ToolVet
78trust / 100

Dns Lookup

by agentshelf.syntexa.ch in Developer tools

x402 APIPassing, checked 39 min ago

Call when an agent needs public DNS A, AAAA, MX, TXT, and CNAME records for a hostname. Use it to see where a domain points. Optional types limits the query. Private targets are blocked. Send JSON {"hostname":"example.com","types":["A","AAAA","MX","TXT","CNAME"]}. Exact $0.003 USDC on Base. Try unpaid POST /v1/sandbox/dns-lookup first.

POST
https://agentshelf.syntexa.ch/v1/dns-lookup
Price
$0.003
per call in USDC
Uptime
100%
last 30 days
Response time
38 ms
295 ms slowest 5%
Last check
Passed
39 min ago, next any minute now

Run a free test callHow to call it

Reliability

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

How to call it

POST https://agentshelf.syntexa.ch/v1/dns-lookup

Each call costs $0.003 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://agentshelf.syntexa.ch/v1/dns-lookup
content-type: application/json

{
  "hostname": "example.com",
  "types": [
    "A",
    "AAAA",
    "MX",
    "TXT",
    "CNAME"
  ]
}

Parameters

ParameterTypeRequiredDescription
hostnamestringYesPublic hostname such as example.com. Private and metadata names are blocked. Not a URL.
typesarray of stringNoRecord types to query. Any of A, AAAA, MX, TXT, CNAME. Omit it to query all five.

Example response

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

{
  "billed": true,
  "hostname": "example.com",
  "ok": true,
  "receipt_id": "rcpt_01EXAMPLE000000000000000",
  "records": {
    "A": [
      "93.184.216.34"
    ],
    "AAAA": [],
    "CNAME": [],
    "MX": [
      {
        "exchange": "mail.example.com",
        "priority": 10
      }
    ],
    "TXT": [
      "v=spf1 -all"
    ]
  },
  "warnings": []
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.003.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://agentshelf.syntexa.ch/v1/dns-lookup' \
  -H 'content-type: application/json' \
  --data-raw '{"hostname":"example.com","types":["A","AAAA","MX","TXT","CNAME"]}'

# 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://agentshelf.syntexa.ch/v1/dns-lookup' \
  -H 'content-type: application/json' \
  --data-raw '{"hostname":"example.com","types":["A","AAAA","MX","TXT","CNAME"]}' \
  | 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 $0.003 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.003" });
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 $0.003 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagentshelf.syntexa.ch%2Fv1%2Fdns-lookup&method=POST
const res = await pay("https://agentshelf.syntexa.ch/v1/dns-lookup", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "hostname": "example.com",
    "types": [
      "A",
      "AAAA",
      "MX",
      "TXT",
      "CNAME"
    ]
  }),
});
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 $0.003 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.003"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://agentshelf.syntexa.ch/v1/dns-lookup",
        json={
            "hostname": "example.com",
            "types": [
                "A",
                "AAAA",
                "MX",
                "TXT",
                "CNAME",
            ],
        },
    )
    print(res.status_code, res.text)

Security scan

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