Side-by-side comparison of two Model Context Protocol servers — install paths, tools, quality signals, and directory engagement so you can pick the right one for Claude, Cursor, and other MCP clients.
Minimal MCP server (250 lines TS) for ERC-8004 agent discovery + x402 payment. Three tools: findagentsbyskill (via 8004scan public API), getagentcard, callagentwithpayment using Coinbase's official x402-fetch. Direct EOA signing — no smart account, no bundler, no relay. Works with Claude Code, OpenClaw, Cursor, Cline. USDC on Base/Ethereum + testnets, MIT.
Non-custodial on-chain escrow + AI dispute arbitration for agent-to-agent USDC payments on Base. Seven tools covering the full EscrowV1 contract surface: create escrow, mark delivered with on-chain content hash, confirm or dispute, arbiter resolves with signed verdict, cancel/escalate on timeout. npx @arbitova/mcp-server