ToolVet
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Readability

by German Readability Score in Search & web

x402 APIPassing, checked 1 h ago

Scores how readable a German text is: Flesch Reading Ease (Amstad adaptation) plus the four Wiener Sachtextformel variants. Returns both scores, the underlying counts (sentences, words, syllables, sentence length) and the formulas, so the result can be recomputed. Syllable counting is a disclosed approximation (vowel-group heuristic), not an official certification.

POST
https://api.ozdreamtools.de/api/readability
Price
$0.05
per call in USDC
Uptime
100%
last 30 days
Response time
584 ms
1.0 s slowest 5%
Last check
Passed
1 h ago, next any minute now

Run a free test callHow to call it

Reliability

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Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://api.ozdreamtools.de/api/readability

Each call costs $0.05 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/readability
content-type: application/json

{
  "text": "Dieser Satz ist kurz und klar. Er lässt sich leicht lesen."
}

Parameters

ParameterTypeRequiredDescription
textstringYesGerman text whose readability is to be measured

Example response

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

Example response, 27 lines
{
  "flesch_de": {
    "rating": "sehr leicht",
    "value": 94.9
  },
  "formulas": {
    "flesch_de": "180 − ASL − 58,5·ASW"
  },
  "metrics": {
    "asl": 5.5,
    "asw": 1.36,
    "es_percent": 55,
    "iw_percent": 18,
    "ms_percent": 9,
    "sentences": 2,
    "syllables": 15,
    "words": 11
  },
  "note": "…",
  "wiener_sachtextformel": {
    "rating": "sehr leicht (etwa 4. Schulstufe)",
    "wstf1": 2.8,
    "wstf2": 3.1,
    "wstf3": 2.4,
    "wstf4": 3
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.05.

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/readability' \
  -H 'content-type: application/json' \
  --data-raw '{"text":"Dieser Satz ist kurz und klar. Er l\u00e4sst sich leicht lesen."}'

# 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/readability' \
  -H 'content-type: application/json' \
  --data-raw '{"text":"Dieser Satz ist kurz und klar. Er l\u00e4sst sich leicht lesen."}' \
  | 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 $0.05 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.ozdreamtools.de%2Fapi%2Freadability&method=POST
const res = await pay("https://api.ozdreamtools.de/api/readability", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "text": "Dieser Satz ist kurz und klar. Er l\u00e4sst sich leicht lesen."
  }),
});
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 $0.05 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.ozdreamtools.de/api/readability",
        json={
            "text": "Dieser Satz ist kurz und klar. Er l\u00e4sst sich leicht lesen.",
        },
    )
    print(res.status_code, res.text)

Security scan

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