Native WebMCP census · September 20, 2026
primitive — WebMCP observations
Tools observed on the website listed for primitive, with default and experimental browser contexts shown separately.
- Roster identity
- primitive · yc:31329
- Program and cohort
- Y Combinator · Spring 2026
- Roster observed
- Official profile
- Official directory entry
- Listed website
- primitive.dev
- 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 | Not observed in this window | primitive.dev | 2026-09-20 21:11 UTC 2026-09-20 21:11 UTC |
| Experimental features enabled | Registration observed | primitive.dev | 2026-09-20 21:35 UTC 2026-09-20 21:35 UTC |
Exact tool names
| Name | Default | Experimental |
|---|---|---|
primitive_overview | Not observed | Observed |
primitive_quickstart | Not 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
ed6437436d32f8660cf7dea9bcf438cd57ecb7bd9c4c6cc2d9fb94b8e9970398- Default Chrome tool frame origins
- No registration observed
- Experimental features enabled source hash
0f86691e7c79b5f3a1c82a78363f6680c54bc43e1f163e60e6d95e7ab3469c4d- Experimental features enabled tool frame origins
- https://www.primitive.dev