ToolVet
13trust / 100

Legal Trademark Precheck

by LegalPulse in Security & trust

x402 APIFailing, checked 4 h ago

Trademark precheck (agent-tier preview of /api/legal/trademark-check $0.50): live USPTO TSDR verification of serial/registration numbers you already have — returns the official LIVE/DEAD status, owner, classes, and dates verbatim. Does not run candidate-discovery research or produce a conflict-risk verdict; those require the full product. For legal, brand-naming, and IP agents with small per-call budgets.

GET
https://legalpulse.theaslangroupllc.com/api/legal/trademark-precheck
Price
$0.25
per call in USDC
Uptime
0.0%
last 30 days
Response time
-
no timed checks yet
Last check
Failed
4 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Latest check failed 4 h ago: Amount "0.25" is not in atomic token units

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

How to call it

GET https://legalpulse.theaslangroupllc.com/api/legal/trademark-precheck

Each call costs $0.25 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://legalpulse.theaslangroupllc.com/api/legal/trademark-precheck

Parameters

ParameterTypeRequiredDescription
markstringNothe brand/product name to check (used for input validation and context only — this route does not search for conflicts)
serialstringNoCSV of known USPTO serial/registration numbers to verify live — REQUIRED to get official records back

Example response

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

{
  "live_registrations_found": 1,
  "mark": "Nimbus Labs",
  "official_verified_records": [
    {
      "classes": [
        "009"
      ],
      "mark": "NIMBUS",
      "owners": [
        "Nimbus Inc."
      ],
      "serial_number": 97123456,
      "tm5_status": "LIVE/REGISTRATION/Issued and Active"
    }
  ],
  "upsell": {
    "adds": "Live web research to discover candidate conflicts you don't already have serial numbers for, plus an AI-generated conflict-risk verdict.",
    "full_product": "/api/legal/trademark-check",
    "price_usd": 0.5
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.25.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://legalpulse.theaslangroupllc.com/api/legal/trademark-precheck'

# 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://legalpulse.theaslangroupllc.com/api/legal/trademark-precheck' \
  | 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 $0.25 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.25" });
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 $0.25 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Flegalpulse.theaslangroupllc.com%2Fapi%2Flegal%2Ftrademark-precheck
const res = await pay("https://legalpulse.theaslangroupllc.com/api/legal/trademark-precheck");
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 $0.25 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.25"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://legalpulse.theaslangroupllc.com/api/legal/trademark-precheck")
    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 agoAmount "0.25" is not in atomic token units402159 ms$0.25
9 h agoAmount "0.25" is not in atomic token units402195 ms$0.25
15 h agoAmount "0.25" is not in atomic token units402196 ms$0.25
19 h agoAmount "0.25" is not in atomic token units402197 ms$0.25
23 h agoAmount "0.25" is not in atomic token units402410 ms$0.25