Add prediction market data to Claude Desktop in 30 seconds (free MCP server)

One-line MCP config

Add this to ~/Library/Application Support/Claude/claude_desktop_config.json:

{"mcpServers":{"nexus":{"url":"https://nexus-agent-xa12.onrender.com/mcp"}}}

Restart Claude Desktop. Now ask: "What are the Fed rate odds?" or "Get me a BTC signal."

Free endpoints

curl "https://nexus-agent-xa12.onrender.com/v1/signals?symbol=BTC"
curl "https://nexus-agent-xa12.onrender.com/kalshi?market=Fed"

What you get

• Live Kalshi vs Polymarket odds
• BTC/ETH/FED/CPI/GDP signals with confidence scores
• Cross-venue arb spreads (paid, $0.01 USDC via x402 on Base)

No API key. No account. Works now.