Email Validation API
Verify Any Email in Real Time

"email":"mike.smith@yopmail.com",
"is_disposable_email": true,
"quality_score": 0.33,
"deliverability": "DELIVERABLE",
"is_mx_found": true,
"is_smtp_valid": true,
"is_valid_format": true,

The Abstract email validation API takes an email address and identifies whether it is valid or not, and how risky we think it will be. This real-time or asynchronous capability will help you detect and suppress any invalid or disposable email addresses, which will help clean your email list, reduce your bounce rate, and thus improve your email delivery rate for legitimate users. Email validation is especially powerful when combined with tools like the IP geolocation API and / or the phone number validation API to provide simple checks for new users.

Abstract's email validation API uses a variety of increasingly sophisticated and frequently updated techniques to ensure you suppress all invalid or risky emails. These techniques include (but are not limited to): checking for syntax errors and typos in the email address (e.g., john@gnamil.com), doing real time SMTP and MX record checks against the email's domain, performing a sophisticated regular expression (regex) check on the email, and using a variety of other filters backed by machine learning to detect invalid or risky emails.

We can also identify and flag other characteristics of an email, such as whether it's from a free email provider (such as Yahoo or Gmail), whether it's from a disposable email services (such as Yopmail), and whether it's from a 'role' email address (such as team@ or @sales@).

We can also help you identify emails that are from recently registered domains, even if those domains otherwise past other filters. Recently registered domains and emails can signal that the user is fraudulent, spammy, or in some other way needs to be reviewed.

Invalid and risky addresses cost you three ways: they bounce, they hurt your sender reputation so even good emails land in spam, and they inflate list costs and skew your engagement metrics. Validating at signup and before each send keeps your list clean and your deliverability high.

Accuracy depends mostly on the receiving mail server. For most domains, the live SMTP check confirms whether a mailbox exists. Catch-all domains accept every address, so no provider can confirm a specific inbox there; Abstract flags them as catch-all rather than guessing, which keeps your bounce rate predictable.

Yes. The free plan includes 100 validations with no credit card required, so you can test in development before you upgrade. Paid plans start at $17 a month and scale with your volume, and every plan returns the full validation result.

Yes. Use the real-time REST API to validate a single address inline at signup or checkout, or run a list through bulk validation to clean an existing database. Both use the same checks and return the same deliverability result.

They're used interchangeably. Validation checks that an address is well-formed and its domain can receive mail; verification connects to the mail server over SMTP to confirm the specific mailbox exists. Abstract's API does both in one request.