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Best json-ld checker APIs

License Verification and Activation API

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

Security & Cybersecurity Free 7-Day Trial

100% uptime 210ms avg MCP ready

Spell and Grammar Checker API

This API is able to detect any spelling or grammar errors in your application. Submit text and receive a JSON response with potential errors and suggested corrections.

Natural Language Processing (NLP) Free 7-Day Trial

100% uptime 174ms avg MCP ready

Cloud License Management License Verification and Activation API

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

Security & Cybersecurity Free 7-Day Trial

100% uptime 282ms avg MCP ready

Software Licensing Solutions License Verification and Activation API

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

Security & Cybersecurity Free 7-Day Trial

100% uptime 129ms avg MCP ready

Digital Product Security License Verification and Activation API

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

Security & Cybersecurity Free 7-Day Trial

100% uptime 314ms avg MCP ready

Key Sharing Prevention License Verification and Activation API

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

Security & Cybersecurity Free 7-Day Trial

100% uptime 315ms avg MCP ready

License Key Validation License Verification and Activation API

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

Security & Cybersecurity Free 7-Day Trial

100% uptime 294ms avg MCP ready

Schema Markup Validator API

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.

Data & Analytics Free 7-Day Trial

100% uptime 223ms avg MCP ready

Universal JSON Fix

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.

Tools & Utilities Free 7-Day Trial

100% uptime 13ms avg MCP ready

Language Checker API

The Language Checker API identifies the language of a text quickly and accurately, facilitating content customization and translation.

Natural Language Processing (NLP) Free 7-Day Trial

100% uptime 687ms avg MCP ready

Trusted Email Checker API

Validate and verify email addresses securely to enhance user trust and reduce fraud with our Trusted Email Checker API.

Security & Cybersecurity Free 7-Day Trial

100% uptime 63ms avg MCP ready

SSL Check API

This API verifies SSL certificates from any website and returns their validity, dates, issuer, protocol, fingerprints, and authorized domains.

Security & Cybersecurity Free 7-Day Trial

100% uptime 800ms avg MCP ready

Multilingual Detector API

The Multilingual Detector API is a tool that allows users to determine the language of a given piece of text with a confidence score.

Natural Language Processing (NLP) Free 7-Day Trial

100% uptime 607ms avg MCP ready

DNS Checker Information API

The DNS Checker Information API verifies DNS records for any domain and record type, providing fast, accurate and globally updated results.

Data & Analytics Free 7-Day Trial

100% uptime 863ms avg MCP ready

SSL Certificate Checker API

Be able to verify and validate any SSL certificate present on a website. Receive extensive information about the host

Security & Cybersecurity Free 7-Day Trial

100% uptime 898ms avg MCP ready

SSL Certificate Check API

Ensure secure connections with our SSL Certificate Check API for easy certificate management.

Security & Cybersecurity Free 7-Day Trial

100% uptime 505ms avg MCP ready

Linguistic Detector API

The Linguistic Detector API reliably identifies the language of text, offering immediate multilingual support to enhance user interactions, ensure content moderation, and bolster global applications.

Natural Language Processing (NLP) Free 7-Day Trial

100% uptime 1,376ms avg MCP ready

Active Domains Detector API

Quickly confirm domain availability with our API. Effortlessly find the perfect domain name for your website or business.

Commerce & eCommerce Free 7-Day Trial

100% uptime 1,090ms avg MCP ready

Domain Registry Checker API

Check domain availability instantly with our API. Find the perfect domain name for your website or business effortlessly.

Market Data & Trading Free 7-Day Trial

100% uptime 1,115ms avg MCP ready

Lite Phishing Checker API

The Lite Phishing Checker API is a powerful tool that allows you to check URLs and determine if they are known phishing attempts. With this API, you can easily validate and safeguard against potential phishing threats by quickly identifying suspicious URLs.

Security & Cybersecurity Free 7-Day Trial

100% uptime 1,278ms avg MCP ready

Jewish Content Moderator API

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.

Legal & Compliance Free 7-Day Trial