x402-agent-tools.nerolabs.workers.dev

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "docs": "https://x402-agent-tools.nerolabs.workers.dev/openapi.json",
  "error": "payment_required",
  "input": {
    "type": "object",
    "required": [
      "email"
    ],
    "properties": {
      "email": {
        "type": "string",
        "description": "The email address to check, for example ana@example.com."
      }
    },
    "additionalProperties": false
  },
  "message": "This call costs $0.001 in USDC on Base, paid per call over x402 (no account or API key). Read the PAYMENT-REQUIRED header, sign the payment, and retry with a PAYMENT-SIGNATURE header. You are only charged if the call succeeds.",
  "endpoint": "GET /email-check",
  "price_usd": "0.001",
  "description": "Checks one email address and returns valid, risky or invalid with the reasons: address format, whether the domain can receive mail (live MX lookup), known throwaway domains (mailinator and others, invalid), shared inboxes like info@ or sales@ (risky), likely typos such as gmial.com with the fix in didYouMean, and free providers such as gmail.com (flag only). Does not ping the mailbox (no SMTP), so valid is not a delivery guarantee."
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xA969a3127DcC74B2989a4b4e45Ae61B81093164A",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://x402-agent-tools.nerolabs.workers.dev/email-check",
    "description": "",
    "maxAmountRequired": "1000",
    "maxTimeoutSeconds": 120
  }
]

Provenance

Seen in the source catalog

2026-10-21 21:47Z

Last indexed by Roundhouse

2026-10-23 20:16Z

Last enriched (probe, favicon, geo)

2026-10-23 19:46Z

x402 version

1

Max timeout

120s

Liveness probe

HTTP 402