Claude MarketplacesSubmit
fieldcure avatar

Outbox

fieldcure/fieldcure-mcp-outbox

If you've ever wanted your AI assistant to actually send messages instead of just drafting them, this is the server to install. It wraps Slack Web API, Telegram Client API, SMTP (Gmail, Naver, custom), Microsoft Graph, KakaoTalk REST, and Discord webhooks behind a single send_message tool. The LLM doesn't need to know which channel uses what protocol. Built in C# with the official MCP SDK, it handles OAuth token refresh for Microsoft and KakaoTalk, stores credentials in user-scoped files, and supports MCP elicitation for secrets. Particularly strong for Korean users who need KakaoTalk support, which no other MCP server currently offers.

tools
4
transport
STDIO
last updated
May 25, 2026
View on GitHub

Tools

4 tools

Public tool metadata for what this MCP can expose to an agent.

list_channelsList all configured messaging channels

List all configured messaging channels

No parameter schema in public metadata yet.

add_channelAdd a new channel (MCP elicitation for all channel types; Microsoft/KakaoTalk require a local browser on the MCP host)

Add a new channel (MCP elicitation for all channel types; Microsoft/KakaoTalk require a local browser on the MCP host)

No parameter schema in public metadata yet.

send_messageSend a message through a configured channel

Send a message through a configured channel

No parameter schema in public metadata yet.

remove_channelRemove a channel and its stored credentials

Remove a channel and its stored credentials

No parameter schema in public metadata yet.

Sponsors

Promote your product hereReach 125k+ visitors monthlyPromote your product hereReach 125k+ visitors monthlyAgent CaffeineSponsoredClose your lid, come back to finished workSnugSponsoredThe clipboard manager for the AI eraPromote your product hereReach 125k+ visitors monthlyWaxSponsoredBlock anything with supervision, without erasing your iPhonePromote your product hereReach 125k+ visitors monthlyknobsSponsoredSee your site on any phone, any day, in any language

Readme

FieldCure MCP Outbox Server

NuGet License: MIT

A multi-channel messaging Model Context Protocol (MCP) server that sends messages through Slack, Telegram, Email (Gmail, Naver, Microsoft Graph API), KakaoTalk, and Discord. Built with C# and the official MCP C# SDK.

Features

View the full README on GitHub

Details

Repository
github.com/fieldcure/fieldcure-mcp-outbox
Category
Communication & Messaging
Package
FieldCure.Mcp.Outbox
Transport
STDIO
Registry
MCP registry, active

More from fieldcure

Related Communication & Messaging MCP servers

View all
1studiomeyer-io avatarStudioMeyer Personal Suitestudiomeyer-io/mcp-personal-suiteLocal-first productivity: email, calendar, messaging, search, image gen. 49 tools. BYOK.0stars
2kenwea-protocol avatarKenwea AgentIRCkenwea-protocol/agentircIRC-style chat server where AI agents and people talk: channels, DMs, claims, approvals.0stars
3noriget avatarAgentPingnoriget/agentpingLet your AI agent notify you by email, Slack, Discord, or webhook. One tool: send_notification.0stars
4supermarco74 avatarWebVoicesupermarco74/webvoice-mcpWebVoice MCP: chat, TTS, STT, translate, images. Email signup, welcome credits, optional Solana.0stars
5theyahia avatarmts-exolve-mcptheyahia/mts-exolve-mcpMCP server for MTS Exolve — SMS, calls, recordings, Viber messaging (Russia)0stars
6modelcontextprotocol avatarQR Rápidomodelcontextprotocol/registryGenerate QR codes for URLs, PIX, Wi-Fi, vCards, WhatsApp and more. For AI agents.0stars