oddsrelay-mcp

An MCP server that gives an AI assistant read access to OddsRelay: matched boards, the prices for one event, and the sport, event, bookmaker and coverage lists behind them. It is read-only, and every call that spends tokens is priced first and refused above a per-call cap (max_tokens). The assistant is told to ask you before raising it.

It works with Claude Desktop, Claude Code, Cursor and any other client that starts MCP servers over stdio, and it is built on the oddsrelay TypeScript client.

API docs: https://oddsrelay.io/docs

Get a key

Sign up at app.oddsrelay.io/signup and copy your key from the dashboard. Free gives you 50,000 tokens for 14 days from sign-up, with no card, then no tokens until you choose a plan, on the same key. Plans and token prices. Paid plans are for personal use. Any business, even one using the data only in-house, and any product that serves other people runs on Enterprise; a business can try the data on Free first.

Set up

You need an OddsRelay API key (Get a key, above). The server reads the key from ODDSRELAY_KEY. The bundle and the Gemini CLI extension set it for you; the other routes set it in your MCP client’s config and need Node 18 or later.

Claude Desktop (one-click bundle)

Download oddsrelay-mcp.mcpb from the latest release and double-click it to install it in Claude Desktop, which asks for one setting: your API key. The setting is marked sensitive, so Claude Desktop masks it, and it passes the key to the server as ODDSRELAY_KEY. The bundle carries everything the server needs and runs on the Node built into Claude Desktop, so you need no Node of your own.

Claude Code

claude mcp add --transport stdio oddsrelay --env ODDSRELAY_KEY=your_key_here -- npx -y oddsrelay-mcp

Claude Desktop (config file)

Settings, Developer, Edit Config opens claude_desktop_config.json. Add the server, then restart Claude Desktop:

{
  "mcpServers": {
    "oddsrelay": {
      "command": "npx",
      "args": ["-y", "oddsrelay-mcp"],
      "env": { "ODDSRELAY_KEY": "your_key_here" }
    }
  }
}

Cursor

Add the same mcpServers block to ~/.cursor/mcp.json (every project) or .cursor/mcp.json (one project).

The key sits in that config file as plain text, so keep the file out of anything you commit.

Gemini CLI

gemini extensions install https://github.com/oddsrelay/oddsrelay-mcp

Gemini CLI installs the extension from the latest release, then asks for your API key, keeps it in your system keychain and passes it to the server as ODDSRELAY_KEY. The extension also loads the Agent Skill below.

First questions

Ask your assistant:

Using OddsRelay, which bookmakers carry tennis on the standard board?

That calls coverage, which costs no tokens. Then: