ToolVet
77trust / 100

Email Verify

by HubVibe in Email & messaging

x402 APIPassing, checked 48 min ago

Email verification / email validation: will mail to this address arrive? Checked live at the source: syntax, the domain's DNS (MX, null MX, no such domain) and its own mail server, asked whether the mailbox exists and whether it accepts any address (catch-all). No message sent. Flags disposable domains, role accounts (info@), free providers and typos (gmial.com). Verdict: deliverable, undeliverable, risky or unknown, with the reason. Input: email.

POST https://hubvibe-io.com/work/email/verify

Last 30 days

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Status and outage history · Atom feed

Uptime
100%
Response time
371 ms typical, 465 ms slowest 5%
Last check
48 min ago
Next check
any minute now

How to call it

POST https://hubvibe-io.com/work/email/verify

Each call costs $0.02 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://hubvibe-io.com/work/email/verify
content-type: application/json

{
  "email": "[email protected]"
}

Parameters

ParameterTypeRequiredDescription
emailstringYes
languagestringNo

Example response

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

Example response, 51 lines
{
  "price_usd": 0.02,
  "provenance": {
    "attempts": 1,
    "elapsed_ms": 660,
    "providers_used": [
      "mailcheck"
    ],
    "steps": [
      {
        "ms": 640,
        "ok": true,
        "provider": "mailcheck",
        "step": "verify"
      }
    ]
  },
  "receipt_id": "rcpt_9f1c2b3a4d5e6f70",
  "receipt_url": "/work/receipts/rcpt_9f1c2b3a4d5e6f70",
  "result": {
    "accepts_mail": true,
    "checked_at": "2026-09-26T18:00:00Z",
    "did_you_mean": null,
    "disposable": false,
    "disposable_list_as_of": "2026-09-28",
    "domain": "github.com",
    "domain_ascii": "github.com",
    "domain_exists": true,
    "email": "[email protected]",
    "free_provider": false,
    "local_part": "support",
    "mail_provider": "google",
    "mailbox": {
      "catch_all": false,
      "checked": true,
      "exists": true,
      "mx_host": "aspmx.l.google.com",
      "smtp_code": 250,
      "smtp_message": "2.1.5 OK"
    },
    "mx": [],
    "normalized": "[email protected]",
    "notes": [],
    "reason": "mailbox_exists",
    "role_account": true,
    "syntax_valid": true,
    "verdict": "deliverable"
  },
  "status": "ok",
  "worker": "email.verify"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.02.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://hubvibe-io.com/work/email/verify' \
  -H 'content-type: application/json' \
  --data-raw '{"email":"[email protected]"}'

# 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://hubvibe-io.com/work/email/verify' \
  -H 'content-type: application/json' \
  --data-raw '{"email":"[email protected]"}' \
  | 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 $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
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 $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fhubvibe-io.com%2Fwork%2Femail%2Fverify&method=POST
const res = await pay("https://hubvibe-io.com/work/email/verify", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "email": "[email protected]"
  }),
});
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 $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://hubvibe-io.com/work/email/verify",
        json={
            "email": "[email protected]",
        },
    )
    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

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