{"slug":"polygon-io","name":"Polygon.io","domain":"polygon.io","category":{"slug":"dev-api","name":"Developer / Data APIs"},"usageMode":"integrated","score":60,"scoreLow":28.8,"scoreHigh":78.8,"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":"partial","mailed_physical_code":"unassessed","no_machine_interface":"failed","manual_approval_queue":"unassessed","phone_verification_call":"unassessed","redirect_to_vendor_site":"failed","rate_limit_manual_review":"unassessed","kyc_identity_verification":"unassessed","crypto_wallet_custody_setup":"unassessed","account_payment_provisioning":"unassessed"},"badge":"MODERATE_INTERRUPT","machineReadabilityScore":43.06,"compositeScore":52,"custodyRiskFlag":"unknown","confidenceLabel":"VERIFIED_PARTIAL","lastProbedAt":"2026-08-10T00:39:47.691Z","status":"active","homepageUrl":"https://polygon.io","description":"Self-serve financial market data API","machineReadabilityBreakdown":[{"id":"llms_txt","label":"llms.txt","status":"pass","evidence":"https://polygon.io/llms.txt (42.1 KB, 211 links)"},{"id":"llms_full_txt","label":"llms-full.txt","status":"pass","evidence":"https://polygon.io/llms-full.txt (956.4 KB, 94 links)"},{"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":"fail"},{"id":"rate_limit_headers","label":"Rate-limit headers","status":"fail"},{"id":"structured_errors","label":"Structured JSON error responses","status":"fail","evidence":"sampled 8 error response(s); none returned structured JSON"},{"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":"361 KB raw HTML (threshold 488 KB)"},{"id":"dom_node_count","label":"Manageable DOM size","status":"pass","evidence":"937 DOM nodes (threshold 1500)"},{"id":"content_density","label":"High content-to-markup density","status":"fail","evidence":"2.0% text/HTML (7336 chars in 361 KB, threshold 2%)"},{"id":"js_dependence","label":"Content readable without JS execution","status":"pass","evidence":"raw HTML holds 96% of rendered text (7336 vs 7612 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":"67/67 semantic (100%); 0 div/span click targets"},{"id":"form_field_names","label":"Form fields have accessible names","status":"not_checked","evidence":"no form fields on the representative page"},{"id":"input_autocomplete","label":"Inputs carry autocomplete hints","status":"not_checked","evidence":"no autocomplete-eligible inputs"},{"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 retrieval-fetcher blocks in robots.txt"},{"id":"sitemap_xml","label":"Sitemap (indexability)","status":"pass","evidence":"https://massive.com/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 Content-Signal lines in robots.txt"},{"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":"Link header present but no discovery rel (saw: preload)"},{"id":"robots_ai_crawlers","label":"robots.txt AI-crawler access","status":"pass","evidence":"no AI-crawler blocks in robots.txt"},{"id":"unauthed_api_error_shape","label":"Unauthenticated API error is structured JSON","status":"fail","evidence":"https://api.polygon.io/ (HTTP 404)"},{"id":"unauthed_api_auth_guidance","label":"Unauthenticated API returns auth guidance (401/403 or documented)","status":"fail","evidence":"https://api.polygon.io/ (HTTP 404)"},{"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":"not_checked","evidence":"no OpenAPI spec found; self-serve API-key path indeterminate from Tier 1"}],"confidence":0.75,"rubricVersion":"rubric@2026.4","tiersTested":{"tier0":true,"tier1":true,"tier2":true,"tier2Complete":false},"flags":{"tosBan":false,"hardBlocker":true,"contactSalesOnly":false,"perTxnHardBlocker":false},"scoreHistory":[{"score":60,"badge":"MODERATE_INTERRUPT","confidenceLabel":"VERIFIED_PARTIAL","rubricVersion":"rubric@2026.4","isCurrent":true,"createdAt":"2026-08-10T00:39:47.705Z"},{"score":60,"badge":"MODERATE_INTERRUPT","confidenceLabel":"VERIFIED_PARTIAL","rubricVersion":"rubric@2026.4","isCurrent":false,"createdAt":"2026-08-10T00:23:54.605Z"},{"score":45,"badge":"HIGH_INTERRUPT","confidenceLabel":"VERIFIED_PARTIAL","rubricVersion":"rubric@2026.4","isCurrent":false,"createdAt":"2026-08-09T23:48:10.772Z"},{"score":60,"badge":"MODERATE_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.4","isCurrent":false,"createdAt":"2026-08-09T23:48:09.840Z"},{"score":60,"badge":"MODERATE_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.4","isCurrent":false,"createdAt":"2026-08-09T23:48:08.439Z"},{"score":60,"badge":"MODERATE_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.4","isCurrent":false,"createdAt":"2026-08-09T17:13:21.390Z"},{"score":66,"badge":"MODERATE_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.3","isCurrent":false,"createdAt":"2026-08-09T05:25:09.604Z"},{"score":66,"badge":"MODERATE_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.3","isCurrent":false,"createdAt":"2026-08-09T05:25:08.449Z"},{"score":66,"badge":"MODERATE_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.3","isCurrent":false,"createdAt":"2026-08-09T05:17:07.635Z"},{"score":66,"badge":"MODERATE_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.3","isCurrent":false,"createdAt":"2026-08-09T05:17:06.460Z"},{"score":66,"badge":"MODERATE_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.3","isCurrent":false,"createdAt":"2026-08-09T05:14:20.954Z"},{"score":88,"badge":"LOW_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.3","isCurrent":false,"createdAt":"2026-08-09T05:14:19.785Z"},{"score":88,"badge":"LOW_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.3","isCurrent":false,"createdAt":"2026-08-09T03:14:06.026Z"},{"score":88,"badge":"LOW_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.2","isCurrent":false,"createdAt":"2026-08-09T01:48:23.153Z"},{"score":88,"badge":"LOW_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.2","isCurrent":false,"createdAt":"2026-08-09T01:45:29.601Z"},{"score":100,"badge":"LOW_INTERRUPT","confidenceLabel":"PROVISIONAL","rubricVersion":"rubric@2026.1","isCurrent":false,"createdAt":"2026-07-10T07:16:38.472Z"}],"findings":[{"interruptType":"no_machine_interface","tier":1,"timing":"setup","hardness":"hard","flowLocation":"operate","description":"Neither an MCP server nor a usable API machine interface was found after Tier 0 and Tier 1 candidate checks.","provenance":null,"rawSignal":{"mcpFound":false,"openApiFound":false,"apiKeySelfServe":"not_checked","documentationUrls":[],"unauthedApiUsable":false,"apiCandidatesTried":["https://api.polygon.io/","https://docs.polygon.io/","https://developer.polygon.io/","https://polygon.io/api"],"documentationFound":false,"unauthedApiReachable":true},"detectedAt":"2026-08-09T23:48:09.835Z"},{"interruptType":"redirect_to_vendor_site","tier":1,"timing":"setup","hardness":"soft","flowLocation":"signup","description":"Signup mandatorily redirects off-domain to https://massive.com/dashboard/signup?redirect=%2Fdashboard%2Fkeys.","provenance":null,"rawSignal":{"signupUrl":"https://polygon.io/dashboard/signup?redirect=%2Fdashboard%2Fkeys","externalRedirect":{"to":"https://massive.com/dashboard/signup?redirect=%2Fdashboard%2Fkeys","isSsoProvider":false}},"detectedAt":"2026-08-09T23:48:09.826Z"}]}