Is once-ui.com agent ready?
once-ui.com is partly agent ready: it scores 50/100 (grade C) on the w2agent rubric.
Changed since last check
No change in score since the previous check (2026-09-15)
Category scores
Category breakdown not recorded for this audit.
Agent protocol panel
- A2A agent cardNot found
- OAuth discoveryNot measured
- MCP discoveryNot found
- llms.txt validityPresent
Check results
Bot Accessibility
- ✓No error status codespass
- ✓Response timepass
- ✓XML sitemap existspass
- ✓AI agent accesspass
- ✓Edge treatment of agent user-agentstracked, not scoredpass
- ✓robots.txt existspass
- ✓Content negotiation (Markdown)pass
- ✓Declared AI usage preferencestracked, not scoredpass
Structured Data
- ✓OpenGraph meta tagspass
- ~Semantic HTML elementspartial
- ✗Appropriate Schema.org typefail
- —JSON-LD validskip
- ~Heading hierarchypartial
- ✗Schema.org JSON-LD presentfail
- ✗Schema.org completenessfail
Content Quality
- ✓FAQ contentpass
- ✓Answer-first contentpass
- ✓Content lengthpass
- ✓Token efficiency (HTML-to-text ratio)pass
- ✗Freshness signalsfail
- ✗Author attributionfail
- ✓Citation readinesspass
- ~Lists and tables for structured infopartial
Agent Discovery
- ✓llms.txt follows specpass
- ✓llms.txt existspass
- —MCP server cardtracked, not scoredskip
- ✗Markdown alternate linksfail
- ✗/.well-known/agent-card.jsonfail
- ~llms.txt links resolvepartial
Agent Protocols
- ✗Discoverable API endpointsfail
- ✗MCP endpointfail
- ✗Action schemasfail
- —/.well-known/ucpskip
- —Structured formsskip
- —WebMCP imperative APItracked, not scoredskip
- —WebMCP declarative APItracked, not scoredskip
- ✓Reachable as Google-Agentpass
- ✓Reachable as ChatGPT-Userpass
- ✓Reachable as Perplexity-Userpass
Agent Auth
- —MCP authorization (401 challenge → protected resource metadata)skip
- ✗PKCE S256 supportfail
- ✗Public API surfacefail
- —Client ID Metadata Documents (bonus)skip
- —OpenAPI specificationskip
- ✗Agent/bot auth documentationfail
- —OAuth discovery chain (RFC 9728 → RFC 8414)skip
- ~Developer portalpartial
- ✗Scoped API permissionsfail
- ✓API catalog (RFC 9727)pass
- —Agent operator signing directorytracked, not scoredskip
Technical
- ✓HTTPSpass
- ✓UTF-8 charsetpass
- ✗Canonical URLsfail
- ✓Mobile viewportpass
- ✓Content accessible without JSpass
- ✓Security headerspass
Other
- ✓nextjs-metadata-apipass
- ✓nextjs-static-generationpass
- ✗nextjs-well-known-servedfail
Score history
- 50/100 · rubric v3.0
- 50/100 · rubric v3.0
- 46/100 · rubric v2.0
- 46/100 · rubric v2.0
- 46/100 · rubric v2.0
- 46/100 · rubric v2.0