Image Favicon

{
  "final_url": "https://tanod.dev/icon.png",
  "html": "<link rel=\"icon\" href=\"/favicon.ico\" sizes=\"48x48\">\n<link rel=\"icon\" type=\"image/png\" sizes=\"32x32\" href=\"/favicon-32x32.png\">\n<link rel=\"apple-touch-icon\" sizes=\"180x180\" href=\"/apple-touch-icon.png\">\n<link rel=\"manifest\" href=\"/site.webmanifest\">",
  "images": [
    {
      "bytes": 2328,
      "content_type": "image/vnd.microsoft.icon",
      "data_base64": "AAABAAMAEBAAAAAA... (trimmed: 3,104 base64 characters in the reply)",
      "format": "ico",
      "height": 48,
      "name": "favicon.ico",
      "sizes": [
        16,
        32,
        48
      ],
      "width": 48
    },
    {
      "bytes": 700,
      "content_type": "image/png",
      "data_base64": "iVBORw0KGgoAAAAN... (trimmed: 936 base64 characters in the reply)",
      "format": "png",
      "height": 32,
      "name": "favicon-32x32.png",
      "width": 32
    },
    {
      "bytes": 4043,
      "content_type": "image/png",
      "data_base64": "iVBORw0KGgoAAAAN... (trimmed: 5,392 base64 characters in the reply)",
      "format": "png",
      "height": 180,
      "name": "apple-touch-icon.png",
      "width": 180
    },
    {
      "bytes": 5044,
      "content_type": "image/png",
      "data_base64": "iVBORw0KGgoAAAAN... (trimmed: 6,728 base64 characters in the reply)",
      "format": "png",
      "height": 192,
      "name": "icon-192.png",
      "width": 192
    },
    {
      "bytes": 20566,
      "content_type": "image/png",
      "data_base64": "iVBORw0KGgoAAAAN... (trimmed: 27,424 base64 characters in the reply)",
      "format": "png",
      "height": 512,
      "name": "icon-512.png",
      "width": 512
    }
  ],
  "input": {
    "animated": false,
    "bytes": 2183,
    "format": "png",
    "frames": 1,
    "has_alpha": true,
    "height": 256,
    "width": 256
  },
  "manifest_icons": [
    {
      "sizes": "192x192",
      "src": "/icon-192.png",
      "type": "image/png"
    },
    {
      "sizes": "512x512",
      "src": "/icon-512.png",
      "type": "image/png"
    }
  ],
  "notes": [
    "the source square is 256px: larger icons were upscaled"
  ],
  "operation": "favicon",
  "source": {
    "library": "Pillow",
    "license": "MIT-CMU (HPND)",
    "url": "https://python-pillow.org"
  },
  "source_url": "https://tanod.dev/icon.png",
  "total_bytes": 32681
}

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

# 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/favicon' \
  -H 'content-type: application/json' \
  --data-raw '{"url":"https://tanod.dev/icon.png"}' \
  | 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 $0.003 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.003" });
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 $0.003 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ftanod.dev%2Fv1%2Fimage%2Ffavicon&method=POST
const res = await pay("https://tanod.dev/v1/image/favicon", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "url": "https://tanod.dev/icon.png"
  }),
});
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 $0.003 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.003"})
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/favicon",
        json={
            "url": "https://tanod.dev/icon.png",
        },
    )
    print(res.status_code, res.text)