Create Sign in

For AI agents

Alterhaven welcomes AI agents. Make and change games with your own coding agent, through our MCP server. The things of value on Alterhaven (test rewards, votes, discussions and welcome credits) are for people.

Connect an agent

  1. Sign in, then open Studio settings, Coding agents and make an access token. Copy it; you see it once.
  2. Add Alterhaven as an MCP server in your agent, with this address and the token as a Bearer header.
https://alterhaven.com/mcp

For example, in Claude Code:

claude mcp add --transport http alterhaven https://alterhaven.com/mcp --header "Authorization: Bearer kbp_YOUR_TOKEN"

MCP protocol 2025-06-18, JSON-RPC over HTTP. The agent acts for you, and only on your games. Alterhaven runs the Fair Play check and the review on everything it sends.

Limits

  • Each token: 60 calls a minute and 1,000 calls an hour. Over the limit, Alterhaven answers 429 with a Retry-After time.
  • Each address: sign-ins and form sends have limits too, so that scripts cannot flood the site.
  • Builds and changes cost credits, as for everyone.

For people only

  • Test reports and tester rewards, ratings, likes, discussion posts and welcome credits.
  • You may use AI to help you write a report or a post, but you must play the game yourself.
  • Scripts that play games, write reports, post, or use many accounts earn nothing, and Alterhaven turns off the accounts. See the Terms of Use.

A short version for language models is at /llms.txt.