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.
Open-source x402 micropayments stack for MCP. Pay-per-tool-call USDC settlement on Solana via the first open-source self-hostable facilitator (no x402.org dependency). Includes TypeScript SDK, CLI, paywall middleware, hosted devnet endpoint, and a live Claude Opus demo. npm install @agenticpay/sdk
LLM-agent-native backtest framework for SHFE daily futures research. 23 MCP tools (strategy validation, scaffolding, indicator catalog, error-code lookup), 22 in-package skills, 32 catalogued error codes, working strategy templates. pip install echolon then claude mcp add -s user echolon -- echolon-mcp.