apiverve / taxidvalidator

1.2.3 2026-10-26 14:46 UTC

Requires

• php: >=7.4
• guzzlehttp/guzzle: ^7.0

Requires (Dev)

• phpunit/phpunit: ^9.0

MIT

• APIVerve

• api
• ssn validator
• apiverve
• taxidvalidator
• tax id validation api
• tax id verification api
• ssn validation api
• ein validation api

Published on Packagist.org on 2026-10-26 17:31 UTC

README

Tax ID Validator checks US tax identification numbers including SSNs, EINs, and ITINs for structural validity. It accepts formatted or unformatted strings and returns validation results, normalized formatting, masked numbers, and the last four digits.

The Tax ID Validator API provides a simple, reliable way to integrate tax id validator functionality into your applications. Built for developers who need production-ready tax id validator capabilities without the complexity of building from scratch.

View API Details →

Available on:

Quick Start

Using JavaScript

async function callTaxIDValidatorAPI() {
    try {
        const params = new URLSearchParams({
            taxid: '123-45-6789'
        });

        const response = await fetch(`https://api.apiverve.com/v1/taxidvalidator?${params}`, {
            method: 'GET',
            headers: {
                'x-api-key': 'YOUR_API_KEY_HERE'
            }
        });

        const data = await response.json();
        console.log(data);
    } catch (error) {
        console.error('Error:', error);
    }
}

callTaxIDValidatorAPI();

Using cURL

curl -X GET "https://api.apiverve.com/v1/taxidvalidator?taxid=123-45-6789" \
  -H "x-api-key: YOUR_API_KEY_HERE"

Get your API key: https://apiverve.com

📁 For more examples, see the examples folder

Installation

Choose your preferred programming language:

📦 NPM (JavaScript/Node.js)

npm install @apiverve/taxidvalidator

View NPM Package → | Package Code →

🔷 NuGet (.NET/C#)

dotnet add package APIVerve.API.TaxIDValidator

View NuGet Package → | Package Code →

🐍 Python (PyPI)

pip install apiverve-taxidvalidator

View PyPI Package → | Package Code →

💎 Ruby (RubyGems)

gem install apiverve_taxidvalidator

View RubyGems Package → | Package Code →

🐘 PHP (Packagist)

composer require apiverve/taxidvalidator

View Packagist Package → | Package Code →

🎯 Dart (pub.dev)

dart pub add apiverve_taxidvalidator

View pub.dev Package → | Package Code →

🤖 Android (JitPack)

implementation 'com.github.apiverve:taxidvalidator-api:1.0.0'

Package Code →

🐹 Go

go get github.com/apiverve/taxidvalidator-api/go

Package Code →

Why Use This API?

Feature	Benefit
Multi-language SDKs	Native packages for JavaScript, Python, C#, Go, and Android
Simple Integration	Single API key authentication, consistent response format
Production Ready	99.9% uptime SLA, served from 24 global regions
Comprehensive Docs	Full examples, OpenAPI spec, and dedicated support

Documentation

• 🏠 API Home: Tax ID Validator API
• 📚 API Reference: docs.apiverve.com/ref/taxidvalidator
• 📖 OpenAPI Spec: openapi.yaml
• 💡 Examples: examples/

What Can You Build?

The Tax ID Validator API is commonly used for:

• Web Applications - Add tax id validator features to your frontend or backend
• Mobile Apps - Native SDKs for Android development
• Automation - Integrate with n8n, Zapier, or custom workflows
• SaaS Products - Enhance your product with tax id validator capabilities
• Data Pipelines - Process and analyze data at scale

API Reference

Authentication

All requests require an API key in the header:

x-api-key: YOUR_API_KEY_HERE

Get your API key: https://apiverve.com

Response Format

Every APIVerve endpoint returns the same envelope — check status, then read data:

{
  "status": "ok",
  "error": null,
  "data": { ... }
}

Example Response

A real response from the Tax ID Validator API:

{
  "status": "ok",
  "error": null,
  "data": {
    "valid": true,
    "taxid": "123-45-6789",
    "type": "SSN",
    "type_full": "Social Security Number",
    "format": "XXX-XX-XXXX",
    "normalized": "123-45-6789",
    "digits_only": "123456789",
    "masked": "***-**-6789",
    "last4": "6789",
    "is_placeholder": true,
    "validation_details": {
      "format_valid": true,
      "area_number_valid": true,
      "group_number_valid": true,
      "serial_number_valid": true
    },
    "risk_score": 35,
    "risk_level": "medium",
    "error": null
  }
}

Support & Community

• 🏠 API Home: Tax ID Validator API
• 💬 Support: https://apiverve.com/contact
• 🐛 Issues: GitHub Issues
• 📖 Documentation: https://docs.apiverve.com
• 🌐 Website: https://apiverve.com

Contributing

We welcome contributions! Please see CONTRIBUTING.md for guidelines.

Security

For security concerns, please review our Security Policy.

License

This project is licensed under the MIT License - see the LICENSE file for details.

Acknowledgments

Built with ❤️ by APIVerve

Copyright © 2026 APIVerve. All rights reserved.