Check whether an email address is real and safe to send to: syntax, typos (gmial.com → gmail.com), mail server (MX) records, disposable inboxes, role accounts and free providers. No signup.
25 free checks per day. Need more? Sign up for 250 free lookups, then use the API or upload a CSV.
Catches malformed addresses and normalises case and Unicode.
Spots near-misses of common domains and suggests the fix.
Looks up public DNS to see if the domain can receive mail.
Flags ~9,900 known throwaway email domains.
Marks info@, sales@ and free providers like Gmail so you can decide.
Every result says accept, confirm with user, or reject, with plain reasons.
GuardAccess does not connect to the recipient's mail server (no SMTP mailbox probing), so it cannot confirm a specific mailbox exists. If you need mailbox-level verification for cold outreach, see our honest ZeroBounce and NeverBounce comparisons.
Clean a CSV of up to 50,000 rows from the dashboard, or call POST /v1/email from your app or AI agent (MCP tool validate_email). 1 credit per email, from $1.67 per 1,000.