{"slug":"official-mcp-registry","name":"Official MCP Registry","domain":"registry.modelcontextprotocol.io","category":{"slug":"mcp-registry","name":"MCP Registries / Discovery"},"usageMode":"integrated","score":81,"scoreLow":50,"scoreHigh":100,"unassessed":["phone_verification_call","mailed_physical_code","contact_sales_wall","manual_approval_queue","rate_limit_manual_review","account_payment_provisioning","kyc_identity_verification","crypto_wallet_custody_setup"],"propertyStates":{"sms_otp":"success","email_otp":"success","tos_bot_ban":"success","captcha_challenge":"success","contact_sales_wall":"unassessed","sso_only_no_api_key":"success","mailed_physical_code":"unassessed","no_machine_interface":"success","manual_approval_queue":"unassessed","phone_verification_call":"unassessed","redirect_to_vendor_site":"success","rate_limit_manual_review":"unassessed","kyc_identity_verification":"unassessed","crypto_wallet_custody_setup":"unassessed","account_payment_provisioning":"unassessed"},"badge":"LOW_INTERRUPT","machineReadabilityScore":30.21,"compositeScore":56,"custodyRiskFlag":"unknown","confidenceLabel":"PROVISIONAL","lastProbedAt":"2026-08-09T23:51:06.137Z","status":"active","homepageUrl":"https://registry.modelcontextprotocol.io","description":"Canonical, community-driven MCP server metadata registry","machineReadabilityBreakdown":[{"id":"llms_txt","label":"llms.txt","status":"fail"},{"id":"llms_full_txt","label":"llms-full.txt","status":"fail"},{"id":"agents_md","label":"AGENTS.md","status":"fail"},{"id":"agent_card","label":"A2A agent card","status":"fail"},{"id":"mcp_server","label":"MCP server (well-known or official registry)","status":"fail","evidence":"no /.well-known/mcp.json and no match in the official MCP registry"},{"id":"openapi_spec","label":"OpenAPI/Swagger spec","status":"pass","evidence":"https://registry.modelcontextprotocol.io/openapi.json"},{"id":"rate_limit_headers","label":"Rate-limit headers","status":"fail"},{"id":"structured_errors","label":"Structured JSON error responses","status":"not_checked","evidence":"no error response was sampled during this probe"},{"id":"oauth_metadata","label":"OAuth authorization-server metadata (RFC 8414)","status":"fail"},{"id":"api_catalog","label":"API catalog (RFC 9727) (emerging)","status":"fail"},{"id":"payment_protocol","label":"Agent-payment discovery (x402 / UCP) (emerging)","status":"fail"},{"id":"page_byte_weight","label":"Lean HTML transfer size","status":"pass","evidence":"24 KB raw HTML (threshold 488 KB)"},{"id":"dom_node_count","label":"Manageable DOM size","status":"pass","evidence":"850 DOM nodes (threshold 1500)"},{"id":"content_density","label":"High content-to-markup density","status":"fail","evidence":"1.7% text/HTML (398 chars in 24 KB, threshold 2%)"},{"id":"js_dependence","label":"Content readable without JS execution","status":"fail","evidence":"raw HTML holds 3% of rendered text (398 vs 15141 chars; threshold 40%)"},{"id":"clean_content_path","label":"Clean-content alternate (RSS/Atom/feed/markdown)","status":"fail","evidence":"no <link rel=alternate> feed/markdown variant"},{"id":"markdown_content","label":"Serves markdown on Accept: text/markdown","status":"fail","evidence":"returned text/html; charset=utf-8 (not markdown)"},{"id":"semantic_interactive","label":"Interactive elements are semantic","status":"pass","evidence":"17/17 semantic (100%); 0 div/span click targets"},{"id":"form_field_names","label":"Form fields have accessible names","status":"pass","evidence":"7/7 named (100%)"},{"id":"input_autocomplete","label":"Inputs carry autocomplete hints","status":"fail","evidence":"0/2 with autocomplete (0%)"},{"id":"webmcp","label":"WebMCP tools (modelContext API)","status":"fail","evidence":"no document/navigator.modelContext tool registration observed"},{"id":"retrieval_bot_access","label":"AI retrieval/search fetchers allowed (robots.txt)","status":"pass","evidence":"no robots.txt — retrieval fetchers unrestricted"},{"id":"sitemap_xml","label":"Sitemap (indexability)","status":"fail","evidence":"no robots.txt Sitemap: directive and no /sitemap.xml"},{"id":"schema_org_jsonld","label":"schema.org JSON-LD in raw HTML","status":"fail","evidence":"no valid JSON-LD in raw (pre-JS) HTML — invisible to non-rendering fetchers"},{"id":"content_signals","label":"Content-Signal directives (robots.txt)","status":"fail","evidence":"no robots.txt — no Content-Signal declarations"},{"id":"web_bot_auth","label":"Web Bot Auth key directory (emerging)","status":"fail"},{"id":"link_header_discovery","label":"Discovery Link headers on homepage (emerging)","status":"fail","evidence":"no Link header on the homepage response"},{"id":"robots_ai_crawlers","label":"robots.txt AI-crawler access","status":"pass","evidence":"no robots.txt — no crawler restrictions"},{"id":"unauthed_api_error_shape","label":"Unauthenticated API error is structured JSON","status":"pass","evidence":"https://registry.modelcontextprotocol.io/openapi.json (HTTP 200)"},{"id":"unauthed_api_auth_guidance","label":"Unauthenticated API returns auth guidance (401/403 or documented)","status":"fail","evidence":"https://registry.modelcontextprotocol.io/openapi.json (HTTP 200)"},{"id":"unauthed_api_rate_limit","label":"API exposes rate-limit headers","status":"fail","evidence":"no RateLimit-* / X-RateLimit-* headers on the sampled response"},{"id":"api_key_self_serve","label":"API key obtainable without human interaction","status":"pass","evidence":"OpenAPI spec published and signup is not SSO-only"}],"confidence":0.55,"rubricVersion":"rubric@2026.4","tiersTested":{"tier0":true,"tier1":true,"tier2":false,"tier2Complete":false},"flags":{"tosBan":false,"hardBlocker":false,"contactSalesOnly":false,"perTxnHardBlocker":false},"scoreHistory":[{"score":81,"badge":"LOW_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.4","isCurrent":true,"createdAt":"2026-08-09T23:51:06.771Z"},{"score":81,"badge":"LOW_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.4","isCurrent":false,"createdAt":"2026-08-09T23:51:05.448Z"},{"score":81,"badge":"LOW_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.4","isCurrent":false,"createdAt":"2026-08-09T17:13:21.658Z"},{"score":88,"badge":"LOW_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.3","isCurrent":false,"createdAt":"2026-08-09T05:27:51.444Z"},{"score":88,"badge":"LOW_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.3","isCurrent":false,"createdAt":"2026-08-09T05:27:50.908Z"},{"score":88,"badge":"LOW_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.3","isCurrent":false,"createdAt":"2026-08-09T03:14:06.196Z"},{"score":88,"badge":"LOW_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.2","isCurrent":false,"createdAt":"2026-08-09T01:50:22.545Z"},{"score":88,"badge":"LOW_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.2","isCurrent":false,"createdAt":"2026-08-09T01:45:29.743Z"},{"score":100,"badge":"LOW_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.1","isCurrent":false,"createdAt":"2026-07-10T07:18:35.493Z"}],"findings":[]}