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.
Full-stack L402 SDK: server middleware (Express/FastAPI/axum/net/http) + agent client with auto-pay. 4 languages (TypeScript, Python, Go, Rust). MCP server, LangChain integration, budget control. npx l402-kit-mcp
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