Crawler access (robots.txt)
2/2 · pass
8 of 8 AI crawlers may read the site, 0 disallowed
- GET /robots.txt -> HTTP 200, 1.5 KB, 4 user-agent groups
- Allowed: GPTBot (1 path rule), ClaudeBot (1 path rule), OAI-SearchBot (via *) (7 path rules), PerplexityBot (1 path rule), Google-Extended (via *) (7 path rules), Amazonbot (via *) (7 path rules), CCBot (via *) (7 path rules), Bytespider (via *) (7 path rules)
- Content-Signal: ai-train=no, search=yes, ai-input=yes; ai-train=no, search=yes, ai-input=yes; ai-train=no, search=yes, ai-input=yes; ai-train=no, search=yes, ai-input=yes
- Sitemap declared: https://21st.dev/sitemap.xml
Fix: Nothing to fix here.
Machine-readable surfaces
2/2 · pass
3 of 7 surfaces present (/llms.txt, /sitemap.xml, /openapi.json)
- /llms.txt: HTTP 200, 12 KB of text
- /sitemap.xml: HTTP 200, XML sitemap (>64 KB)
- /.well-known/x402: HTTP 404
- /.well-known/agent-card.json: HTTP 404
- /.well-known/mcp-registry-auth: HTTP 200 but binary content (application/octet-stream)
- /openapi.json: HTTP 200, valid JSON (OpenAPI 3.0.3)
- /ai.txt: HTTP 404
Fix: Nothing to fix here.
Readable without JavaScript
2/2 · pass
Home page is readable
- GET https://21st.dev/ -> HTTP 200, text/html, 193 KB
- 5,441 characters of visible text with scripts, styles and tags removed; <title>: "React Components, Templates & Themes — 12,000+ Crafted UI | 21st | 21st"
- 50 external scripts, 9 inline; <noscript> present
- first words: "Log in Sign up Components Templates Themes Pricing The living library of interfaces 12,000+ crafted React components, templates, and shadcn ..."
Fix: Nothing to fix here.
Structured data
2/2 · pass
3 JSON-LD blocks, Open Graph complete
- 3 JSON-LD blocks: @type Organization, WebSite, FAQPage, Question
- Open Graph: og:title "React Components, Templates & Themes — 12,000+ Crafted UI | 21st"; og:description present
- meta description: present
Fix: Nothing to fix here.
Legal notices (TAKE IT DOWN desk check)
not measured
Unavailable
- takeitdown.agentexchange.work/check.json: refused takeitdown.agentexchange.work: hosts on agentexchange.work cannot be graded from inside the same Cloudflare zone; every check would - unavailable
Fix: Re-run in a few minutes; the notice check could not be completed.
MCP census entry (index.agentexchange.work)
0/2 · fail
Not selling to agents: no census entry, no /mcp endpoint
- census unavailable (refused index.agentexchange.work: hosts on agentexchange.work cannot be graded from inside the same Cloudflare zone; every check would time )
- GET /mcp -> HTTP 200 HTML page (catch-all route, not an MCP endpoint)
Fix: Expose a Streamable HTTP MCP endpoint at /mcp (or a paid x402 route) so agents can call you, not just read you.
$49 AI Visibility Full Report
This grade is free and automated. The paid next step is the $49 AI Visibility Full Report (which brands a representative AI model, standing in for ChatGPT-class assistants, names when buyers ask about your category, with a prioritized fix list) from aivisibility.agentexchange.work, run for 21st.dev. It includes:
- 8 real buyer questions tested across ChatGPT-class models
- Competitor share-of-voice: who AI names, how often, versus you
- Full GEO site audit with prioritized, specific fixes
- Agent-Readiness Score: crawler access, llms.txt, schema, discovery manifest
- Custom 30/60/90-day action plan to get cited by ChatGPT, Perplexity and Google AI Overviews
- Shareable report, generated in about 60 seconds after checkout
Get the Full Report — $49 Stripe checkout asks for your brand name and category; the report is ready about 60 seconds after payment. Legal notices and the MCP census entry are not in this report (free: Compliance Desk check, census claim).
