mailcheck — Email Validation & Deliverability

https://mailcheck.x402tools.xyz

● healthy utility

Validate any email for deliverability, disposability, and risk. DNS + SMTP verification, disposable domain detection, typo suggestions. Pay-per-call via x402 (USDC on Base).

How to call

cURL · x402-fetch / x402-axios will auto-handle 402

curl -X POST https://mailcheck.x402tools.xyz

/.well-known/x402.json

https://mailcheck.x402tools.xyz/.well-known/x402