Maker here MailGuard is in pre-launch: the free tier is live now (500 checks a month, no card) and paid plans go on in a few months. I'd love input from this community before then.
Quick recap of what it does in one call: syntax + MX checks, disposable and role-account detection, a "did you mean gmail.com?" typo suggestion, and a 0-100 deliverability score. It runs on Cloudflare Workers with no database, which is what keeps it fast and cheap.
You can try it with no signup via the free email checker.
MailGuard is an email verification API for developers. One call checks syntax, MX records, disposable and role addresses, suggests typo fixes, and returns a 0-100 deliverability score. Free tier (500/mo, no card), and up to 100x cheaper than the incumbents.
