costheta is a Model Context Protocol (MCP) server: Verifiable physical randomness from cosmic-ray detections. Free beacon, paid signed decisions. Because it speaks the Model Context Protocol, AI assistants can use costheta as a set of callable tools instead of you copy-pasting between apps.
It's a hosted (remote) server — point your client at https://costheta.dev/mcp and you're connected, with nothing to install locally. The current release is v0.1.0, published under the MIT license, with source at costhetadev/costheta-verify on GitHub.
On mcp.site, costheta sits in the Development category. Any MCP client can use it — Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed among them — via the install snippets below. If you maintain costheta for costheta.dev, claim this listing to verify ownership, earn the Verified badge, and keep the details current.
