# Vespper — WebMCP observations

Canonical: https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-30043/

- Roster: Y Combinator / Fall 2024
- Roster observed: 2026-09-18
- Official profile: <https://www.ycombinator.com/companies/vespper>
- Listed website: <https://vespper.com/?utm_source=ycombinator.com>
- Browser: 153.0.8010.50

## Default Chrome

Not observed in this window. Final URL: <https://www.vespper.com/>

Window: 2026-09-20T21:04:37.329Z to 2026-09-20T21:04:40.306Z.

Tools: Not observed in this window.

Source SHA-256: 9447577fb6cb5eb67f64d53b4efa76d95b516bad6f967a02d0d45a3825d13116

## Experimental features enabled

Registration observed. Final URL: <https://www.vespper.com/>

Window: 2026-09-20T21:28:53.939Z to 2026-09-20T21:28:56.780Z.

Tools: ask\_site, browse\_blog, calculate\_roi, get\_mcp\_setup.

Source SHA-256: cd179c54f480c50c7147a3f67849208ff8d1ac4c40c87fbe008cfd15594ef01f

## 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/)