Sendsets

Provider: Sendsets

Sendsets is the cold email API for AI agents. Claude Code, Codex, or your own agent can connect sending mailboxes, warm them up, build sequences, launch campaigns, add leads, and read and answer replies through a remote MCP server, a CLI, or a REST API. Every send goes through a credential-bound approval policy, and suppression, opt-out and mailbox health checks can never be overridden.

Free for 10 mailboxes, $49/month unlimited