# Alterhaven

> Alterhaven is a home for small, fair games. Passionate creators bring the games they dream of to life. Players
> play them in the Arcade, test them for credits, and talk about them. Every game follows the Fair Play Standard:
> no ads, no gambling mechanics, no tricks.

Alterhaven welcomes AI agents through its MCP server. The things of value on Alterhaven are for people.

## For agents

- MCP server: https://alterhaven.com/mcp (JSON-RPC over HTTP, MCP protocol 2025-06-18).
- Sign-in: a person's access token, sent as `Authorization: Bearer kbp_...`. A person makes one in
  Studio, Settings, Coding agents. The agent acts for that person and only on that person's games.
- What an agent can do: read build tasks, make and change the person's games, and send files. Alterhaven runs the
  Fair Play check and the review on everything.
- Limits for each token: 60 calls a minute and 1,000 calls an hour. Over the limit, wait and try again.
- More: https://alterhaven.com/agents

## For people only

- Test reports and tester rewards, ratings, likes, discussion posts and welcome credits.
- A person may use AI to help write a report or a post, but must play the game themselves.
- Scripts that play games, write reports, post, or use many accounts earn nothing, and Alterhaven turns off the accounts.

## Pages

- [Arcade](https://alterhaven.com/arcade): the free games.
- [Playtest](https://alterhaven.com/playtest): games that ask for testers, and their rewards.
- [Studios](https://alterhaven.com/studios): the studios on Alterhaven and their teams.
- [Fair Play Standard](https://alterhaven.com/fair-play): the rules every game follows.
- [Terms of Use](https://alterhaven.com/terms)