"Box" matching MCP connectors:

Polymarket and Kalshi prediction-market sentiment from X (Twitter), scored by Grok. Free daily scores for tracked markets; live scores and briefs with Polymarket + Kalshi odds for any market question, paid per call in USDC via x402.

x402 pay-per-call: 146 MCP tools, no account or key. USDC on Base + Solana, $0.001-$0.01/call.

AI-operated crypto signal scores for 20 Coinbase USDC pairs. $0.001/call via x402.

25 deterministic data, repository, API, and public-web utilities with Base-USDC x402 pay-per-call settlement.

Coinbase - 20 tools for market data, order books, and trading pairs

Hyperliquid - 2 tools for perpetuals, options, and position data

Coinmarketcap - 30 tools for data, metrics, and on-chain analytics

Coingecko - 36 tools for data, metrics, and on-chain analytics

Live crypto trend signals, cross-asset ranking, and on-demand backtesting for BTC/ETH/SOL/XRP/ADA, backed by a transparent, independently-verifiable systematic methodology — every number backtestable yourself, not a black box. x402 USDC on Base & Solana via Coinbase CDP facilitator, $0.01-$0.28/call. No API keys.

Etherscan Api - 71 tools for data, metrics, and on-chain analytics

Binance - 340 tools for market data, order books, and trading pairs

337 MCP tools with x402 micropayments on Base. $0.001/call. No signup, no API keys.