Building software products, developer tools, and open-source technology.
Clustox is a software engineering company focused on building scalable web, mobile, cloud, AI, and SaaS products.
Our GitHub organization hosts open-source projects, developer tools, engineering resources, and the official SDK ecosystem for EmailVerify.io.
EmailVerify.io provides email verification, email validation, email finding, and deliverability tools for developers, SaaS platforms, sales teams, and marketing applications.
The EmailVerify.io Email Verification API allows developers to validate email addresses programmatically using multiple verification signals, including:
- Syntax validation
- DNS & MX verification
- SMTP mailbox verification
- Disposable email detection
- Catch-all detection
- Role-based email detection
- Spam-trap and risk signals
- Structured
statusandsub_statusresponses
Clustox maintains official EmailVerify.io client libraries across major programming languages so developers can integrate email verification directly into their applications.
Official Python SDK for EmailVerify.io
Integrate real-time email verification and email validation into Python applications.
Repository: Clustox/emailverify-python
Useful for:
- Django
- Flask
- FastAPI
- Data-processing pipelines
- SaaS applications
- Backend services
Official JavaScript and Node.js SDK for EmailVerify.io
Add email verification to Node.js applications, APIs, serverless functions, and JavaScript-based platforms.
Repository: Clustox/emailverify-javascript
Useful for:
- Node.js
- Express
- Next.js
- Serverless applications
- SaaS platforms
- Signup validation
Ruby client for the EmailVerify.io API
Integrate EmailVerify.io email verification and validation capabilities into Ruby applications.
Repository: Clustox/emailverify-ruby
Useful for:
- Ruby on Rails
- Ruby applications
- Background processing
- CRM systems
- SaaS applications
Official C# and .NET SDK for EmailVerify.io
Integrate email verification into .NET applications and enterprise software.
Repository: Clustox/emailverify-csharp-sdk
Useful for:
- ASP.NET
- .NET APIs
- Enterprise applications
- SaaS platforms
- CRM systems
- Microsoft-based environments
Official PHP SDK for EmailVerify.io
Use EmailVerify.io's email verification API from PHP applications and frameworks.
Repository: Clustox/emailverify-php-sdk
Useful for:
- Laravel
- Symfony
- WordPress
- PHP SaaS applications
- E-commerce platforms
- Lead-generation systems
Official Go SDK for EmailVerify.io
Integrate fast email verification and validation into Go applications and backend services.
Repository: Clustox/emailverify-go
Useful for:
- Go APIs
- Microservices
- High-throughput applications
- Backend infrastructure
- SaaS platforms
Beyond language SDKs, we maintain integrations that make EmailVerify.io available inside automation and AI workflows.
The official EmailVerify.io n8n node enables email verification directly inside automated workflows.
Repository: Clustox/n8n-nodes-emailverify
Use EmailVerify.io inside n8n to:
- Validate new leads
- Check emails before CRM insertion
- Detect disposable email addresses
- Clean marketing data
- Verify form submissions
- Build automated email-validation workflows
The EmailVerify.io MCP project connects email intelligence capabilities with AI agents and MCP-compatible applications.
Repository: Clustox/emailverify-mcp
Potential use cases include:
- AI sales agents
- Lead-enrichment agents
- CRM assistants
- Data-cleaning agents
- Prospecting workflows
- AI-powered business automation
Developers can also integrate directly with the EmailVerify.io Email Verification API.
The API is designed for real-time validation in applications where email quality matters.
Common implementation scenarios include:
Validate an email before creating a new account to reduce fake registrations, typos, disposable addresses, and low-quality signups.
Verify email addresses before adding contacts to HubSpot, Salesforce, or another CRM.
Validate prospect data before adding it to outbound sales or marketing workflows.
Identify invalid and risky addresses before sending campaigns to help reduce hard bounces.
Verify customer email addresses during registration, checkout, or lead capture.
Allow autonomous workflows to validate email addresses before performing outreach or updating customer records.
Explore the API: EmailVerify.io Email Verification API
Our GitHub organization also contains open-source projects and engineering resources beyond EmailVerify.io.
These projects reflect our work across:
- Software engineering
- SaaS development
- AI & automation
- DevOps
- Developer productivity
- Engineering analytics
- Web and mobile development
Our open-source engineering metrics work helps teams understand software delivery performance using DORA-oriented engineering metrics.
The Clustox Engineering Handbook documents engineering practices, standards, and knowledge developed by our teams.
Explore the Engineering Handbook →
Clustox works with startups, growth-stage companies, and enterprises to design, build, modernize, and scale software products.
Our engineering capabilities include:
- Web application development
- Mobile application development
- SaaS product development
- AI & machine learning
- Cloud & DevOps
- API development
- Product engineering
- Quality engineering
- UI/UX
- Staff augmentation
Our open-source work is one way we contribute engineering knowledge, tools, libraries, and integrations back to the developer community.
Contributions to our open-source projects are welcome.
Depending on the repository, you can contribute by:
- Reporting bugs
- Suggesting features
- Improving documentation
- Adding examples
- Submitting pull requests
- Creating framework integrations
- Improving SDK compatibility
Please review the individual repository's contribution guidelines before submitting a pull request.
EmailVerify.io
Website · Email Verification API · API Platform · SDKs & Libraries
Open Source
Python SDK · JavaScript SDK · Ruby SDK · PHP SDK · Go SDK · C#/.NET SDK
n8n Integration · EmailVerify MCP
Built and maintained by the Clustox engineering team.