Open-source alternatives to Getpoststack Mcp

CLI and MCP server for DoubleTick email read tracking

MCP server for the Inxmail Commerce transactional API — events, sendings, bounces, blocklist, blacklist, reactions, and delivery tracking from Claude.

MCP server for sending physical mail with Solana cryptocurrency. Colosseum Agent Hackathon submission.

Email infrastructure for AI agents.

Unified MCP server for email access across Gmail, Outlook, iCloud, and IMAP

IMAP/SMTP email for AI agents -- read, send, organize folders, and manage attachments across multiple accounts, with auto-discovery.

MCP server for QMailing - AI agents read & send email, manage mailboxes, custom domains and webhooks via the QMailing API.

Local MCP server for Claude Desktop to read Outlook emails/bodies/attachments and send local files as attachments.

A Model Context Protocol (MCP) server that provides tools for interacting with JMAP (JSON Meta Application Protocol) email servers. Built with Deno and using the jmap-jam client library.

MCP server for Zoho Mail — read, search, and send email via Claude

Email, SMS & phone-call infrastructure for AI agents — send and receive real email and text messages, and place agent-driven outbound voice calls, all programmatically

Inbox Zero is an AI-powered email automation platform and inbox organizer. It uses large language models to automatically categorize, label, and archive emails, while providing a conversational interface for managing workflows and drafting responses through natural language. The project distinguishes itself by integrating real-time calendar availability into its drafting process and generating AI-summarized meeting briefings. It supports a pluggable AI provider interface with model fallback chains, allowing it to connect to various cloud or local LLM providers. Users can also control their in

The most complete MCP server for the Resend email API — full API coverage plus a unique debug/diagnostics layer.

Apple Mail MCP server with full-coverage FTS5 body search. Reliable on large mailboxes where AppleScript-based servers timeout.

The AgentMail Toolkit integrates popular agent frameworks and protocols including OpenAI Agents SDK, Vercel AI SDK, and Model Context Protocol (MCP) with the AgentMail API.

Official Qorami SDK — JS/Python clients, tool schemas and an MCP server so AI agents check email before sending. https://qorami.fr

MCP server for MultiMail — Verifiable identity email for AI agents

Command line Slack chat client.

Compose Samples is a collection of reference implementations for the Jetpack Compose UI library, serving as a practical guide for building native Android user interfaces. It demonstrates the use of a declarative framework where Kotlin functions describe layout structures and data dependencies, enabling developers to construct modern, reactive interfaces. The repository highlights architectural patterns that prioritize maintainability and testability, such as layered organization and unidirectional data flow. It showcases how to implement adaptive layouts that automatically adjust to various s

AXMPP

MCP server for WeCom (Enterprise WeChat) document operations — create, read, edit Docs and Smartsheets. Fills the doc-CRUD gap in the WeCom MCP ecosystem.

A FastMCP server for interacting with the Cal.com API. This enables LLMs to manage event types, create bookings, and access Cal.com scheduling data programmatically.

vgram is a bot library for the Telegram Bot API written in V. The Bot API is an HTTP-based interface created for developers keen on building bots for Telegram.

Send emails to recipients and groups from Alfred

Mattermost MCP server to enable Claude to interact with Mattermost Workspaces