Website Evidence Pack

{
  "attribution": {
    "creator": "Python Software Foundation and documentation contributors",
    "licence": "PSF documentation licence",
    "licence_url": "https://docs.python.org/3/license.html",
    "modifications": "Fetched and converted to structured text; formatting simplified.",
    "source": "https://docs.python.org/3/",
    "title": "Python documentation"
  },
  "canonical": "https://docs.python.org/3/",
  "findings": [],
  "fingerprint": {
    "html_bytes": 48213,
    "html_sha256": "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
    "text_characters": 9120,
    "text_sha256": "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"
  },
  "limits": {
    "page_bytes": 262144
  },
  "links": {
    "count": 1,
    "external_count": 0,
    "items": [
      {
        "href": "https://docs.python.org/3/tutorial/",
        "text": "Tutorial"
      }
    ]
  },
  "markdown": "# Python documentation\n\nThe official documentation for the Python language.",
  "metadata": {
    "description": "The official Python documentation."
  },
  "observed_at": "2026-10-02T00:00:00.000Z",
  "replaces_calls": 6,
  "request_id": "example-request",
  "robots_directive": null,
  "service_id": "website_evidence_pack",
  "service_version": "1.0.0",
  "source_url": "https://docs.python.org/3/",
  "structured_data": {
    "block_count": 1,
    "blocks": [
      {
        "@type": "WebSite",
        "name": "Python documentation"
      }
    ],
    "types": [
      "WebSite"
    ]
  },
  "tables": {
    "count": 0,
    "items": []
  },
  "title": "Python documentation",
  "warnings": []
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.zfinia.com/x402/v1/website-evidence-pack' \
  -H 'content-type: application/json' \
  --data-raw '{"url":"https://docs.python.org/3/"}'

# 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://api.zfinia.com/x402/v1/website-evidence-pack' \
  -H 'content-type: application/json' \
  --data-raw '{"url":"https://docs.python.org/3/"}' \
  | 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 $0.05 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.05" });
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 $0.05 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.zfinia.com%2Fx402%2Fv1%2Fwebsite-evidence-pack&method=POST
const res = await pay("https://api.zfinia.com/x402/v1/website-evidence-pack", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "url": "https://docs.python.org/3/"
  }),
});
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 $0.05 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.05"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://api.zfinia.com/x402/v1/website-evidence-pack",
        json={
            "url": "https://docs.python.org/3/",
        },
    )
    print(res.status_code, res.text)