
  "size": 12345
}

2. Extract Metadata

curl -X POST https://mcp-image-metadata.onrender.com/mcp \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "extract_image_metadata",
      "arguments": {
        "imageUrl": "/tmp/uploads/abc123.jpg",
        "payer": "0xYourWalletAddress"
      }
    }
  }'

Response:

{
  "success": true,
  "data": {
    "file": {
      "width": 1920,
      "height": 1080,
      "format": "jpeg",
      "colorDepth": 3,
      "dpi": 72,
      "fileSize": 456789,
      "mimeType": "image/jpeg"
    },
    "exif": {
      "cameraMake": "Apple",
      "cameraModel": "iPhone 14 Pro",
      "dateTime": "2024:01:15 12:30:00"
    },
    "gps": {
      "latitude": 37.7749,
      "longitude": -122.4194
    }
  },
  "price": 0.002,
  "paymentStatus": "free",
  "freemiumRemaining": 49
}

---

API Endpoints

Endpoint	Method	Description
/mcp	POST	MCP JSON-RPC interface
/upload	POST	Upload image file
/health	GET	Health check

---

MCP Tools

1. extract_image_metadata

Extract EXIF, GPS, IPTC, XMP metadata from an image.

Arguments:

{
  "imageUrl": "/tmp/uploads/abc123.jpg",
  "includeOptions": {
    "includeGps": true,
    "includeColor": true,
    "includeThumbnail": false,
    "includeOcr": false,
    "includeDeepHash": false
  },
  "paymentHeader": "...",
  "payer": "0xYourWallet"
}

Response:

{
  "success": true,
  "data": { "file": {...}, "exif": {...}, "gps": {...} },
  "price": 0.002,
  "paymentStatus": "free",
  "freemiumRemaining": 50
}

---

2. extract_batch_metadata

Extract metadata from multiple images (max 50).

Arguments:

{
  "imageUrls": ["/tmp/uploads/1.jpg", "/tmp/uploads/2.jpg"],
  "options": { "includeGps": true },
  "paymentHeader": "...",
  "payer": "0xYourWallet"
}

---

3. detect_image_manipulation

Analyze image for signs of manipulation/editing.

Arguments:

{
  "imageUrl": "/tmp/uploads/abc123.jpg",
  "analysisLevel": "standard",
  "paymentHeader": "...",
  "payer": "0xYourWallet"
}

analysisLevel:

• basic - Basic checks ($0.002)
• standard - Standard analysis ($0.002)
• forensic - Deep forensic analysis ($0.015)

---

4. get_pricing

Get current pricing tiers and freemium status.

Arguments:

{
  "payer": "0xYourWallet"
}

Response:

{
  "pricing": {
    "basic": { "tier": "basic", "price": 0.001 },
    "standard": { "tier": "standard", "price": 0.002 },
    "premium": { "tier": "premium", "price": 0.005 },
    "forensic": { "tier": "forensic", "price": 0.015 }
  },
  "freemium": { "limit": 50, "remaining": 49 }
}

---

Complete Usage Flow

Step 1: Upload Image

# Upload image
curl -X POST https://mcp-image-metadata.onrender.com/upload \
  -F "[email protected]"

Response:

{
  "success": true,
  "filePath": "/tmp/uploads/abc123.jpg"
}

Step 2: Extract Metadata

curl -X POST https://mcp-image-metadata.onrender.com/mcp \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "extract_image_metadata",
      "arguments": {
        "imageUrl": "/tmp/uploads/abc123.jpg",
        "payer": "0xYourWallet123"
      }
    }
  }'

Step 3: Get Updated Freemium Status

curl -X POST https://mcp-image-metadata.onrender.com/mcp \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 2,
    "method": "tools/call",
    "params": {
      "name": "get_pricing",
      "arguments": {
        "payer": "0xYourWallet123"
      }
    }
  }'

---

Pricing

Tier	Price	Description
Basic	$0.001 USDC	File info, dimensions, color profile
Standard	$0.002 USDC	Basic + GPS, IPTC, XMP
Premium	$0.005 USDC	Standard + thumbnail, deep hash
Forensic	$0.015 USDC	Premium + manipulation analysis

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Freemium

• 50 free requests per wallet address
• After 50, requires x402 payment
• Usage tracked in memory (resets on server restart)

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x402 Payment Integration

For Agents/Apps

To make paid requests, include the paymentHeader:

{
  "name": "extract_image_metadata",
  "arguments": {
    "imageUrl": "/tmp/uploads/abc123.jpg",
    "payer": "0xYourWallet",
    "paymentHeader": "payment=v1_USDC_..."
  }
}

Payment Flow

1. Agent calls tool with x402 payment header
2. Server verifies payment via xpay facilitator
3. If valid → returns metadata
4. If invalid → returns error
5. USDC transfers to your wallet on Base

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Deployment

Render (Recommended)

1. Push to GitHub
2. Go to render.com → New → Web Service
3. Connect your repo
4. Configure:

Setting	Value
Name	mcp-image-metadata
Region	Oregon
Build Command	npm install && npm run build
Start Command	node dist/index.js

5. Add Environment Variables (see above)
6. Deploy

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Local Development

# Install dependencies
npm install

# Build
npm run build

# Run (stdio mode)
npm run dev

# Run with HTTP server
PORT=3000 node dist/index.js

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Supported Image Formats

• JPEG/JPG
• PNG
• GIF
• WebP
• TIFF
• HEIC
• BMP
• SVG

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Tech Stack

• Node.js 20+
• TypeScript
• @modelcontextprotocol/sdk ^1.29.0
• Sharp (image processing)
• ExifReader (metadata parsing)
• Express (HTTP server)
• Multer (file uploads)

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Security

This server implements multiple security measures:

• Path Traversal Protection: File paths are validated to prevent directory traversal attacks
• MIME Type Validation: Uploaded files are validated against allowed image types
• Input Validation: Zod schemas reject path traversal patterns in user input
• Error Sanitization: Error messages are sanitized to prevent information leakage
• Rate Limiting: HTTP endpoints are protected with rate limiting (100 req/min per IP)
• CORS Configuration: Optional origin validation for cross-origin requests
• Security Logging: Security-relevant events are logged for monitoring

Security Configuration

# Optional: comma-separated list of allowed origins
ALLOWED_ORIGINS=https://example.com,https://app.example.com

# Optional: rate limit window in milliseconds (default: 60000)
RATE_LIMIT_WINDOW=60000

# Optional: max requests per window per IP (default: 100)
RATE_LIMIT_MAX=100

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License

MIT