ToolVet
75trust / 100

Tools Argument Validation

by Tool Argument Contract Check in Onchain & crypto

x402 APIPassing, checked 9 h ago

Check up to 32 JSON argument values against a closed, declared scalar tool contract: types, required fields, code-point length and exact safe-integer bounds. Rounded fractions/underflow are not integers. Returns unknown fields and mismatches. No remote references, arbitrary patterns, tool execution or MCP conformance certification. New modular adapter: retained result recovery for 24 hours, minimal receipt metadata for 90 days. Existing live route unchanged.

POST https://www.mahastrategies.com/api/v1/verify/tools/argument-validation

Last 30 days

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Status and outage history · Atom feed

Uptime
100%
Response time
196 ms typical, 196 ms slowest 5%
Last check
9 h ago
Next check
any minute now

How to call it

POST https://www.mahastrategies.com/api/v1/verify/tools/argument-validation

Each call costs $0.01002 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://www.mahastrategies.com/api/v1/verify/tools/argument-validation
content-type: application/json

{
  "arguments": [
    {
      "name": "count",
      "valueJson": "3"
    }
  ],
  "dataClass": "synthetic",
  "fields": [
    {
      "maxLength": 80,
      "maximum": 10,
      "minimum": 1,
      "name": "count",
      "required": true,
      "type": "integer"
    }
  ]
}

Parameters

ParameterTypeRequiredDescription
argumentsarrayYes
dataClassstringYes One of: public, synthetic.
fieldsarrayYes

Example response

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

Example response, 27 lines
{
  "data": {
    "chargedAmount": "10020",
    "inputHash": "sha256:b5960ff60a62defd95105c155b9396fcf240f6ce34ce297a4b336c562…",
    "limitations": [
      "Public or synthetic inputs only. Caller labels are declarations,…"
    ],
    "productId": "tool-argument-validation",
    "result": {
      "checks": [
        {
          "codes": [],
          "id": "count"
        }
      ],
      "consistent": true,
      "executionAuthorized": false
    },
    "resultHash": "sha256:5115a203a9a26db47f6f73e6ecafd559a8e6c9adcd2b826e213ac054b…",
    "sourceContractAmount": "4500",
    "version": "maha-legacy-adapter/1"
  },
  "proof": {
    "settlement_id": "0x00000000000000000000000000000000000000000000000000000000000000…"
  },
  "success": 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 $0.01002.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://www.mahastrategies.com/api/v1/verify/tools/argument-validation' \
  -H 'content-type: application/json' \
  --data-raw '{"arguments":[{"name":"count","valueJson":"3"}],"dataClass":"synthetic","fields":[{"maxLength":80,"maximum":10,"minimum":1,"name":"count","required":true,"type":"integer"}]}'

# 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://www.mahastrategies.com/api/v1/verify/tools/argument-validation' \
  -H 'content-type: application/json' \
  --data-raw '{"arguments":[{"name":"count","valueJson":"3"}],"dataClass":"synthetic","fields":[{"maxLength":80,"maximum":10,"minimum":1,"name":"count","required":true,"type":"integer"}]}' \
  | 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 $0.01002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01002" });
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 $0.01002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fverify%2Ftools%2Fargument-validation&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/verify/tools/argument-validation", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "arguments": [
      {
        "name": "count",
        "valueJson": "3"
      }
    ],
    "dataClass": "synthetic",
    "fields": [
      {
        "maxLength": 80,
        "maximum": 10,
        "minimum": 1,
        "name": "count",
        "required": true,
        "type": "integer"
      }
    ]
  }),
});
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 $0.01002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://www.mahastrategies.com/api/v1/verify/tools/argument-validation",
        json={
            "arguments": [
                {
                    "name": "count",
                    "valueJson": "3",
                },
            ],
            "dataClass": "synthetic",
            "fields": [
                {
                    "maxLength": 80,
                    "maximum": 10,
                    "minimum": 1,
                    "name": "count",
                    "required": True,
                    "type": "integer",
                },
            ],
        },
    )
    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
9 h agoPassed402196 ms$0.01