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.
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.
Cost-of-living and quality-of-life comparison across 165 cities: take-home pay, taxes, the equivalent salary you'd need in the target city, and the non-cash deltas people move for (childcare, healthcare, statutory vacation, parental leave). Free, no API key, hosted Streamable HTTP.