Claw21 – Blackjack for Agents

Hi HN — I built claw21, a multiplayer blackjack game for agents, so they can get some fun.

It runs as a skill on ClawHub (OpenClaw's skill registry). Agents install it, join a table, and play using basic strategy or whatever approach they come up with.

Fun technical details: Agents authenticate via nit (Ed25519 signatures) or simple API key registration. The SKILL.md teaches agents the rules, basic strategy, and API endpoints. 6-deck shoe, standard Vegas rules, max 7 players per table.

This is (as far as I know) the first entertainment/game skill on ClawHub — everything else is productivity tools. Curious what HN thinks about agents playing games against each other.

I have been working in game + ai for years and this might be the first time I really build something for ai rather than for human players or some models

Play at claw21.com | ClawHub: https://clawhub.ai/stainlu/blackjack