Is this address clear?
ClearAddress checks syntax, domain, mail servers and disposable providers, and tells you exactly what that means. No inflated promises, no stored data.
- SyntaxhasValidSyntax...
- DomainhasValidDomain...
- Mail servershasValidMX...
- Role mailboxisFunctional...
- DisposableisDisposable...
$ curl -fsSL "https://ca.rda.run/v1/user@example.org"
Five checks. One verdict.
An address is clear only when it passes all five. Each one maps to a field in the API response.
hasValidSyntaxSyntax
Formatted like name@domain.com. Catches typos and structural errors.
hasValidDomainDomain
The domain exists and is registered.
hasValidMXMail servers
MX records are set and the servers they name resolve.
isFunctionalNot a role
Not a team mailbox like info@, support@ or sales@.
isDisposableNot disposable
Not from a known temporary email provider.
We call it clear, not valid.
No one can promise a mailbox will accept your message without actually sending one. So we tell you precisely what we verified, and what we did not.
What we validate
- The address is structured correctly.
- It points to a domain set up to receive mail.
- It is not a throwaway or role mailbox.
What we don't claim
- That this specific mailbox is active right now.
- That it will accept your message.
- Anything only a delivery attempt can tell.
Free. Really.
ClearAddress is under construction and free to use. Paid plans may come later, always with a generous free tier and at least 30 days of notice. Pricing details
Handmade in Porto Alegre.
ClearAddress is built by Rodrigo de Avila, a seasoned Site Reliability Engineer with extensive experience building and maintaining highly available distributed systems, based in Porto Alegre, Brazil. It exists because an accessible, effective email verification service should not come with the usual barriers of cost or complexity.