U Html Explicit Table Header Binding

{
  "billable": true,
  "findings": [
    {
      "confidence": 85,
      "evidence": [
        {
          "page_indices": [],
          "page_url": null,
          "pattern": "html-explicit-table-header-binding_scoped_evidence",
          "type": "raw_html"
        }
      ],
      "id": "html-explicit-table-header-binding",
      "limits": [
        "Only complete original RAM documents are examined. No additional fetch, execution, interaction, computed style, rendering or external state is asserted.",
        "Only numeric and boolean aggregates are returned. All source text, identifiers, names, addresses, contact data, URLs, headers and digest values remain private.",
        "Resolves only the explicit headers-attribute branch of the HTML table header-assignment algorithm: document-first ID, same-table cell membership, self exclusion, empty-cell exclusion and duplicate removal. The normative processing branch can resolve a td target as well as th; author conformance requiring th is not asserted.",
        "Cells without a headers attribute are counted but implicit positional, scope, row-group and column-group header assignment is outside this service. No accessibility, rendering or runtime behavior is inferred.",
        "Source: https://html.spec.whatwg.org/multipage/tables.html#header-and-data-cell-semantics"
      ],
      "module": "html-explicit-table-header-binding",
      "module_cpu_ms": 3,
      "state": "not_observed",
      "value": {
        "cells": 2,
        "documents": 1,
        "duplicate_references": 0,
        "empty_target_references": 0,
        "explicit_cells": 1,
        "resolved_relations": 1,
        "self_references": 0,
        "tables": 1,
        "token_references": 1,
        "unresolved_references": 0
      },
      "warnings": []
    }
  ],
  "known_count": 1,
  "scope": {
    "at": "2026-10-16T00:00:00Z",
    "contact_values_returned": false,
    "pages": 1,
    "rendered": false,
    "requests": 0
  },
  "warnings": [
    "Illustrative schema example; not a live measurement of the example URL."
  ]
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://detect.halowerk.com/u/html-explicit-table-header-binding' \
  -H 'content-type: application/json' \
  --data-raw '{"url":"https://example.org/"}'

# 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://detect.halowerk.com/u/html-explicit-table-header-binding' \
  -H 'content-type: application/json' \
  --data-raw '{"url":"https://example.org/"}' \
  | 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%2Fdetect.halowerk.com%2Fu%2Fhtml-explicit-table-header-binding&method=POST
const res = await pay("https://detect.halowerk.com/u/html-explicit-table-header-binding", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "url": "https://example.org/"
  }),
});
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://detect.halowerk.com/u/html-explicit-table-header-binding",
        json={
            "url": "https://example.org/",
        },
    )
    print(res.status_code, res.text)