# Button Computer — WebMCP observations

Canonical: https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-30770/

- Roster: Y Combinator / Winter 2026
- Roster observed: 2026-09-18
- Official profile: <https://www.ycombinator.com/companies/button-computer>
- Listed website: <https://buttoncomputer.com>
- Browser: 153.0.8010.50

## Default Chrome

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

Window: 2026-09-20T21:22:26.433Z to 2026-09-20T21:22:28.905Z.

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: 0f4a192fad2aa765733aeb6b2a743fc40e9f1018dcddaac605a9a041d7e0d168

## Experimental features enabled

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

Window: 2026-09-20T21:46:03.984Z to 2026-09-20T21:46:06.247Z.

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: 39cb8715ddc66f4a8989387aa3a0804b49ca9f02c8b96305d4afd3223c058380

## 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/)