ToolVet
73trust / 100

Listings Check Listing Visibility

by Mekler AI in Developer tools

x402 APIPassing, checked 5 h ago

Monitor one paid API operation across x402scan, CDP Bazaar and Agentic Market. Check exact listing presence, one to three buyer queries and optional description drift. Return dated evidence, confirmed change alerts, private history and the next polling request. Partial coverage and timeouts stay unknown; no ranking or indexing guarantee.

POST
https://api.mekler.ai/v1/services/listings/check-listing-visibility
Price
$0.005
per call in USDC
Uptime
100%
last 30 days
Response time
1.1 s
1.3 s slowest 5%
Last check
Passed
5 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

POST https://api.mekler.ai/v1/services/listings/check-listing-visibility

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://api.mekler.ai/v1/services/listings/check-listing-visibility
content-type: application/json

{
  "market_slug": "api-mekler-ai",
  "merchant": "0xF6c6E2e530bb311c14a49C1a07C720fc232c07c5",
  "poll_id": "listing_monitor_example_01",
  "queries": [
    "check email address syntax and domain MX records"
  ],
  "resource": "https://api.mekler.ai/v1/email/domains/check-mail-configuration"
}

Parameters

ParameterTypeRequiredDescription
cursorstringNo
expectedobjectNo
market_slugstringNo
merchantstringNo
methodstringNo One of: GET, POST. Default: "POST".
poll_idstringYes
queriesarray of stringYes
resourcestring (uri)Yes

Example response

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

{
  "checked_at": 1792155600,
  "cost": {
    "directory_attempts": 6,
    "infrastructure_actual_usd": null,
    "request_limit": 24,
    "supplier_charge_usd": "0"
  },
  "resource": "https://api.mekler.ai/v1/email/domains/check-mail-configuration",
  "status": "ok"
}

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://api.mekler.ai/v1/services/listings/check-listing-visibility' \
  -H 'content-type: application/json' \
  --data-raw '{"market_slug":"api-mekler-ai","merchant":"0xF6c6E2e530bb311c14a49C1a07C720fc232c07c5","poll_id":"listing_monitor_example_01","queries":["check email address syntax and domain MX records"],"resource":"https://api.mekler.ai/v1/email/domains/check-mail-configuration"}'

# 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.mekler.ai/v1/services/listings/check-listing-visibility' \
  -H 'content-type: application/json' \
  --data-raw '{"market_slug":"api-mekler-ai","merchant":"0xF6c6E2e530bb311c14a49C1a07C720fc232c07c5","poll_id":"listing_monitor_example_01","queries":["check email address syntax and domain MX records"],"resource":"https://api.mekler.ai/v1/email/domains/check-mail-configuration"}' \
  | 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%2Fapi.mekler.ai%2Fv1%2Fservices%2Flistings%2Fcheck-listing-visibility&method=POST
const res = await pay("https://api.mekler.ai/v1/services/listings/check-listing-visibility", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "market_slug": "api-mekler-ai",
    "merchant": "0xF6c6E2e530bb311c14a49C1a07C720fc232c07c5",
    "poll_id": "listing_monitor_example_01",
    "queries": [
      "check email address syntax and domain MX records"
    ],
    "resource": "https://api.mekler.ai/v1/email/domains/check-mail-configuration"
  }),
});
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://api.mekler.ai/v1/services/listings/check-listing-visibility",
        json={
            "market_slug": "api-mekler-ai",
            "merchant": "0xF6c6E2e530bb311c14a49C1a07C720fc232c07c5",
            "poll_id": "listing_monitor_example_01",
            "queries": [
                "check email address syntax and domain MX records",
            ],
            "resource": "https://api.mekler.ai/v1/email/domains/check-mail-configuration",
        },
    )
    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
5 h agoPassed4021.3 s$0.005
10 h agoPassed4021.1 s$0.005