Validate and score email addresses in real time — syntax, domain/MX, disposable, role-based and typo detection. Every check except SMTP, in a single fast call.

Validate and score email addresses in real time — syntax, domain/MX, disposable, role-based and typo detection. Every check except SMTP, in a single fast call.

License verification API for validating license keys, enforcing activation limits, and preventing key sharing for software, SaaS, plugins, and desktop apps.

A comprehensive identity verification suite providing high-performance tools for document validation and data extraction. MRZ Parser: Fully compliant with ICAO standards (TD1, TD2, TD3, MRVA, MRVB) to extract identity info, document types, and all data from Machine Readable Zones. Document Number Validation: Checksum and format verification for Polish ID cards, Passports, Driving Licenses, and more (9-character alphanumeric support). Polish Identity Validators: Dedicated endpoints for local identifiers: PESEL: National ID number validation. NIP: Tax Identification Number (handles formatted and raw input). REGON: Business registry numbers (supports both 9 and 14-digit formats).

Universal JSON Fix repairs broken or malformed JSON, especially from LLMs like ChatGPT, Claude, Deepseek, Gemini, or Llama. This API ensures reliable parsing by fixing mixed quotes, missing commas, and formatting issues, making it ideal for AI applications.

Simplify your licensing process with our Cloud License Management API for efficient license verification and activation.

Optimize software ownership with our Software Licensing Solutions API for reliable license verification and activation.

License validation backend for Gumroad and direct software sellers. Verify keys, enforce activation limits, and prevent key sharing without building custom infrastructure.

Safeguard digital products with our Digital Product Security API for robust license verification and activation.

Validate license keys quickly with our License Key Validation API for enhanced software security and user control.

Streamline your software's security with our License Key Management API for seamless verification and activation.

Protect your revenue with our Key Sharing Prevention API, ensuring secure license verification and activation processes.

Keyless Nigeria NRS (ex-FIRS) e-invoice validator: official UBL 2.1 XSD, Peppol BIS base rules, Nigerian TIN on both parties, per-line VAT, IRN/CSID/QR clearance blocks. Rule-coded JSON report.

Validate any email address: RFC 5321/5322 syntax, MX record existence via DNS-over-HTTPS, and disposable domain detection. Returns a JSON deliverability guess.

The Structured Data Validator API enables users to validate JSON-LD documents against schema.org standards, ensuring compliance with rich-result support.

This API infers JSON Schemas from sample documents and validates documents against those schemas, ensuring data integrity and structure compliance.

Keyless Malaysia MyInvois (LHDN) e-invoice validator: official UBL 2.1 XSD, code lists, totals math, XAdES signature check. POST XML or JSON, get a rule-coded JSON report. No LHDN account.

Verify Polish identities seamlessly with our dedicated Polish Identity Information Check for MRZ and document numbers.

Handle various documents smoothly with our Multi Document Type Check for MRZ and document numbers.

Streamline your processes using our Document Number Format Validation Check for accurate MRZ and document number formats.

Validate structured data markup on any web page including JSON-LD, Microdata, and RDFa. Detects Schema.org types, checks for errors, and returns detailed validation results.

Guarantee compliance with international standards using our ICAO Standards Compliant Check for MRZ and document numbers.

Validex API provides fast and reliable validation for emails, phone numbers, and IBANs — all in one lightweight service. Perfect for developers who want to integrate secure data validation without complexity. Save time, reduce errors, and keep your applications clean with a single API.

JSON Clean API converts JSON documents into a readable format with line breaks and indentations. It supports entries up to 200,000 characters.

Extracts and validates JSON-LD, Microdata, RDFa, and structured markup from webpages or raw HTML for SEO and technical validation.