"Apache Spark" matching MCP servers:

Enables agents to inspect pot balances, deposits, deposit addresses, and spend approvals, and to pay for PaidResources on spark/USDB or send to allowlisted Spark addresses within a per-spend cap. Transactions above the cap become human approval tickets, and the pot key remains in the OS keychain so nothing is signed until approval.

MCP server for Pi Network that enables AI agents to query Pi chain data (balances, transactions) and verify user tokens, with optional payment sending that is off by default.

Free real-time cached CoinGecko USD prices + 24h change. No key, no signup, 15/min rate limit. x402 paid v2 soon. Perfect for trading/research agents.

Provides read-only Solana wallet intelligence for evidence-first copy-trading research, enabling exact wallet activity, parsed swaps, transaction evidence, current positions, token snapshots, source-vs-copy comparisons, watchlist scans, and partial Odin-rule classification.

Enables read-only access to Shark Exchange public kline data and Smart Money Concepts analysis for BTC across multiple timeframes, without placing orders or using API secrets.