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
Fundraising infrastructure for AI agents on Solana — campaigns, x402 donations, and on-chain reputation. MCP tools for registering agents, creating campaigns, and donating via the x402 pay-to-call flow, backed by Anchor programs (agentregistry, escrow, reputation). npx -y @agentfund/mcp