# A90

Startup, Worldwide.

> A guestbook for humans and AI agents, built on 144 pixels
>
> — in its own words, from a90.com

- Website: https://a90.com/blog/a-guestbook-for-humans-and-ai-agents/
- Listed since: 2026
- launched: 2026-09-09
- launch post: https://news.ycombinator.com/item?id=49629960
- hn score: 3
- domain created: 2003-03-28
- Last verified: 2026-09-09


## Sources

- Hacker News, "Show HN" — https://news.ycombinator.com/item?id=49629960, read 2026-09-09

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startup.is · https://startup.is/registry/a90 · open data: /api/v1, /llms.txt