🌿 Spring Specials
​40% OFF
with Code
PROOFYSPRING40
Credits Never Expired
icon lightning
4740+
People Trust Us
Green Arrow Right

Email Validation API

Integrate real-time email verification directly into your application using Proofy's email validation API. Supports single address checks, batch processing, and bulk file validation via a single REST endpoint. Simple documentation, secure HTTPS, structured JSON responses.

Trusted by 4,740+ Companies Worldwide

Advantages of using Email Address Verification API

The email verification API connects to your platform in under 30 minutes using standard REST calls and API key authentication. Whether you need to validate addresses on signup forms in real time or run scheduled hygiene jobs on an existing database, a single integration covers all scenarios. Code examples are available in Python, PHP, JavaScript, and cURL in the API docs.
Real-Time, Batch and Bulk API
Validate email addresses instantly for registration and subscription forms while also verifying batch and bulk files effortlessly to maintain comprehensive email hygiene.
Single-address calls return results in under one second, making them suitable for live form validation without added friction. Batch and bulk modes handle large files asynchronously, with results delivered via webhook or available for download when processing is complete.
Easy Integration with Secure API and Simple Docs
Seamlessly integrate the API into your platform with clear, step-by-step documentation. Enjoy secure processes that protect your data and ensure privacy. Authentication uses a single API key passed in the request header. The address verification API returns a structured JSON object with a clear status field: valid, invalid, risky, or unknown, so your application logic stays simple and predictable.
Fast Email Verification API
Experience rapid email validation to keep your workflows smooth, efficient, and uninterrupted. Server-to-server calls bypass browser limitations entirely, so throughput scales with your infrastructure. There are no session-based rate limits on bulk jobs, and concurrent requests are supported for high-volume pipelines.
High Accuracy Verification
Utilize advanced algorithms to achieve precise email validation, minimizing errors and ensuring maximum reliability. Each email verifier API call checks domain MX records, tests mailbox existence via SMTP handshake, and flags disposable or catch-all addresses, all without sending a single message. Results reflect the actual state of the mailbox at the moment of the call.

Who can benefit from email validation API?

The email verification API fits into any stack where email addresses need to be validated automatically, without manual uploads or separate tools.
API

Email marketers

Can get rid of invalid addresses and improve their campaign results
1
Reduce invalid or Disposables addresses from your email list and increase the deliverability rates
2
Prevent abuse and spam complaints due to misspelled addresses
3
Provide subscribers with the opportunity to restore their subscription using valid data
Connecting the email validation API to your sending platform means every new subscriber is checked at the point of capture, before they ever reach your list. This keeps your database clean without requiring a separate manual upload step.
Proofy API Docs

High-traffic websites

Benefit from an email verification API because it helps to:
1
Prevent bots and invalid emails
2
Send emails to real people, who are interested in your offer and reduce hard bounced emails
3
Reduce mailing costs by removing invalid addresses and enhancing the efficiency of your campaigns.
The API to verify email address integrates directly into registration and checkout flows with a single endpoint call. Legitimate users see no added steps, while invalid and bot-submitted addresses are blocked at source.
Verify Image
Image Result

Companies

Will improve their business with API verification as well:
1
Send emails to the verified addresses so you will not miss any of your clients
2
Protect the IP reputation by decreasing the number of newsletters sent to mistaken addresses
3
Save money by sorting of the bad emails as approximately 50% of your email lists become invalid in a year without proper verification
Scheduled API jobs can run against your CRM on a weekly or monthly cycle, automatically flagging addresses that have gone stale since your last campaign. No manual exports, no file uploads.

FAQ about Email Validation API

Here is what some of our customers say about our platform
What is the email verifier API?

An email verifier API is a programmatic interface that lets you validate email addresses in real time, batch, or bulk through simple REST calls. Proofy's email verifier API checks each address against syntax rules, DNS and MX records, and a live SMTP handshake - returning a structured JSON verdict in under one second. Each address is classified as valid, invalid, risky, disposable, catch-all, or role-based, with full documentation and code examples for Python, PHP, JavaScript, and cURL available at docs.proofy.io.

How does email verification api work?

An email verification API integrates directly into applications, enabling real-time or bulk validation of email addresses. It checks syntax, domains, and mailboxes, ensuring accurate categorization as valid, invalid, risky, or unknown for cleaner, up-to-date email lists.

Is email address validation API free?

Proofy does not offer free credits to prevent abuse. New users can purchase a trial package to test the API across all three modes before committing to a larger plan. Full API documentation is publicly available at docs.proofy.io without registration.

What are the benefits of using email verification API?

An email verification API offers bulk validation of up to
1 million addresses per file with high accuracy and speed. It validates MX records, assesses domain quality, detects disposable emails, and processes data in real-time, all without requiring software installation.

Practical usage: who can benefit from email validation API?

Any business, startup, or organization that handles email lists can benefit from an email validation API. It’s ideal for companies looking to integrate seamless email verification into their systems, ensuring clean and accurate databases for marketing, communication, or user engagement.

What is the difference between real-time and batch email verification API?

Real-time verification validates a single address per call and returns a result immediately, typically used on signup or checkout forms. Batch and bulk modes accept multiple addresses in one request or as a file and process them asynchronously, making them suitable for cleaning existing lists or running scheduled database hygiene jobs.

Start Verifying Email Addresses Today

Proofy's email verifier software removes invalid, disposable, and risky addresses before they reach your list.
First 1000 verification credits just $4
Get Started
White Arrow Right