# Accelerator WebMCP observations

Observed September 20, 2026. 1752 roster rows; 23 entries with registrations in at least one mode. No tool execution or adoption was measured.

- [Ambiguous AI](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/speedrun-10d7704d-ca38-42b8-b227-64be0d802203/): a16z Speedrun / SR005; default: Not observed in this window; experimental: Registration observed.
- [Pen.dev](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/speedrun-70f8efdb-0078-4960-9e74-9cf4393d610b/): a16z Speedrun / SR005; default: Not observed in this window; experimental: Registration observed.
- [Lazyweb](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/speedrun-7f9e40cb-40e2-4726-94fc-0cf75f0d2349/): a16z Speedrun / SR007; default: Not observed in this window; experimental: Registration observed.
- [Vespper](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-30043/): Y Combinator / Fall 2024; default: Not observed in this window; experimental: Registration observed.
- [Gecko Security](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-30087/): Y Combinator / Fall 2024; default: Not observed in this window; experimental: Registration observed.
- [Confident AI](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-30283/): Y Combinator / Winter 2025; default: Not observed in this window; experimental: Registration observed.
- [CopyCat AI](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-30338/): Y Combinator / Winter 2025; default: Not observed in this window; experimental: Registration observed.
- [assistant-ui](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-30355/): Y Combinator / Winter 2025; default: Registration observed; experimental: Registration observed.
- [MindFort](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-30527/): Y Combinator / Spring 2025; default: Not observed in this window; experimental: Registration observed.
- [Dedalus Labs](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-30605/): Y Combinator / Summer 2025; default: Not observed in this window; experimental: Registration observed.
- [Button Computer](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-30770/): Y Combinator / Winter 2026; default: Registration observed; experimental: Registration observed.
- [Didit](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-31080/): Y Combinator / Winter 2026; default: Not observed in this window; experimental: Registration observed.
- [21st](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-31123/): Y Combinator / Winter 2026; default: Not observed in this window; experimental: Registration observed.
- [Pocket](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-31214/): Y Combinator / Winter 2026; default: Registration observed; experimental: Registration observed.
- [Superset](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-31222/): Y Combinator / Spring 2026; default: Not observed in this window; experimental: Registration observed.
- [primitive](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-31329/): Y Combinator / Spring 2026; default: Not observed in this window; experimental: Registration observed.
- [Nine Fives](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-31366/): Y Combinator / Spring 2026; default: Registration observed; experimental: Registration observed.
- [Kinro](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-31382/): Y Combinator / Spring 2026; default: Not observed in this window; experimental: Registration observed.
- [Taiga](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-31418/): Y Combinator / Spring 2026; default: Not observed in this window; experimental: Registration observed.
- [Tasklet](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-31470/): Y Combinator / Spring 2026; default: Not observed in this window; experimental: Registration observed.
- [KugelAudio](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-31540/): Y Combinator / Spring 2026; default: Not observed in this window; experimental: Registration observed.
- [Speko](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-32169/): Y Combinator / Summer 2026; default: Not observed in this window; experimental: Registration observed.
- [Context.dev](https://mudpie.ai/directory/webmcp/accelerators-2026-09-20/yc-32227/): Y Combinator / Summer 2026; default: Not observed in this window; experimental: Registration observed.

[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)

I co-founded Lazyweb, one of the SR007 entries; it used the same public procedure.