ToolVet
61trust / 100

Json Validate

by JSON and Data Tools in Other

x402 APIPassing, checked 6 h ago

Check whether text is valid JSON; if not, return the error with line and column. If valid, report type, size and depth.

GET
https://json-data-tools.x402tookit.com/json-validate
Price
$0.02
per call in USDC
Uptime
64.3%
last 30 days
Response time
527 ms
687 ms slowest 5%
Last check
Passed
6 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 · Watch with other listings

How to call it

GET https://json-data-tools.x402tookit.com/json-validate

Each call costs $0.02 in USDC on Polygon, 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.

GET https://json-data-tools.x402tookit.com/json-validate?json=%7B%22a%22%3A+%5B1%2C+2%2C+%7B%22b%22%3A+null%7D%5D%7D

Parameters

ParameterTypeRequiredDescription
jsonstringYesThe JSON text, up to 4000 characters

Example response

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

{
  "asOf": "2026-10-11T04:24:44.928Z",
  "characters": 26,
  "degraded": false,
  "depth": 3,
  "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
  "notChecked": [
    "conformance to any JSON Schema",
    "duplicate keys (the last one silently wins)"
  ],
  "reasons": [],
  "source": "computed locally",
  "summary": "Valid JSON (object, 1 keys), depth 3.",
  "topLevelCount": 1,
  "type": "object",
  "verdict": "VALID"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.02.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://json-data-tools.x402tookit.com/json-validate?json=%7B%22a%22%3A+%5B1%2C+2%2C+%7B%22b%22%3A+null%7D%5D%7D'

# 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 - 'https://json-data-tools.x402tookit.com/json-validate?json=%7B%22a%22%3A+%5B1%2C+2%2C+%7B%22b%22%3A+null%7D%5D%7D' \
  | 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 $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
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 $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fjson-data-tools.x402tookit.com%2Fjson-validate
const res = await pay("https://json-data-tools.x402tookit.com/json-validate?json=%7B%22a%22%3A+%5B1%2C+2%2C+%7B%22b%22%3A+null%7D%5D%7D");
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 $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://json-data-tools.x402tookit.com/json-validate?json=%7B%22a%22%3A+%5B1%2C+2%2C+%7B%22b%22%3A+null%7D%5D%7D")
    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
6 h agoPassed402605 ms$0.02
19 h agoPassed402527 ms$0.02
2 days agoExpected HTTP 402, got 530530100 ms-
3 days agoExpected HTTP 402, got 530530114 ms-
5 days agoExpected HTTP 402, got 53053076 ms-
Show 9 older checks
5 days agoExpected HTTP 402, got 53053065 ms-
5 days agoExpected HTTP 402, got 530530174 ms-
5 days agoPassed402687 ms$0.02
5 days agoPassed402516 ms$0.02
6 days agoPassed402574 ms$0.02
6 days agoPassed402528 ms$0.02
6 days agoPassed402511 ms$0.02
6 days agoPassed402485 ms$0.02
7 days agoPassed402511 ms$0.02