Extract Url Preview

{
  "results": [
    {
      "data": {
        "description": "",
        "favicons": [],
        "minifetchCache": {
          "cachedAt": "",
          "expiresAt": "",
          "hit": false
        },
        "og:description": "",
        "og:image": "",
        "og:site_name": "",
        "og:title": "",
        "og:type": "",
        "og:url": "",
        "proxy": {
          "proxyType": "",
          "proxyUrl": null,
          "robotsTxt": {
            "allowed": false
          },
          "userAgent": ""
        },
        "requestUrl": "",
        "title": "",
        "twitter:card": "",
        "twitter:image": "",
        "twitter:title": "",
        "url": ""
      }
    }
  ],
  "success": true
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://minifetch.com/api/v1/x402/extract/url-preview?url=https%3A%2F%2Fgithub.com'

# 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 - 'https://minifetch.com/api/v1/x402/extract/url-preview?url=https%3A%2F%2Fgithub.com' \
  | 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 $0.001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.001" });
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 $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fminifetch.com%2Fapi%2Fv1%2Fx402%2Fextract%2Furl-preview
const res = await pay("https://minifetch.com/api/v1/x402/extract/url-preview?url=https%3A%2F%2Fgithub.com");
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 $0.001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.001"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://minifetch.com/api/v1/x402/extract/url-preview?url=https%3A%2F%2Fgithub.com")
    print(res.status_code, res.text)