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Machine-Readable Discovery tools

tools.json, API, sitemap

Free tools.json Validator – tools.json Checker

Free tools.json validator and tools.json checker. Validate structure for AI discovery. AI agents use tools.json. No signup.

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API Status Checker

Check if your site exposes machine-readable status or API list. AI systems use it to discover endpoints. Free discovery checker.

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Sitemap for AI Pages

Check if sitemap includes AI-relevant pages (guides, tools, llms.txt). Free sitemap checker for AI discoverability.

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Browse more categories

Audit & ReportsAI Crawler Accessllms.txtStructured Content for AIMeta & Snippets for AISpeed & AccessibilityCitations & Trust

Explore

  • Home
  • Trust & scam checks
  • Data & format validators
  • SEO tools
  • Security tools
  • AI visibility tools
  • Guides
  • Developers & API
  • Pricing
  • About

Data & API validators

  • JSON validator
  • AI output JSON checker
  • JSON formatter
  • XML validator
  • YAML validator
  • CSV validator
  • API response checker
  • HTML validator
  • CSS validator
  • SOAP response validator

Trust & safety tools

  • Website checker
  • Email validator
  • URL safety
  • Phishing URL detector
  • SSL checker
  • HTTP header analyzer
  • SEO audit
  • AI visibility analyzer

ValidateThis

Free online validators for JSON, XML, APIs, and web metadata — plus trust checks for links, email, and entities. Built for developers and fraud/ops triage.

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“Discover more” lists, fullscreen promos, or other in-page ad units are usually Google AdSense, not part of the validator UI. See advertising in our Privacy policy.

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