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Ringmaster

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Ringmaster is lifecycle email automation software made by ZNZ Systems. Applications send events through a REST API, while AI agents use its MCP server to design and manage email flows, campaigns and segments. Ringmaster handles recipient-timezone sending windows, deduplication, consent, unsubscribes and suppressions. It works with MCP clients including Claude, ChatGPT, Claude Code and Cursor. The flat plan costs US$300 per month and includes unlimited flows, campaigns and segments and 10,000 emails per month, with more available on request.

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