The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.
Mailcheer
Email API + newsletters. 17 MCP tools. OAuth 2.1 PKCE or API key. EU-hosted (Hetzner + SES).
Install
$
claude mcp add --transport http mailcheer https://mailcheer.com/api/mcpInstall command taken from the project's README or registry entry. Always review code before running it.
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