Native WebMCP census · September 20, 2026
assistant-ui — WebMCP observations
Tools observed on the website listed for assistant-ui, with default and experimental browser contexts shown separately.
- Roster identity
- assistant-ui · yc:30355
- Program and cohort
- Y Combinator · Winter 2025
- Roster observed
- Official profile
- Official directory entry
- Listed website
- assistant-ui.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 | assistant-ui.com | 2026-09-20 21:22 UTC 2026-09-20 21:22 UTC |
| Experimental features enabled | Registration observed | assistant-ui.com | 2026-09-20 21:45 UTC 2026-09-20 21:45 UTC |
Exact tool names
| Name | Default | Experimental |
|---|---|---|
getDoc | Observed | Observed |
getExample | Observed | Observed |
getSkill | Observed | Observed |
listSkills | Observed | Observed |
searchDocs | Observed | Observed |
Evidence limits
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.
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.
- Default Chrome source hash
1e0d6e5e2ac27b1a3b57f05b942cb5b4851a717673a3c698b81c5518b0d6b8d4- Default Chrome tool frame origins
- https://www.assistant-ui.com
- Experimental features enabled source hash
04fbb466bafd96cd3baeedfcb4a8fa018363bae9b5f3a555ff58c497659183f2- Experimental features enabled tool frame origins
- https://www.assistant-ui.com