FieldCure.Mcp.Outbox 0.2.0

.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher.
There is a newer version of this package available.
See the version list below for details. 
dotnet tool install --global FieldCure.Mcp.Outbox --version 0.2.0
This package contains a .NET tool you can call from the shell/command line. 
dotnet new tool-manifest
                    


                            if you are setting up this repo
                        

                    

                
dotnet tool install --local FieldCure.Mcp.Outbox --version 0.2.0
This package contains a .NET tool you can call from the shell/command line. 
#tool dotnet:?package=FieldCure.Mcp.Outbox&version=0.2.0
                    


                    

                
nuke :add-package FieldCure.Mcp.Outbox --version 0.2.0

FieldCure.Mcp.Outbox

Multi-channel messaging MCP server — send messages through Slack, Telegram, Email (SMTP), and KakaoTalk with a single send_message tool. One install, one interface, multiple channels. Secrets stored securely in Windows Credential Manager, never exposed to the LLM.

Install

dotnet tool install -g FieldCure.Mcp.Outbox

Quick Start

# Add a Slack channel
fieldcure-mcp-outbox add slack

# Add a Gmail channel
fieldcure-mcp-outbox add gmail

# Start MCP server
fieldcure-mcp-outbox

Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "outbox": {
      "command": "fieldcure-mcp-outbox"
    }
  }
}

VS Code (Copilot)

Add to .vscode/mcp.json:

{
  "servers": {
    "outbox": {
      "command": "fieldcure-mcp-outbox"
    }
  }
}

Tools (4)

Tool Description Confirmation
list_channels List all configured messaging channels —
add_channel Add a new channel (opens setup console) —
send_message Send a message through a channel Required
remove_channel Remove a channel and credentials Required

Channels

Channel Protocol Setup
Slack Web API (chat.postMessage) Bot Token
Telegram Client API (WTelegramClient) API ID + Hash + SMS
Gmail SMTP (smtp.gmail.com:587) App password
Outlook SMTP (smtp-mail.outlook.com:587) App password
Microsoft 365 SMTP (smtp.office365.com:587) App password
Naver SMTP (smtp.naver.com:587) App password
Custom SMTP User-defined SMTP server Username + password
KakaoTalk Kakao REST API OAuth 2.0

Security

  • Secrets stored in Windows Credential Manager (DPAPI) — never exposed to LLM
  • Channel setup runs in a separate console process — credentials never pass through MCP stdio
  • send_message and remove_channel require user confirmation in the client

Requirements

Product Compatible and additional computed target framework versions.
.NET net8.0 is compatible.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 was computed.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

This package has no dependencies.

Version Downloads Last Updated
2.1.2 115 4/23/2026
2.1.1 117 4/21/2026
2.1.0 103 4/20/2026
2.0.0 112 4/17/2026
1.1.0 101 4/14/2026
1.0.0 116 4/7/2026
0.4.1 123 4/3/2026
0.4.0 107 3/31/2026
0.3.0 101 3/31/2026
0.2.0 117 3/30/2026
0.1.0 112 3/29/2026

v0.2.0: Fix stdio transport corruption from Console.OutputEncoding; derive ServerInfo.Version from assembly; add CI workflow.