Image Resize API

Resize images from URL -- custom width/height, format conversion (PNG/JPEG/WebP), aspect ratio preserved. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

{
  "mcpServers": {
    "image-resize": {
      "url": "https://image-resize.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

curl -X POST "https://image-resize.api.klymax402.com/api/resize" \
  -H "Content-Type: application/json" \
  -d '{"url":"https://example.com"}'
# -> 402 Payment Required, with an x402 payment challenge in the response body

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

Tool	Method	Path	Price	Description
media_resize_image	POST	/api/resize	$0.008	Resize an image from URL

media_resize_image

Use this when you need to resize an image from a URL or convert its format. Returns the resized image as base64 with metadata in JSON.

Parameters

Name	Type	Required	Description
url	string	yes	URL of the image to resize
width	number	no	Target width in pixels (maintains aspect ratio if height is omitted)
height	number	no	Target height in pixels (maintains aspect ratio if width is omitted)
format	string	no	Output format: 'png', 'jpeg', or 'webp' (default: png)

Example response:

{"image":"iVBORw0KGgo...","originalWidth":1920,"originalHeight":1080,"newWidth":800,"newHeight":450,"format":"webp","fileSizeBytes":24500}

When to use: creating thumbnails, optimizing images for web, preparing social media images, resizing for email templates, and batch image processing.

Not for: OCR text extraction (use media_extract_text_from_image), QR code generation (use utility_generate_qr_code), screenshots (use capture_screenshot).

Example agent prompts

• "Resize an image from a URL or convert its format"

Payment

• Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
• Network: Base L2 (eip155:8453)
• Asset: USDC
• Facilitator: Coinbase CDP (primary), PayAI (fallback)
• Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)

Part of klymax402

100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.

• Catalog: https://klymax402.com/llms.txt
• Full API reference: https://klymax402.com/llms-full.txt
• Live stats: https://klymax402.com/stats

License

MIT