A free, OpenAI-compatible API for coding agents and your own projects. One key, every model below, and automatic fallback across free providers when one of them is slow or down.
Horizon speaks the OpenAI API, with streaming, tool calls and reasoning, so coding agents work out of the box. Paste the base URL and your key into Cline, Roo Code, Kilo Code, OpenCode, Continue, Aider, Zed or any tool that accepts an OpenAI-compatible endpoint, and start building.
https://horizon-api.dino.icu/v1sk-... from the Keys pagedeepseek/deepseek-v4.1-flashLive status from the router's health checks. Full status page
Horizon is invite-style: anyone with a Hack Club account can sign up, an admin approves you.
Use your Hack Club account. There are no passwords here.
New accounts start with zero quota. Ping the admin and you will be switched on.
On the Keys page. The key is shown once, so copy it right away.
Point any OpenAI client at Horizon. The docs have copy-paste examples.