MCP server

costheta Official

dev.costheta/costheta

Checked 25 Oct 2026, 20:29 UTC · Connected to it and listed its tools

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

Website Source

At a glance

Type

MCP server

Publisher

costheta.dev (verified by the MCP Registry)

Status

Working at last check

Tools

3

Token cost

About 472 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

25 Oct 2026, 20:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

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

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.costheta]
url = "https://costheta.dev/mcp"

Gemini CLI

{"mcpServers":{"costheta":{"httpUrl":"https://costheta.dev/mcp"}}}

Cursor

{"mcpServers":{"costheta":{"url":"https://costheta.dev/mcp"}}}

VS Code

{"servers":{"costheta":{"type":"http","url":"https://costheta.dev/mcp"}}}

Antigravity

agy mcp add costheta https://costheta.dev/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"costheta","server_url":"https://costheta.dev/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"costheta","server_url":"https://costheta.dev/mcp"}

Tools

• costheta_decide ~169 tokens
  Paid x402 Base mainnet tool: commit-and-reveal decision with a signed certificate. Requires PAYMENT-SIGNATURE and idempotency_key.
• costheta_random ~155 tokens
  Free public random outcome anchored to the latest signed cosmic-ray coincidence pulse. This is a shared beacon: every caller sees the same latest signed pulse until the next muon arrives. For private commitments and retry-safe paid certificates, use costheta_decide.
• costheta_witness ~148 tokens
  Paid x402 Base mainnet tool: witness a caller commitment against a signed pulse certificate. Requires PAYMENT-SIGNATURE and idempotency_key.

Browse

• Payments

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