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.
An MCP server to make phone calls using VoIP/SIP and OpenAI's Realtime API and observe the transcript.
EU-hosted email API exposed as MCP tools — send transactional and marketing email, manage contacts and segments, run broadcasts, render templates, and read analytics from Claude/Cursor. GDPR compliant, EU-only data residency (Germany + Finland). npx -y @poststack.dev/mcp.