ToolVet
77trust / 100

Instant Json Schema Verifier Call

by hcrb.in in Other

x402 APIPassing, checked 16 min ago

Validate JSON data payloads against schema definitions. Preflighted for agent tool call pipelines.

POST
https://hcrb.in/v1/tools/instant-json-schema-verifier/call
Price
$0.005
per call in USDC
Uptime
100%
last 30 days
Response time
416 ms
652 ms slowest 5%
Last check
Passed
16 min ago, next in 11 min

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

POST https://hcrb.in/v1/tools/instant-json-schema-verifier/call

Each call costs $0.005 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://hcrb.in/v1/tools/instant-json-schema-verifier/call
content-type: application/json

{
  "input": {
    "data": {
      "name": "Apex Agent",
      "version": 2
    },
    "schema": {
      "properties": {
        "name": {
          "type": "string"
        },
        "version": {
          "type": "number"
        }
      },
      "required": [
        "name",
        "version"
      ]
    }
  }
}

Parameters

ParameterTypeRequiredDescription
inputobjectYes

Example response

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

{
  "errors": [],
  "execution_ms": 0,
  "valid": true
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.005.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://hcrb.in/v1/tools/instant-json-schema-verifier/call' \
  -H 'content-type: application/json' \
  --data-raw '{"input":{"data":{"name":"Apex Agent","version":2},"schema":{"properties":{"name":{"type":"string"},"version":{"type":"number"}},"required":["name","version"]}}}'

# 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://hcrb.in/v1/tools/instant-json-schema-verifier/call' \
  -H 'content-type: application/json' \
  --data-raw '{"input":{"data":{"name":"Apex Agent","version":2},"schema":{"properties":{"name":{"type":"string"},"version":{"type":"number"}},"required":["name","version"]}}}' \
  | 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 $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
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 $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fhcrb.in%2Fv1%2Ftools%2Finstant-json-schema-verifier%2Fcall&method=POST
const res = await pay("https://hcrb.in/v1/tools/instant-json-schema-verifier/call", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "input": {
      "data": {
        "name": "Apex Agent",
        "version": 2
      },
      "schema": {
        "properties": {
          "name": {
            "type": "string"
          },
          "version": {
            "type": "number"
          }
        },
        "required": [
          "name",
          "version"
        ]
      }
    }
  }),
});
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 $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://hcrb.in/v1/tools/instant-json-schema-verifier/call",
        json={
            "input": {
                "data": {
                    "name": "Apex Agent",
                    "version": 2,
                },
                "schema": {
                    "properties": {
                        "name": {
                            "type": "string",
                        },
                        "version": {
                            "type": "number",
                        },
                    },
                    "required": [
                        "name",
                        "version",
                    ],
                },
            },
        },
    )
    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
16 min agoPassed402220 ms$0.005
5 h agoPassed402377 ms$0.005
11 h agoPassed402456 ms$0.005
16 h agoPassed402338 ms$0.005
20 h agoPassed402190 ms$0.005
Show 8 older checks
25 h agoPassed402420 ms$0.005
30 h agoPassed402468 ms$0.005
35 h agoPassed402446 ms$0.005
39 h agoPassed402336 ms$0.005
44 h agoPassed40275 ms$0.005
2 days agoPassed402652 ms$0.005
2 days agoPassed402434 ms$0.005
3 days agoPassed402416 ms$0.005