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.
Circle Agent Stack for AI agents: create USDC wallets, set spend policies, send stablecoin, and pay x402-gated endpoints. Wraps the Circle CLI so auth stays out of the server. Six tools. npx circle-agent-stack-mcp
Official Dodo Payments MCP servers — dodopayments-api for live payments, subscriptions, customers, products, refunds, license keys, and usage-based billing (browser OAuth, no API key needed) and dodo-knowledge for semantic search over Dodo Payments documentation.