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mailcheck.hugen.tokyo mailcheck mx
https://mailcheck.hugen.tokyo/mailcheck/mx
answers 402
MX record lookup for any domain — returns whether mail servers exist and their hostnames sorted by priority. Verify email deliverability before sending. Supports all TLDs including ccTLDs and new gTLDs. No DNS library setup needed. Accepts USDC payments on Base and Solana
We sent a real
GET request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.01
- Network
- base
- Pay to
- 0x29322Ea7EcB34aA6164cb2ddeB9CE650902E4f60
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- GET
- Response latency
- 455 ms
- Payment options
- 2 usable of 2
- Last checked
- 2026-09-06T01:23:34.669Z (32d ago)
- Category
- finance-crypto
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fmailcheck.hugen.tokyo%2Fmailcheck%2Fmx"