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.
TCG collectibles + AI agent intelligence. 35+ tools: Vision AI card grading (PSA/Beckett prediction), Monte Carlo price simulation (Heston/Merton/Kou), AI music generation, local image generation (FLUX), TTS, RAG memory, SAST security auditing, and x402 Oracle API. 370K+ indexed products across 25 games. Install via pip install undesirables-mcp-server.