# 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: <https://www.ycombinator.com/companies/nine-fives>
- Listed website: <https://ninefives.com/>
- Browser: 153.0.8010.50

## Default Chrome

Registration observed. Final URL: <https://ninefives.com/>

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: <https://ninefives.com/>

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/)