Tax ID Validator API
Tax ID Validator is a comprehensive tool for validating US Tax IDs including Social Security Numbers (SSN), Employer Identification Numbers (EIN), and Individual Taxpayer Identification Numbers (ITIN).
Live Test API
Try out the Tax ID Validator with a live request and see the response in real-time.
API Request
API Response
12345678910111213141516171819202122{ "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", "validation_details": { "format_valid": true, "area_number_valid": true, "group_number_valid": true, "serial_number_valid": true }, "error": null } }
Multiple Access Methods
REST API with multiple response formats, GraphQL, and MCP for AI agents
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JavaScript Object Notation
XML
Extensible Markup Language
YAML
Human-readable data format
CSV
Comma-separated values
GraphQL
Query language for APIs
MCP
AI agent integration
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Frequently Asked Questions
Get answers to common questions about the Tax ID Validator API
What does the Tax ID Validator API do?
Tax ID Validator is a comprehensive tool for validating US Tax IDs including Social Security Numbers (SSN), Employer Identification Numbers (EIN), and Individual Taxpayer Identification Numbers (ITIN). The API returns structured data in JSON, XML, or YAML format, making it easy to integrate into any application or workflow.
How fast is the Tax ID Validator API?
The Tax ID Validator API has an average response time of 153ms, with a median (p50) of 147ms and 99th percentile of 190ms. Our infrastructure maintains 99.9% uptime with servers distributed globally for low latency.
How much does the Tax ID Validator API cost?
Each call to the Tax ID Validator API uses 1 credit. The free tier includes 100 credits per month. Paid plans start at $29.99/month with higher limits, and enterprise plans offer custom pricing with priority support.
How do I authenticate Tax ID Validator API requests?
Include your API key in the request header as X-API-Key: your_key_here. All requests are made over HTTPS for security. You can get your API key by signing up for a free account.
What HTTP methods does Tax ID Validator support?
The Tax ID Validator API supports GET requests. Simply pass your parameters as query strings in the URL. Check our documentation for detailed parameter specifications.
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