Valıdate User Sıgn-Ups ın Real Tıme vıa API and Protect Your Busıness Instantly

Checker’s API detects disposable emails, suspicious domains, and device fingerprints (coming soon) in <200ms. Block fake sign-ups before they drain your resources, skew your analytics, or exploit freemium models. GDPR-compliant security that scales with your traffic.

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Built to align with the best practices of teams worldwide

What do people who use Checker say?

Proudly rated 5/5 from 1000+ customers

  • Pro Scrape technology is far beyond other solutions on the market. It detects new temporary email providers every day.

    Andrew Y. Product Manager

  • Thanks to Checker, we've eliminated fake registrations. Our system now runs much faster and more efficiently.

    Michael A. E-commerce Manager

  • The DomainCatch feature helped us detect a botnet attack we hadn't noticed. We closed a major security gap.

    David B. Security Specialist

  • It truly delivers on the 200ms response time promise. We enhanced our security without any slowdown in user experience.

    Emily Y. UX Designer

  • The annual $97 fee was one of the most valuable investments we made. It paid for itself in the first week.

    Jennifer O. Startup Founder

  • Our customer database now consists of real users. Our analytics work yields much more meaningful results.

    Brian A. Data Analyst

  • Integration with our WordPress site was incredibly easy. I completed setup in 10 minutes and started seeing results immediately.

    James K. Web Developer

  • Thanks to the AWS infrastructure, we haven't experienced any issues even on high-traffic days. Checker's scalability is perfect.

    Rachel T. IT Manager

  • We saw a 99.8% success rate in detecting temporary email addresses. This was a game-changer for us.

    Kevin K. CTO

FAQ

1- What is Checker and what does it do?

Checker is an API-focused, real-time user registration validation service that protects your registration forms from fake users. It detects temporary email addresses, suspicious domains, and soon device fingerprints, blocking fraudulent and malicious registrations with an extremely low response time of 200 ms.

2- Who should use Checker?

Anyone with registration forms who wants to protect them from fake users can benefit from Checker. It is ideal for e-commerce sites, SaaS platforms, content management systems, forum sites, and all web applications requiring membership.

3- What are the advantages of Checker?

Checker enables more efficient use of your server resources, prevents abuse in freemium models, improves the accuracy of your marketing and analytical data, ensures your advertising spending targets the right audiences, and reduces your IT costs.

4- How does Checker work?

Checker uses three powerful components called Pro Scrape Technology: OmniCrawler scans temporary email providers and updates our database containing more than 170,000 suspicious domains. DomainCatch analyzes different registration attempts on the same domain. RiskyIPs (Coming Soon) analyzes users' device characteristics to detect multiple registrations from the same device.

5- How can I integrate Checker with my website?

Checker offers two different integration options: With API Integration, your development team can integrate the Checker API into your existing registration system using our documentation. If you have a WordPress-based site, you can integrate Checker without any coding knowledge by installing our user-friendly plugin.

6- Is the response time really as fast as 200 ms?

Yes, thanks to our AWS-supported infrastructure, our average response time is around 200 ms. This allows you to perform instant validation without negatively affecting your user experience.

7- How much do I need to pay for Checker?

Checker has a single pricing plan that offers unlimited usage: $97 annually.

8- What is included in this price?

The annual $97 package includes: Pro Scrape Technology, unlimited temporary email validation, unlimited requests per second, 20 Create APIs, WordPress plugin, custom Blacklist/Whitelist support, 24/7 customer support, and AWS-supported infrastructure.

9- Is there a trial period?

Yes, you can try Checker for free for 3 days.

10- What is your refund policy?

Refunds are provided if requested within 14 days of purchase. Refund requests made after 14 days are not accepted.

11- Is Checker GDPR compliant?

Yes, Checker operates in full compliance with GDPR standards and processes user data according to these standards.

12- Do you have a monthly payment option?

Currently, we only offer an annual payment plan. This allows us to provide our customers with the most economical price.

13- How often is Checker's database updated?

Our OmniCrawler technology scans temporary email providers daily and continuously updates our database, ensuring we are always prepared against new threats.

14- Do you have plugins for other CMS platforms besides WordPress?

Currently, we only have our WordPress plugin, but we plan to develop plugins for popular CMS platforms such as Shopify, Wix, and Joomla in the near future.

15- Can I use Checker for multiple websites?

Yes, you can use Checker on multiple websites with a single account. Our annual package price includes usage rights for 20 sites.

16- Can Checker accidentally block real users?

Checker is designed to minimize false positives. With our custom whitelist support, you can completely eliminate this risk by adding domains you know to be trustworthy to the system.

17- What should I do if I encounter a technical problem?

Our 24/7 support team is always ready to solve your technical problems. You can create a support ticket through your control panel or send an email to support@usechecker.com Our average response time is 4 hours.