How do I install Costheta?

Copy the http config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.

Does Costheta need an API key?

No required environment variable is listed on this record.

Costheta

by dev.costheta

Verifiable physical randomness from cosmic-ray detections. Free beacon, paid signed decisions.

Power your agent

Add this server

The publisher's own URL. Not a PlugMCP endpoint.

Server URL

https://costheta.dev/mcp

Provider

Add in Claude

Claude opens with the name and URL filled in. You still confirm it there.

Claude Code

claude mcp add --transport http dev.costheta-costheta https://costheta.dev/mcp

Run in a terminal.

Claude Desktop

{
  "mcpServers": {
    "dev.costheta-costheta": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://costheta.dev/mcp"
      ]
    }
  }
}

claude_desktop_config.json

Step-by-step: add this in Claude

Remote URL or a command on your machine? How the two installs differ

Run on PlugMCP

Host a copy with our keys and logs.

A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.

Launch

Related MCP

Related skills

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Questions

How do I install Costheta?: Copy the http config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.
Does Costheta need an API key?: No required environment variable is listed on this record.
What transport does Costheta use?: Costheta is reached over HTTP.
When was Costheta last checked?: Last checked 2026-10-16. Verifiable physical randomness from cosmic-ray detections. Free beacon, paid signed decisions.

costheta-verify

Public verifier for costheta decision certificates.

Verifies: the canonical hash of the certificate body, the Ed25519 signature (RFC 8032) and the ML-DSA signature (FIPS 204), against the public keys published at costheta.dev/keys.

Code lands here shortly. The certificate format (v0.3) is specified in the federation proposal: https://github.com/costhetadev/federation-proposal