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

Validate phone numbers worldwide, detect carrier, line type, country, formatting, mobile status, timezone, and numbering validity with accurate, structured responses.

Effortlessly crawl developer documentation from platforms like Docusaurus, GitBook, Mintlify, and ReadMe to extract pristine, token-efficient GitHub-Flavored Markdown, optimized for use with Cursor, Copilot, and Retrieval-Augmented Generation (RAG) applications.

Extract and validate JSON-LD structured data and Microdata against Schema.org standards. Detects Product, Organization, FAQPage, Article, and JobPosting schemas with missing field diagnostics.

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.

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

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

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.

Email Validation API ensures data accuracy by verifying email addresses in real-time, reducing bounce rates, enhancing security, and cutting costs.

Validate emails, phone numbers, URLs, and IP addresses through a simple REST API — a lightweight developer validation toolkit.

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

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.

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.

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.

The accurate validation API provides multiple functions to validate emails, phone numbers, URLs, IP addresses, postal codes and other common data formats.

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

Ensure accuracy with our Phone and Email Data Validation API for reliable contact information.

Optimize outreach with the Phone Number and Email Checker API, confirming contacts effortlessly.

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

Checks product feeds for required fields, empty values, malformed URLs, duplicate IDs, price format, availability, condition, identifiers, descriptions, image links, score, grade, issues, and fix hints.

The Single Validation API does validation on a single email address, disposable email/free email provider and returns all the validation results in either JSON or XML format.

AI-powered Jewish content moderation API. Analyzes text across 7 Halachic compliance categories using Torah, Talmud, and Shulchan Aruch. Returns compliance score, severity level, and rabbinical notes.