ToolVet
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Dns Propagation

by Forest Infra in Developer tools

x402 APIPassing, checked 2 h ago

Check whether a DNS change has reached the configured public resolvers. Compare public DoH answers with an optional expected answer set and return complete, partial, not_observed or unknown. Scope is a fixed bounded resolver set; Forest does not claim worldwide propagation. Base mainnet USDC

POST https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/dns/propagation

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Status and outage history · Atom feed

Uptime
100%
Response time
48 ms typical, 197 ms slowest 5%
Last check
2 h ago
Next check
any minute now

How to call it

POST https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/dns/propagation

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://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/dns/propagation
content-type: application/json

{
  "expected_answers": [
    "93.184.216.34"
  ],
  "hostname": "example.com",
  "record_type": "A"
}

Parameters

ParameterTypeRequiredDescription
expected_answersarray of stringNoPublic expected answers value used to scope this lookup.
hostnamestringYesPublic hostname value used to scope this lookup.
record_typeanyYesPublic record type value used to scope this lookup. One of: A, AAAA, CNAME, MX, NS, TXT.

Example response

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

{
  "capability": "dns.propagation",
  "data": {
    "answer_sets": [],
    "consensus_state": "agreement",
    "expected_answers": [],
    "failed_resolvers": 0,
    "hostname": "example",
    "matching_resolvers": 0,
    "record_type": "example",
    "resolver_count": 1,
    "resolvers": [],
    "scope": "bounded_public_doh_resolvers_only",
    "state": "complete",
    "successful_resolvers": 0
  },
  "meta": {
    "cache": "miss",
    "checked_at": "2026-01-01T00:00:00.000Z",
    "duration_ms": 0,
    "provider": "cloudflare-doh"
  },
  "ok": true,
  "version": "1"
}

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://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/dns/propagation' \
  -H 'content-type: application/json' \
  --data-raw '{"expected_answers":["93.184.216.34"],"hostname":"example.com","record_type":"A"}'

# 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://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/dns/propagation' \
  -H 'content-type: application/json' \
  --data-raw '{"expected_answers":["93.184.216.34"],"hostname":"example.com","record_type":"A"}' \
  | 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%2Fhttp--forest-gas-station-mainnet--lcjl27p8lmjs.code.run%2Fdns%2Fpropagation&method=POST
const res = await pay("https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/dns/propagation", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "expected_answers": [
      "93.184.216.34"
    ],
    "hostname": "example.com",
    "record_type": "A"
  }),
});
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://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/dns/propagation",
        json={
            "expected_answers": [
                "93.184.216.34",
            ],
            "hostname": "example.com",
            "record_type": "A",
        },
    )
    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
2 h agoPassed402188 ms$0.003
6 h agoPassed402123 ms$0.003
10 h agoPassed40243 ms$0.003
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2 days agoPassed402122 ms$0.003