ToolVet
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Bfsg Check

by BFSG Accessibility Quickcheck in Documents & files

x402 APIPassing, checked 4 h ago

Checks a web page for accessibility (a11y) problems from caller-supplied HTML: document language, title, image alt text, form labels, heading order, zoom, landmarks, link text, table headers, iframes, autocomplete. Anchored in the German accessibility act (BFSG), with the WCAG success criteria named per finding as a professional classification, not as a legal claim. States what a pattern parser cannot decide. Not legal advice.

POST
https://api.ozdreamtools.de/api/bfsg/check
Price
$0.1
per call in USDC
Uptime
95.5%
last 30 days
Response time
599 ms
727 ms slowest 5%
Last check
Passed
4 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed

How to call it

POST https://api.ozdreamtools.de/api/bfsg/check

Each call costs $0.1 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://api.ozdreamtools.de/api/bfsg/check
content-type: application/json

{
  "html": "<!doctype html><html lang=\"de\"><head><title>Beispiel</title></head><body><main><h1>Hallo</h1></main></body></html>"
}

Parameters

ParameterTypeRequiredDescription
htmlstringYesFull HTML of a representative page

Example response

The provider's example. We can't check it without paying.

Example response, 39 lines
{
  "checked_at": "2026-07-23T09:00:00.000Z",
  "criteria": [
    {
      "facts": {
        "lang": "de"
      },
      "key": "document_language",
      "status": "ok",
      "wcag": [
        "3.1.1"
      ]
    }
  ],
  "legal_basis": {
    "note": "…",
    "sources": [
      "https://www.gesetze-im-internet.de/bfsg/"
    ]
  },
  "not_applicable": [
    "table_headers"
  ],
  "not_machine_checkable": [
    {
      "topic": "Colour contrast",
      "wcag": [
        "1.4.3"
      ],
      "why": "…"
    }
  ],
  "not_measured": [],
  "score": {
    "hint": "…",
    "max": 18,
    "points": 14
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.1.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.ozdreamtools.de/api/bfsg/check' \
  -H 'content-type: application/json' \
  --data-raw '{"html":"<!doctype html><html lang=\"de\"><head><title>Beispiel<\/title><\/head><body><main><h1>Hallo<\/h1><\/main><\/body><\/html>"}'

# 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.ozdreamtools.de/api/bfsg/check' \
  -H 'content-type: application/json' \
  --data-raw '{"html":"<!doctype html><html lang=\"de\"><head><title>Beispiel<\/title><\/head><body><main><h1>Hallo<\/h1><\/main><\/body><\/html>"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// 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 $0.1 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.1" });
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 $0.1 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.ozdreamtools.de%2Fapi%2Fbfsg%2Fcheck&method=POST
const res = await pay("https://api.ozdreamtools.de/api/bfsg/check", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "html": "<!doctype html><html lang=\"de\"><head><title>Beispiel<\/title><\/head><body><main><h1>Hallo<\/h1><\/main><\/body><\/html>"
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# 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 $0.1 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.1"})
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.ozdreamtools.de/api/bfsg/check",
        json={
            "html": "<!doctype html><html lang=\"de\"><head><title>Beispiel</title></head><body><main><h1>Hallo</h1></main></body></html>",
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
4 h agoPassed402466 ms$0.1
8 h agoPassed402521 ms$0.1
13 h agoPassed402671 ms$0.1
17 h agoPassed402712 ms$0.1
20 h agoPassed402545 ms$0.1
Show 10 older checks
24 h agoPassed402622 ms$0.1
28 h agoPassed402613 ms$0.1
32 h agoPassed402785 ms$0.1
36 h agoTimed out---
39 h agoPassed402727 ms$0.1
43 h agoPassed402523 ms$0.1
47 h agoPassed402707 ms$0.1
2 days agoPassed402576 ms$0.1
2 days agoPassed402610 ms$0.1
2 days agoPassed402599 ms$0.1