Image crop

Crop an image to a pixel box, and/or rotate (90/180/270) and flip it - applied in that order. Send POST /api/image-crop with no required fields (11 optional) and pay $0.002 per call over x402 or MPP (there is no free tier). It returns a JSON object with dataUri, width, height and bytes.

Send a public image URL or a base64 image. Returns the result as binary, or as a JSON data URI with dataUri:true. Deterministic.

Category: Web & documents · Tags: image crop rotate flip transform

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Parameters

Example request

curl -i -X POST https://agent402.tools/api/image-crop \
  -H "Content-Type: application/json" \
  -d '{"url":"https://agent402.tools/fixtures/sample-photo.jpg","left":10,"top":10,"width":60,"height":40,"dataUri":true}'

Without payment this returns HTTP 402 Payment Required with the exact price for image-crop; any x402 v2 or MPP client pays it and retries.

Example response

{
  "dataUri": "data:image/png;base64,iVBORw0KG…",
  "width": 60,
  "height": 40,
  "bytes": 144
}

From an MCP client

catalog.call {
  "slug": "image-crop",
  "params": {
    "url": "https://agent402.tools/fixtures/sample-photo.jpg",
    "left": 10,
    "top": 10,
    "width": 60,
    "height": 40,
    "dataUri": true
  }
}

The hosted connector at https://agent402.tools/mcp needs a payment for image-crop; the stdio package pays it from a wallet or from AGENT402_CREDITS_KEY. Local install: npx -y agent402-mcp.

Errors and behavior

• Every field is optional. An input the tool rejects returns an HTTP 4xx whose body carries error, tool, expected, required and example.
• A paid call that ends in any status of 400 or above is not charged over x402, MPP or a prepaid credits key: settlement is cancelled when the tool fails. The exception is a Tempo push credential, a transfer the buyer sent before the call: it settles before the tool runs, so if the tool then fails the payment is recorded as a refund owed to the paying wallet.
• Wallet-only: this tool reaches the network or stored state, so it has no proof-of-work tier. A prepaid card-credits key issued earlier (Authorization: Bearer a402_...) also pays it.
• A GET or HEAD to /api/image-crop returns the same 402 quote, so the price can be read without a body.
• An Idempotency-Key header makes a retried paid call replay the first 200 instead of charging again (an answer larger than 1 MB is not replayed).

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
client.setSpendControls?.(false); // keep your own spending ceiling in code
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/image-crop", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "url": "https://agent402.tools/fixtures/sample-photo.jpg",
    "left": 10,
    "top": 10,
    "width": 60,
    "height": 40,
    "dataUri": true
  }),
});

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