Feature

Stop Bad Emails at the Source with our Real-time API

Integrate our powerful verification API directly into your signup forms, pop-ups, and applications to block invalid emails before they ever hit your list.

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Powerful tools for instant data quality

Our developer-friendly API provides instant feedback, ensuring a clean list and a frictionless user experience.

Simple & Fast Integration

Get up and running in minutes. Our REST API is designed for ease of use, with clear documentation and predictable responses.

  • Simple HTTP GET/POST requests
  • Clear JSON responses (valid, invalid, risky)
  • Code examples for popular languages
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Comprehensive Verification Checks

Go beyond a simple syntax check. Our API performs a multi-layered verification process to give you an accurate result.

  • Syntax and format validation
  • MX record and mail server checks
  • Spam trap and disposable address detection
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Improve User Experience & Conversions

Prevent typos and user errors at the point of entry, reducing signup friction and ensuring you can communicate with your new leads.

  • Suggest corrections for common typos (e.g., 'gnail.com')
  • Provide instant feedback to users on forms
  • Reduce failed signups and support tickets
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How Our Verification API Works

Validate emails in real-time with a simple, three-step API workflow.

1

Get Your API Key

Sign up for a free SendVerify account and grab your unique API key from the dashboard.

2

Make an API Call

From your application's backend or frontend, send a request to our API endpoint with the email address you want to verify.

3

Receive & Act on the Result

Instantly receive a JSON response with the validation status (valid, invalid, risky) and use it to provide feedback to the user or accept/reject the submission.

Frequently asked questions

Everything you need to know about SendX and email marketing

How fast are the API responses?

Our API is optimized for speed, typically returning a validation result in well under a second. This ensures a smooth and seamless experience for your users without noticeable delays.

Can I use the API on my client-side JavaScript?

Yes, you can call the API from client-side JavaScript. We recommend using it alongside server-side validation for maximum security, but it is designed to be flexible for various implementation needs.

What are the API rate limits?

Our API has generous rate limits designed to handle high-traffic forms and applications. Specific limits depend on your plan, but our free tier is sufficient for most standard use cases. Please check our pricing page or developer documentation for details.

Can I integrate SendVerify with my forms or application?

Yes, and we highly recommend it. SendVerify provides a real-time Email Verification API that you can integrate directly into your signup forms, pop-ups, and application workflows. This allows you to validate email addresses at the point of capture, preventing bad data from ever entering your system.

How accurate is SendVerify?

SendVerify provides one of the highest accuracy rates in the industry, up to 99%. Our comprehensive, multi-layered verification process ensures that we provide the most reliable results possible, so you can be confident that you are removing harmful emails and protecting your sender reputation effectively.

Still have questions? We're here to help.

Ready for a Cleaner, More Effective Email List?

Join thousands of businesses who use SendVerify to reduce bounces, avoid spam traps, and improve their email marketing ROI.