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