Free SEO, AI visibility (AI crawlers, llms.txt, JSON-LD) and security-header checks for any URL.
Scored across 6 tools
Each tool has a recognizable primary axis: single-URL SEO, single-URL security, AI-crawler visibility, bulk quick check, competitor comparison, and site crawl. The main risk is overlap between seo_check, bulk_check and full_site_crawl, which all report title/description/H1/canonical/noindex — only scale and depth separate them, and ai_visibility_check also touches robots.txt, sitemap and JSON-LD that seo_check covers.
All names are lowercase snake_case and readable at a glance, with a consistent noun+check/crawl pattern (seo_check, security_headers_check, bulk_check, full_site_crawl). The one deviation is compare_competitors, which uses a verb-first form rather than the dominant noun-first convention.
Six tools is well within the ideal 3-15 range and each one occupies a distinct slot (single-page, bulk, crawl, competitor, security, AI visibility). Nothing looks redundant or like filler, even though three tools share a paid-key gate.
The surface covers the core audit workflow well: diagnose one page, scale to a site, compare against competitors, and check AI/security posture. Gaps are explicit rather than hidden — no backlink/domain-authority metrics, no Core Web Vitals beyond server response time, and no saved history or scheduled re-checks for tracking changes over time.
Checks whether AI crawlers and AI search tools (ChatGPT, Claude, Perplexity, Google AI Overviews, Copilot) can read and cite a public URL: robots.txt rules for GPTBot, OAI-SearchBot, ChatGPT-User, ClaudeBot, Claude-SearchBot, PerplexityBot, Google-Extended, CCBot, Applebot-Extended and Bytespider; text and H1 in the raw server HTML; llms.txt and llms-full.txt; JSON-LD types; title, description, Open Graph, canonical, sitemap; nosnippet/noindex; and agent readiness: loads the page with the User-Agents of OAI-SearchBot, ChatGPT-User, Claude-SearchBot, PerplexityBot, GPTBot and ClaudeBot to catch firewall/CDN blocks robots.txt doesn't show, Content Signals, Link headers, Markdown negotiation (Accept: text/markdown), WebMCP forms and registerTool calls, and MCP server card, AI catalog and API catalog discovery. Passive GETs of public URLs only. Returns a 0-100 score and fixes.
Inputs: url (required).
Quick on-page check of up to 10 URLs in one call: HTTP status, title, meta description, H1, canonical, noindex, lang, Open Graph and thin content. Requires a paid API key (Authorization: Bearer , $15 per 3 months): https://audit.huutran.dev/mcp-server#pro
Inputs: urls (required).
Side-by-side on-page, AI-crawler and security-header signals for your page and up to 3 competitor pages: response time, title and description length, H1, word count, JSON-LD types, llms.txt, AI crawlers blocked in robots.txt, security headers. No backlink or domain-authority metrics. Requires a paid API key (Authorization: Bearer , $15 per 3 months): https://audit.huutran.dev/mcp-server#pro
Inputs: url (required), competitors (required).
Crawls up to 25 pages of a public site (from its XML sitemap, or homepage links) and checks each for title, meta description, H1, canonical, noindex, html lang, Open Graph, thin content and HTTP errors, plus site-wide duplicate titles and descriptions. Requires a paid API key (Authorization: Bearer , $15 per 3 months): https://audit.huutran.dev/mcp-server#pro
Inputs: url (required), max_pages.
Passive security check of one public URL: one ordinary page load plus public DNS. Grades HTTPS, HSTS, Content-Security-Policy, clickjacking protection, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, version-leaking headers, cookie flags, SPF, DMARC, DKIM, CAA and DNSSEC from A to F, with a fix for each issue. Not a vulnerability scan.
Inputs: url (required).
On-page SEO check of one public URL: title, meta description, H1, canonical, Open Graph, lang, viewport, noindex, word count and empty JavaScript app shells, robots.txt, XML sitemap, HTTPS, server response time and HTML size. Returns a 0-100 score and a plain-English fix for each issue.
Inputs: url (required).
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
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Free AI-readiness audit of any URL: AI crawler rules, JS-free text, JSON-LD, llms.txt. Tool catalog.
HTTP, DNS, SSL, WHOIS, ping, security-header, SEO and AI-readiness checks for any website.
Free check whether a website is technically open to AI assistants (AI crawlers, llms.txt, JSON-LD).
Scan and fix your site's AI discoverability: crawler access, llms.txt, JSON-LD. Free.
Add one secure layer between your agents and this server.