Proxy Accessibility Check

{
  "data": {
    "accessibility_statement": {
      "found": false,
      "text": null,
      "url": null
    },
    "affected_elements": {
      "critical": 1,
      "minor": 0,
      "moderate": 0,
      "serious": 1
    },
    "checked_at": "2026-10-10T06:57:23.496Z",
    "engine": "axe-core 4.14.0 (MPL-2.0)",
    "grade": "B",
    "key_facts": [
      "2 kinds of WCAG A/AA violation on https://www.openstreetmap.org/#map=6/51.33/..."
    ],
    "lang": "de",
    "needs_manual_review": 3,
    "note": "Automated tests find roughly a third of accessibility barriers. A clean resul...",
    "score": 77,
    "standard": "WCAG 2.2 level A and AA rules that can be tested automatically (axe-core). EN...",
    "url": "https://www.openstreetmap.org/#map=6/51.33/10.45",
    "viewport": "desktop 1280x800",
    "violation_types": 2,
    "violations": [
      {
        "elements": 1,
        "examples": [
          {
            "fix": "Fix any of the following:\n  Element does not have inner text that is visible ...",
            "html": "<button class=\"btn btn-outline-primary dropdown-toggle dropdown-toggle-split ...",
            "target": ".dropdown-toggle-split"
          }
        ],
        "how_to_fix": "https://dequeuniversity.com/rules/axe/4.14/button-name?application=axeAPI",
        "impact": "critical",
        "problem": "Buttons must have discernible text",
        "rule": "button-name",
        "wcag": [
          "wcag2a"
        ]
      }
    ]
  },
  "success": true
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://agentsvc.io/api/v1/proxy/accessibility-check' \
  -H 'content-type: application/json' \
  --data-raw '{"url":"https://www.openstreetmap.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://agentsvc.io/api/v1/proxy/accessibility-check' \
  -H 'content-type: application/json' \
  --data-raw '{"url":"https://www.openstreetmap.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 $0.015 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.015" });
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 $0.015 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagentsvc.io%2Fapi%2Fv1%2Fproxy%2Faccessibility-check&method=POST
const res = await pay("https://agentsvc.io/api/v1/proxy/accessibility-check", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "url": "https://www.openstreetmap.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 $0.015 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.015"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://agentsvc.io/api/v1/proxy/accessibility-check",
        json={
            "url": "https://www.openstreetmap.org",
        },
    )
    print(res.status_code, res.text)