Is builtwith.com agent ready?
builtwith.com is partly agent ready: it scores 54/100 (grade C) on the w2agent rubric. Weakest areas: Agent Auth (20), Agent Protocols (37), Structured Data (41).
Changed since last check
+14 points since the previous check (2026-09-16)
Fixed: FAQ content, Response time, XML sitemap exists, llms.txt exists, Token efficiency (HTML-to-text ratio), Reachable as ChatGPT-User, Reachable as Perplexity-User
Regressed: OpenGraph meta tags, Canonical URLs
Changed: Appropriate Schema.org type (fail → partial), Schema.org JSON-LD present (fail → partial), Schema.org completeness (fail → partial)
Files added: sitemap.xml, llms.txt
Category scores
Technical
91
Agent Auth
20
Agent Discovery
55
Agent Protocols
37
Content Quality
62
Structured Data
41
Bot Accessibility
94
Agent protocol panel
- A2A agent cardPresent
- OAuth discoveryNot found
- 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 scorederror
- ✓robots.txt existspass
- ✗Content negotiation (Markdown)fail
- ✓Declared AI usage preferencestracked, not scoredpass
Structured Data
- ~OpenGraph meta tagspartial
- ~Semantic HTML elementspartial
- ~Appropriate Schema.org typepartial
- ✓JSON-LD validpass
- ✗Heading hierarchyfail
- ~Schema.org JSON-LD presentpartial
- ~Schema.org completenesspartial
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 infopass
Agent Discovery
- ✓llms.txt follows specpass
- ✓llms.txt existspass
- —MCP server cardtracked, not scoredskip
- ✗Markdown alternate linksfail
- ~/.well-known/agent-card.jsonpartial
- ~llms.txt links resolvepartial
Agent Protocols
- ✗Discoverable API endpointsfail
- ✗MCP endpointfail
- ✗Action schemasfail
- ✗/.well-known/ucpfail
- ✓Structured formspass
- —WebMCP imperative APItracked, not scoredskip
- ✓WebMCP declarative APItracked, not scoredpass
- ✓Reachable as Google-Agentpass
- ✓Reachable as ChatGPT-Userpass
- ✓Reachable as Perplexity-Userpass
Agent Auth
- —MCP authorization (401 challenge → protected resource metadata)skip
- —PKCE S256 supportskip
- ✓Public API surfacepass
- —Client ID Metadata Documents (bonus)skip
- ✗OpenAPI specificationfail
- —Agent/bot auth documentationskip
- ✗OAuth discovery chain (RFC 9728 → RFC 8414)fail
- ✗Developer portalfail
- —Scoped API permissionsskip
- ✗API catalog (RFC 9727)fail
- ✗Agent operator signing directorytracked, not scoredfail
Technical
- ✓HTTPSpass
- ✓UTF-8 charsetpass
- ~Canonical URLspartial
- ✓Mobile viewportpass
- ✓Content accessible without JSpass
- ✓Security headerspass
Other
- —ecommerce-gtin-validskip
- —ecommerce-product-schemaskip
- ✓ecommerce-checkout-accessiblepass
Score history
- 54/100 · rubric v3.0
- 40/100 · rubric v3.0
- 47/100 · rubric v3.0
- 52/100 · rubric v2.0
- 52/100 · rubric v2.0
- 52/100 · rubric v2.0
- 52/100 · rubric v2.0
- 52/100 · rubric v2.0