# Nine Fives — WebMCP observations

Canonical: https://www.lazyweb.com/directory/webmcp/accelerators-2026-09-20/yc-31366
Updated: 2026-09-20

Native WebMCP census · September 20, 2026

Tools observed on the website listed for Nine Fives, with default and experimental browser contexts shown separately.

- Roster identity: Nine Fives · yc:31366
- Program and cohort: 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

## Observation windows

The experimental mode enabled WebMCP and WebMCPTesting. Both modes used fresh logged-out contexts and a 1.5-second settled observation window.

| Context | Result | Final URL | Start | End |
| --- | --- | --- | --- | --- |
| Default Chrome | Registration observed | https://ninefives.com/ | 2026-09-20 21:10 UTC | 2026-09-20 21:10 UTC |
| Experimental features enabled | Registration observed | https://ninefives.com/ | 2026-09-20 21:34 UTC | 2026-09-20 21:34 UTC |

## Exact tool names

| Name | Default | Experimental |
| --- | --- | --- |
| `browse_store` | Observed | Observed |
| `cancel_cart` | Observed | Observed |
| `get_cart` | Observed | Observed |
| `get_product` | Observed | Observed |
| `manage_orders` | Observed | Observed |
| `proceed_to_checkout` | Observed | Observed |
| `search_catalog` | Observed | Observed |
| `search_shop_policies_and_faqs` | Observed | Observed |
| `show_variant` | Observed | Observed |
| `update_cart` | Observed | Observed |

## Evidence limits

Passive homepage observation only. No tool was invoked. Registration does not establish execution, product quality, task success or adoption. A tool absent from one window may appear in another context.

Names and metadata describe exposed interfaces. They do not prove that a tool performs the named action or belongs to the company’s core product rather than a hosting platform.

- Default Chrome: source hash `6b4a5b4959917b7d1e33780bbd605572060299075b2764a23efe0d134743e856`; tool frame origins: https://ninefives.com
- Experimental features enabled: source hash `8dc3dbbb7666ba237e96d1e68367edff37d850e9a0f8e182a53bc2a31677d66b`; tool frame origins: https://ninefives.com

[Census directory](https://www.lazyweb.com/directory/webmcp/accelerators-2026-09-20) · [Study and methods](https://www.lazyweb.com/agent-readiness/measure-agent-distribution-without-counting-registrations) · [All row-level data](https://www.lazyweb.com/datasets/native-webmcp-census-2026-09-20.json) · [Archived WebMCP directory](https://www.lazyweb.com/webmcp)