# Nine Fives — WebMCP observations Canonical: https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-31366/ - Roster: Y Combinator / Spring 2026 - Roster observed: 2026-09-18 - Official profile: - Listed website: - Browser: 153.0.8010.50 ## Default Chrome Registration observed. Final URL: Window: 2026-09-20T21:10:05.305Z to 2026-09-20T21:10:08.143Z. Tools: browse\_store, cancel\_cart, get\_cart, get\_product, manage\_orders, proceed\_to\_checkout, search\_catalog, search\_shop\_policies\_and\_faqs, show\_variant, update\_cart. Source SHA-256: 6b4a5b4959917b7d1e33780bbd605572060299075b2764a23efe0d134743e856 ## Experimental features enabled Registration observed. Final URL: Window: 2026-09-20T21:34:09.462Z to 2026-09-20T21:34:12.521Z. Tools: browse\_store, cancel\_cart, get\_cart, get\_product, manage\_orders, proceed\_to\_checkout, search\_catalog, search\_shop\_policies\_and\_faqs, show\_variant, update\_cart. Source SHA-256: 8dc3dbbb7666ba237e96d1e68367edff37d850e9a0f8e182a53bc2a31677d66b ## Limits No tool was invoked. Registration does not establish execution, product quality, task success or adoption. Absence in one window is not website-wide absence. [Study and methods](https://mudpie.ai/agent-readiness/measure-agent-distribution-without-counting-registrations/) · [Full dataset](https://mudpie.ai/research/native-webmcp-census-2026-09-20.json) · [Census directory](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/) [Nine Fives — WebMCP observations]() Source observed: 2026-09-21T00:52:20.896Z. Last checked: 2026-09-21T00:52:20.896+00:00. [Full page Markdown]() --- Have a question this summary doesn’t answer? Ask the exact question you have. It returns a fresh, cited answer from mudpie.ai’s knowledge base. No account or API key required. Replace {question} with your own question, URL-encoded. ```text GET https://mudpie.mudpie.ai/agent/faq?q={question}&trace=t_9191186abe3c ```