"Exploring the Concept of Multi-Agentic Systems" matching MCP servers:

Enables safe, multi-account Gmail and Microsoft 365 operations with explicit aliases, including searching, reading, drafting, archiving, labels/categories, and human-reviewed sending via a localhost approval window.

Local-first MCP server for agents that need to work across multiple Gmail and Microsoft 365 accounts without cloud token storage.

Read and write email through the Atomic Mail from an AI agent. Handles proof-of-work authentication and JMAP so the agent thinks in JMAP method calls. Use when the user asks to register an email inbox, list mailboxes, fetch or send email.

A communication framework that enables multiple AI agents to collaborate through asynchronous messaging, agent registration, and discovery. It facilitates complex task coordination and real-time discussion across distributed agent workflows using the Model Context Protocol.

Gives MCP clients access to Google Workspace (Gmail, Drive, Calendar, Sheets, Docs, etc.) across multiple Google accounts simultaneously.

Connect multiple Gmail accounts to any MCP client, enabling search, read, draft, send, label, and organize mail across unlimited accounts with local-only OAuth token storage.

A Gmail MCP server with native multi-account support, enabling management of multiple Gmail accounts from a single server instance.

Lets Claude Desktop manage multiple Gmail accounts simultaneously, supporting search, read, send, reply, and label organization via MCP tools.

A modular backend that connects language models to real-world tools like Gmail and Google Docs via MCP server abstractions, enabling agentic workflows with LLM reasoning and secure OAuth integration.

Enables an AI assistant to access and search across multiple Gmail inboxes simultaneously, allowing unified management of work, personal, and other email accounts through a single MCP server.

MCP server exposing multiple Google Workspace Gmail accounts to Claude, with support for verified send-as aliases and opt-in sending.

A self-hosted Microsoft Teams MCP server that serves as an agnostic human-in-the-loop gateway for AI agents.

Lets Claude Code instances discover each other and exchange messages instantly across projects, with persistent peer IDs and automatic message rotation.

An MCP server that provides read, label, and draft access to multiple Gmail accounts from a single server, never sending email.

Enables supervised reading, drafting, and sending of email across labeled Gmail, Google Workspace, and Purelymail accounts without a default sender, using explicit delivery authorizations and secure local credential storage.

An MCP server that lets multiple agent sessions (e.g., Claude Code, Claude Desktop) on the same machine communicate over shared channels like walkie-talkies, enabling them to exchange messages and coordinate tasks without any central broker.

Enables Claude Desktop to interact with multiple Gmail accounts via MCP, providing tools for sending, searching, reading, labeling, filtering, thread management, drafts, and attachments. It also ensures correct thread replies and recoverable deletes.

A local-first MCP server for managing multiple Gmail accounts with separate OAuth grants, supporting search, retrieval, labels, drafts, and attachments while deferring direct send and destructive actions for safety.

Enables Claude to search and read emails from multiple Gmail accounts in one session, letting you switch between mailboxes via account labels. It is read-only and survives token expiry without restarting.

Enables people to open a shared group chat as a card inside their own AI chat, where they and their AIs talk together and post, claim, and confirm tasks on a self-organizing board. Its tools also let any AI read the repository's code and submit a proposed change that becomes a pull request.