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"roster_observed_date": "2026-09-18", "listed_url": "https://kugelaudio.com/en", "final_url": "https://www.kugelaudio.com/en", "registration_status": "not_observed", "capture_status": "complete", "observed_at": "2026-09-20T21:09:46.032Z", "tool_names": [], "preflight_reason": null, "http_status": 200, "observation_window": { "started_at": "2026-09-20T21:09:45.927Z", "finished_at": "2026-09-20T21:09:49.476Z", "wait_ms": 1500 }, "document_model_context": "undefined", "tool_frame_origins": [], "error_class": null, "record_sha256": "7b954a1c37d932aff29933311e2ed43f4df10f528b8b9b69a9a06c436d5cb1a6" }, { "id": "yc:30639", "name": "Signals", "program": "Y Combinator", "cohort": "Winter 2026", "official_profile_url": "https://www.ycombinator.com/companies/signals", "roster_observed_date": "2026-09-18", "listed_url": "https://www.returnsignals.com", "final_url": "https://www.returnsignals.com/", "registration_status": "not_observed", "capture_status": "complete", "observed_at": 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Neither counts them as not observed.", "Surface categories describe captured metadata, not executed behavior. Shopify provider attribution is inferred from matching commerce tool metadata.", "No tool calls, clicks, forms, authentication, carts, checkouts, or private data were used." ] }, "experimental": { "status": "complete", "complete": true, "flags": [ "--enable-features=WebMCP,WebMCPTesting" ], "browser": "153.0.8010.50", "observation_window": { "started_at": "2026-09-20T21:27:50.533Z", "finished_at": "2026-09-20T21:50:53.251Z", "duration_ms": 1382718 }, "preflight": { "rows": 1663, "unknown_rows": 89, "assessable_windows": 1661, "registration_status_counts": { "access_limited": 1, "not_observed": 1638, "observed": 23, "unknown": 90 } }, "registration": { "observed_rows": 23, "rate_among_assessable": 1.3847, "rate_among_roster": 1.3128, "positive_rows": [ { "id": "yc:30043", "name": "Vespper", "program": "Y Combinator", "cohort": "Fall 2024", "listed_url": "https://vespper.com/?utm_source=ycombinator.com", "final_url": "https://www.vespper.com/", "observed_at": "2026-09-20T21:28:54.030Z", 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null, "platform_attribution": "metadata_described", "classification": { "class": "agent_email_infrastructure_quickstart", "alignment": "aligned", "basis": "Overview and quickstart tools match the homepage description of managed email infrastructure for agents.", "claim_limit": "Classification describes the registered metadata surface only; it does not establish invocation, output, task success or adoption." }, "identity_status": "aligned_with_frozen_roster_and_homepage", "record": "full-native-webmcp/experimental/1b4bfb63a0d1c401e4fc.json", "record_sha256": "0f86691e7c79b5f3a1c82a78363f6680c54bc43e1f163e60e6d95e7ab3469c4d" }, { "id": "yc:30605", "name": "Dedalus Labs", "program": "Y Combinator", "cohort": "Summer 2025", "listed_url": "https://www.dedaluslabs.ai/", "final_url": "https://www.dedaluslabs.ai/", "observed_at": "2026-09-20T21:38:46.969Z", "tool_count": 2, "tool_names": [ "inspect_image_c2pa", "scan_images_c2pa" ], "tool_category": "image_provenance_c2pa_scanning", "platform_surface": null, "platform_attribution": "metadata_described", "classification": { "class": "image_provenance_c2pa_scanning", "alignment": "adjacent", "basis": "The registered names inspect and scan images for C2PA, while the homepage title describes persistent Linux computers for agents; this is a product-adjacent surface.", "claim_limit": "Classification describes the registered metadata surface only; it does not establish invocation, output, task success or adoption." }, "identity_status": "aligned_with_frozen_roster_and_homepage", "record": "full-native-webmcp/experimental/37438da286d1a6315497.json", "record_sha256": "c182bd38e9bc4260de1c6c6f8ec551404a5cc3a3d961d96daf32c68aeceb5dc6" }, { "id": "yc:32227", "name": "Context.dev", "program": "Y Combinator", "cohort": "Summer 2026", "listed_url": "https://context.dev", "final_url": "https://www.context.dev/", "observed_at": "2026-09-20T21:41:12.714Z", "tool_count": 1, "tool_names": [ "scrape-website-demo" ], "tool_category": "web_scraping_demo", "platform_surface": null, "platform_attribution": "metadata_described", "classification": { "class": "web_scraping_demo", "alignment": "aligned", "basis": "The scrape-website-demo name matches the homepage description of a web-scraping API for agents.", "claim_limit": "Classification describes the registered metadata surface only; it does not establish invocation, output, task success or adoption." }, "identity_status": "aligned_with_frozen_roster_and_homepage", "record": "full-native-webmcp/experimental/3da3fb40e13950e8abe8.json", "record_sha256": "462969296d2737d88eba0e4b13d1e35808dba4477b57933405f6a3e699a45be2" }, { "id": "yc:30087", "name": "Gecko Security", "program": "Y Combinator", "cohort": "Fall 2024", "listed_url": "https://gecko.security", "final_url": "https://gecko.security/", "observed_at": "2026-09-20T21:28:15.610Z", "tool_count": 1, "tool_names": [ "start-free-security-scan" ], "tool_category": "security_scan_entry_point", "platform_surface": null, "platform_attribution": "metadata_described", "classification": { "class": "security_scan_entry_point", "alignment": "aligned", "basis": "The start-free-security-scan name matches the homepage description of code, logic and infrastructure security analysis.", "claim_limit": "Classification describes the registered metadata surface only; it does not establish invocation, output, task success or adoption." }, "identity_status": "aligned_with_frozen_roster_and_homepage", "record": "full-native-webmcp/experimental/4077f01eaecd5859071e.json", "record_sha256": "b61c839ce3669ff2b556b89d295748e53982a593dcda8727e62aa5ea68bf660a" }, { "id": "yc:31123", "name": "21st", "program": "Y Combinator", "cohort": "Winter 2026", "listed_url": "https://21st.dev", "final_url": "https://21st.dev/", "observed_at": "2026-09-20T21:45:45.206Z", "tool_count": 3, "tool_names": [ "get_21st_agent_setup", "read_21st_page_markdown", "search_21st_components" ], "tool_category": "component_library_and_agent_setup", 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"tool_names": [ "get_pricing", "get_solution", "list_solutions", "search_blog" ], "tool_category": "security_product_information", "platform_surface": null, "platform_attribution": "metadata_described", "classification": { "class": "security_product_information", "alignment": "adjacent", "basis": "Pricing, solutions, product and blog tools match the security-agent product site, but their names do not show a live pen-test operation.", "claim_limit": "Classification describes the registered metadata surface only; it does not establish invocation, output, task success or adoption." }, "identity_status": "aligned_with_frozen_roster_and_homepage", "record": "full-native-webmcp/experimental/73defe115608de5d00db.json", "record_sha256": "b133ca6ea48c41c8ed4caa2d0b950d29a30e6dc4c05cd2f7fa99dedb67d25c4c" }, { "id": "yc:31366", "name": "Nine Fives", "program": "Y Combinator", "cohort": "Spring 2026", "listed_url": "https://ninefives.com/", "final_url": "https://ninefives.com/", "observed_at": "2026-09-20T21:34:09.628Z", "tool_count": 10, "tool_names": [ "browse_store", "cancel_cart", "get_cart", "get_product", "manage_orders", "proceed_to_checkout", "search_catalog", "search_shop_policies_and_faqs", "show_variant", "update_cart" ], "tool_category": "platform_commerce", "platform_surface": "Shopify commerce tools", "platform_attribution": "inferred_from_matching_commerce_metadata", "classification": null, "identity_status": "aligned", "record": "full-native-webmcp/experimental/7544c968d525552f9cd8.json", "record_sha256": "8dc3dbbb7666ba237e96d1e68367edff37d850e9a0f8e182a53bc2a31677d66b" }, { "id": "speedrun:10d7704d-ca38-42b8-b227-64be0d802203", "name": "Ambiguous AI", "program": "a16z Speedrun", "cohort": "SR005", "listed_url": "https://www.ambiguous.ai", "final_url": "https://www.ambiguous.ai/", "observed_at": "2026-09-20T21:48:24.040Z", "tool_count": 1, "tool_names": [ "search_applications" ], "tool_category": "app_directory_discovery", "platform_surface": null, 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"open_kugelaudio_docs", "open_kugelaudio_pricing" ], "preflight_reason": null, "http_status": 200, "observation_window": { "started_at": "2026-09-20T21:33:50.193Z", "finished_at": "2026-09-20T21:33:52.938Z", "wait_ms": 1500 }, "document_model_context": "object", "tool_frame_origins": [ "https://www.kugelaudio.com" ], "error_class": null, "record_sha256": "e47d87e6a43fa689d041f12b18a13853f99668940ed696901a46fefae6581bab" }, { "id": "yc:30639", "name": "Signals", "program": "Y Combinator", "cohort": "Winter 2026", "official_profile_url": "https://www.ycombinator.com/companies/signals", "roster_observed_date": "2026-09-18", "listed_url": "https://www.returnsignals.com", "final_url": "https://www.returnsignals.com/", "registration_status": "not_observed", "capture_status": "complete", "observed_at": "2026-09-20T21:47:44.817Z", "tool_names": [], "preflight_reason": null, "http_status": 200, "observation_window": { "started_at": "2026-09-20T21:47:44.724Z", "finished_at": "2026-09-20T21:47:47.310Z", "wait_ms": 1500 }, "document_model_context": "object", "tool_frame_origins": [], "error_class": null, "record_sha256": "c2128da02cf385be8384348e6d64108b9d52fe1e7d2425fccea17ac69a676385" }, { "id": "yc:31145", "name": "RamAIn", "program": "Y Combinator", "cohort": "Winter 2026", "official_profile_url": "https://www.ycombinator.com/companies/ramain", "roster_observed_date": "2026-09-18", "listed_url": "https://ramain.ai", "final_url": "https://ramain.ai/", "registration_status": "not_observed", "capture_status": "complete", "observed_at": "2026-09-20T21:47:28.889Z", "tool_names": [], "preflight_reason": null, "http_status": 200, "observation_window": { "started_at": "2026-09-20T21:47:28.779Z", "finished_at": "2026-09-20T21:47:31.383Z", "wait_ms": 1500 }, "document_model_context": "object", "tool_frame_origins": [], "error_class": null, "record_sha256": "d15f22d138424714bb044073f77e32dc9abdcbae4aa85579e997fc50bdf285a1" } ], "limits": [ "A row is a company-program-cohort row in a frozen current-directory snapshot, not a unique company or user.", "Observed means the passive browser saw registration metadata during a bounded homepage visit; it does not mean invocation, successful execution, adoption, or a completed task.", "Unknown and access-limited rows remain visible in the roster denominator; the assessable-window denominator excludes them. Neither counts them as not observed.", "Surface categories describe captured metadata, not executed behavior. Shopify provider attribution is inferred from matching commerce tool metadata.", "No tool calls, clicks, forms, authentication, carts, checkouts, or private data were used." ] }, "identity_review": { "path": "readiness-evidence/native-registration-identity-review.json", "sha256": "4492efd3d54a1497a00dfb5980a825c066d966421cd4ea18d80b9bccfea7682d", "reviewed_positive_rows": 4 }, "sources": { "summary": { "path": "readiness-evidence/native-census-summary.json", "sha256": "f44bedfff73133809be18f7f3feb902199fec2b1c25f2d63b510d4cab239b3a9" }, "subjects": { "path": "readiness-evidence/subjects.json", "sha256": "4f6e76c3589699084f19fadc1e6deb07885e7e25c7094fb64545590d5712261e" }, "default_receipt": { "path": "readiness-evidence/full-native-webmcp/default/receipt.json", "sha256": "72d647da4fb30955f74b423e54646e958d32939b91b133d13857aa7851e81b50" }, "experimental_receipt": { "path": "readiness-evidence/full-native-webmcp/experimental/receipt.json", "sha256": "a40dd0005c3053615b7fcd34fd6cccc47c92c250593b38a57b1f724431268949" } }, "no_private_paths": true, "no_tool_execution": true, "no_adoption_measurement": true, "comparison": { "status": "complete", "observed_in_both": 4, "experimental_only_ids": [ "speedrun:10d7704d-ca38-42b8-b227-64be0d802203", "speedrun:70f8efdb-0078-4960-9e74-9cf4393d610b", "speedrun:7f9e40cb-40e2-4726-94fc-0cf75f0d2349", "yc:30043", "yc:30087", "yc:30283", "yc:30338", "yc:30527", "yc:30605", "yc:31080", "yc:31123", "yc:31222", "yc:31329", "yc:31382", "yc:31418", "yc:31470", "yc:31540", "yc:32169", "yc:32227" ], "default_only_ids": [], "observed_delta": 19, "default_observed_rate_among_assessable": 0.2408, "experimental_observed_rate_among_assessable": 1.3847, "interpretation": "Flag-enabled versus default registration observations only; this is not an execution or adoption comparison." } }