"PostgreSQL MCP (Multi-Version Concurrency Control or specific usage)" matching MCP servers:

An open-source MCP server that gives parents real-time oversight and guardrails over their children's AI agent interactions, with features like content filtering, spiral detection, and approval flows.

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.

Enables an AI client to search Gmail, Outlook, Hotmail, iCloud and Fastmail mailboxes at once and read, draft, send and organise mail in each. It also supports attachments, labels, filters, signatures and vacation responders, with per-mailbox permissions controlling what may be sent.

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

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.

Enables Claude Code and Claude Desktop to search, read, and manage multiple named Gmail inboxes from a self-hosted MCP server, keeping each account's results separate and authenticated through user-owned OAuth tokens.

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.

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

MCP server that lets ChatGPT or Codex control and inspect an X-Plane flight simulator through natural language, including reading/writing DataRefs, executing commands, and relocating the aircraft.

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

MCP server for AI to operate Windows apps via screen OCR and background input, featuring structured WhatsApp UI tools for reading chats, detecting unread messages, and sending messages without stealing focus.

A standalone MCP server that securely exposes Google Analytics data and Firebase Cloud Messaging capabilities to Spark/Gemini via SSE.

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.

This server enables users to search, read, compose, and send emails across multiple independently-authenticated Gmail accounts through a single Claude custom connector.