78trust / 100

Verify

by x402-tollbooth.onrender.com in Security & trust

x402 APIPassing, checked 3 h ago

Check whether email addresses are real and safe to send to. Verifies up to 25 addresses per call: syntax, domain MX/A record (including null-MX), disposable-domain, role-account, free-provider and typo checks. Does not perform SMTP/mailbox verification.

POST https://x402-tollbooth.onrender.com/api/verify

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
606 ms typical, 714 ms slowest 5%
Last check
3 h ago
Next check
any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X POST "https://x402-tollbooth.onrender.com/api/verify" \
  -H "content-type: application/json" \
  -d '{"emails":["[email protected]","[email protected]"]}'
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fx402-tollbooth.onrender.com%2Fapi%2Fverify
const res = await pay("https://x402-tollbooth.onrender.com/api/verify", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"emails":["[email protected]","[email protected]"]}),
});
console.log(await res.json());

Example input

{
  "emails": [
    "[email protected]",
    "[email protected]"
  ]
}

Example output

{
  "checked": 2,
  "checks_performed": [
    "syntax",
    "domain_mx_or_a_record",
    "null_mx",
    "disposable_domain_list",
    "role_based_account",
    "free_provider_flag",
    "typo_suggestion"
  ],
  "note": "These are format and domain-level checks, not a live SMTP/mailbox delivery guarantee. status 'unknown' means DNS was inconclusive - retry later.",
  "results": [
    {
      "checks": {
        "disposable_domain": false,
        "domain_accepts_mail": true,
        "free_provider": true,
        "role_based_account": false,
        "syntax_valid": true
      },
      "did_you_mean": null,
      "email": "[email protected]",
      "notes": [
        "Passed syntax, domain, disposable, role-account, and typo checks."
      ],
      "status": "valid"
    },
    {
      "checks": {
        "disposable_domain": true,
        "domain_accepts_mail": true,
        "free_provider": false,
        "role_based_account": false,
        "syntax_valid": true
      },
      "did_you_mean": null,
      "email": "[email protected]",
      "notes": [
        "Domain is on a known disposable/throwaway email list."
      ],
      "status": "risky"
    }
  ]
}

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

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