"Loop" matching MCP servers:

Pauses AI agent execution and routes approval requests to humans via Slack or email, with cryptographically signed proof of the human's decision.

Human-in-the-loop approval inbox for AI agents: an agent proposes an action (send email, post comment, run a command), a human approves, rejects, or edits it from a web, mobile, or Slack/Discord/Telegram inbox, and the agent only runs on approval. Full audit trail, self-hostable (MIT).

A minimal XMPP MCP server enabling human-in-the-loop notifications and messaging with a single allowlisted JID, exposing tools for status, sending messages, chat states, and message polling/waiting.

MCP server that exposes 59 tools for Loom's internal GraphQL API, enabling listing, searching, and managing Loom videos, transcripts, comments, tasks, and more.

Enables AI assistants to securely read, search, draft, and send Outlook emails, manage calendar events, and access mailbox folders through a local MAPI connection to Windows Outlook, with human-in-the-loop safeguards.

Ariel is an MCP server that exposes AT Protocol (Bluesky) operations as tools, enabling AI assistants to read, write, and interact on Bluesky with human-in-the-loop control.

Enables MCP-compatible AI clients to securely read a user's Microsoft 365 data across Outlook, Calendar, Teams, meetings, OneNote, SharePoint, OneDrive, Loop, and Search, and to send Outlook email only after explicit user confirmation.

Pushary is an MCP server that connects AI agents to push notifications, enabling human-in-the-loop approval from a phone.

Enables AI agents to provision their own email inbox on cooperemail.com, then send, receive, search, and thread real mail, get signed webhooks on delivery, and loop in a human owner who can reply to unblock decisions.

Enables AI agents to send messages to human users via chat platforms (currently Discord) and optionally wait for human responses, facilitating human-in-the-loop interactions.

A lightweight MCP-style server integrating Google Docs and Gmail, enabling AI to append structured content to documents and create email drafts with human-in-the-loop approval.

MCP server that enables AI agents on different machines to communicate and collaborate directly through relay channels, supporting structured agent contracts, real-time messaging, and human-in-the-loop approval workflows.

Enables MCP agents to send and receive iMessages via BlueBubbles, allowing human-in-the-loop oversight and replies from a phone.

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

Enables AI agents to search and act on Telegram conversations, groups, channels, files, and links, with semantic search, AI-powered knowledge extraction, human-in-the-loop approvals, and PostgreSQL/pgvector persistence.

Turns a shared GitHub repository into a message bus so that agents and their subagents on two different machines can converse in parallel: an issue is a thread, a comment is a reply, and closing it is an acknowledgement. Provides zero-dependency tools for sending addressed or broadcast messages, incrementally polling an inbox with a per-identity cursor, reading and replying within threads, and closing the loop with an ack.

Human-in-the-loop approvals and notifications for AI agents via WhatsApp. Enables Cursor, Claude Code, and autonomous AI agents to reach users away from their computers.

Integrates with Google Docs and Gmail for AI-driven document editing and email drafting, featuring human-in-the-loop approval.

Enables appending content to Google Docs and creating Gmail drafts with interactive human-in-the-loop approval for safety.

Enables AI assistants to interact with users via Telegram to request decisions, approvals, or specific input through text and clickable buttons. This facilitates a human-in-the-loop workflow where the AI can pause for feedback or send status notifications during long-running tasks.