Image Resize

{
  "bytes": 1386,
  "content_type": "image/png",
  "data_base64": "iVBORw0KGgoAAAAN... (trimmed: 1,848 base64 characters in the reply)",
  "final_url": "https://tanod.dev/icon.png",
  "format": "png",
  "height": 64,
  "input": {
    "animated": false,
    "bytes": 2183,
    "format": "png",
    "frames": 1,
    "has_alpha": true,
    "height": 256,
    "width": 256
  },
  "notes": [],
  "operation": "resize",
  "source": {
    "library": "Pillow",
    "license": "MIT-CMU (HPND)",
    "url": "https://python-pillow.org"
  },
  "source_url": "https://tanod.dev/icon.png",
  "upscale_prevented": false,
  "width": 64
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://tanod.dev/v1/image/resize' \
  -H 'content-type: application/json' \
  --data-raw '{"url":"https://tanod.dev/icon.png","width":64}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://tanod.dev/v1/image/resize' \
  -H 'content-type: application/json' \
  --data-raw '{"url":"https://tanod.dev/icon.png","width":64}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

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

// Pays at most $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ftanod.dev%2Fv1%2Fimage%2Fresize&method=POST
const res = await pay("https://tanod.dev/v1/image/resize", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "url": "https://tanod.dev/icon.png",
    "width": 64
  }),
});
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://tanod.dev/v1/image/resize",
        json={
            "url": "https://tanod.dev/icon.png",
            "width": 64,
        },
    )
    print(res.status_code, res.text)