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mcp/harbor
Verified official

outbox MCP

v2.1.3

io.github.fieldcure/outbox

Multi-channel messaging MCP server for Slack, Telegram, Email, KakaoTalk, and Discord.

transport:stdio runtime:nuget
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Target client

run in your project directory 

claude mcp add outbox -- dnx FieldCure.Mcp.Outbox --yes

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs

This listing does not declare its tools. Connect the server and your client will discover them on the handshake.