"Collaboration Between Multiple AIs via MCP (Master Control Program)" matching MCP servers:

Connects several Gmail and Google Workspace accounts to MCP-capable AI apps so they can search, read, draft, send, reply, and label mail across one account or all of them at once. Runs locally on Windows with encrypted on-disk credentials, no delete tools, and approval-gated sending.

Enables AI assistants to manage multiple Outlook/Microsoft 365 mailboxes simultaneously through MCP tools, with local OAuth token storage.

An MCP server that interfaces with the Missive API, enabling Claude to manage email conversations, contacts, and team collaboration.

MCP server for Checkpoint Harmony Email & Collaboration (Avanan). Enables AI assistants to manage email security, anti-phishing, anti-malware, and threat detection via the Avanan API.

MCP server for interacting with Google Gmail and Calendar via natural language, supporting multiple accounts.

Enables AI assistants to securely manage multiple email accounts via IMAP and SMTP, including searching, reading, sending, replying, forwarding, organizing folders, marking, and bulk deleting messages.

Enables AI clients like Cursor to send emails via Resend, supporting multiple recipients, subjects, and HTML bodies, with configuration through environment variables.

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

Unified email access via IMAP/SMTP, enabling reading, searching, sending, and deleting messages across multiple accounts through a single MCP server.

Enables AI assistants to search, read, send, reply, forward, and organize Gmail messages and threads across multiple Google accounts via a self-hosted Cloudflare Worker.

Enables receiving and sending email via IMAP and SMTP across multiple accounts, with tools for listing, searching, reading, replying, and managing messages.

A remote MCP server for Cloudflare Workers that lets ChatGPT, Claude, and other MCP clients read and organize multiple Google and Microsoft cloud accounts without copying data between them.

Enables reading and sending emails via IMAP and SMTP through the MCP protocol. Supports multiple email accounts and configuration via UI or environment variables.

MCP server that lets agents check domain email authentication (SPF, DKIM, DMARC, MX) via a free API, returning grades and shareable report URLs. Also provides tools for listing paid services and partner program terms.

Read and draft Gmail messages without sending, enforcing human review; supports multiple accounts via OAuth.

MCP server for managing email via IMAP/SMTP, supporting multiple accounts and tools for reading, sending, searching, and organizing emails.

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.

Connects Gmail to AI assistants via the MCP protocol, enabling search, read, send, and manage emails across multiple Google accounts simultaneously.

Enables searching, reading, sending, drafting, and organizing emails across multiple Google accounts via MCP.

Connects multiple IMAP and SMTP mailboxes to MCP clients like ChatGPT without exposing credentials, enabling email search and thread retrieval via natural language.