"A JavaScript library for building user interfaces (React)" matching MCP servers:

Enables AI agents to interact with Slack using a user token, providing full access to message search, channel history, DMs, and posting as the user.

Enables interaction with Slack workspaces as a user, supporting channel listing, message posting, threading, reactions, and user management via the Slack API.

All-in-one Feishu/Lark MCP for Claude Code & Codex. 84 tools, 3 auth layers, send-as-user (cookie + protobuf protocol path). Covers IM, docs, bitable, wiki, drive, calendar, tasks v2, OKR, realtime WS events.

Enables AI agents to access and interact with a Discord user account via the Discord client API, allowing them to read servers, channels, DMs, mentions, and message history, and optionally send messages and perform other actions.

Integrates Telegram user account with MCP, exposing operations like reading and sending messages, managing chats, and more via stdio or SSE transport.

Enables AI assistants to directly control a personal Telegram account via MTProto, providing access to chats, messages, search, and account management features.

Enables interaction with Discord using personal user tokens instead of bot applications, allowing for seamless message management and server exploration. It provides tools for reading history, sending messages, and searching across channels and DMs directly through MCP-compatible clients.

An MCP server that connects to Telegram as your real user account and exposes read-only tools to read and search messages, list chats and folders, inspect group info, and download media.

Enables interaction with Reddit through a Reddable account, allowing users to fetch posts and comments, reply to discussions, and manage comment visibility using secure API key authentication.

An MCP server that enables AI agents to pause and request human approval or information via Slack, Telegram, or macOS dialogs before proceeding with actions.

Provides over 1,000 creative ways to decline requests across four categories (polite, humorous, professional, and creative). The MCP server wraps a REST API to help users craft professional rejections through natural language interactions.

Enables AI apps on the local computer to search and read Thunderbird mail, organize messages, manage contacts, and prepare drafts, with optional controlled sending. Access is limited to user-selected accounts and tool groups, with local-only communication and a pause control.

Connects AI agents to anonymous strangers for asking and answering questions in character.

A multi-modal user intent collection MCP server that allows AI agents to ask users questions and receive text/image replies.

Enables reading and sending messages in Google Messages for web through a paired Chrome tab using chromefile, with tools for status, listing conversations, reading message history, and sending texts.

Provides MCP-compatible AI clients with full access to a Flarum forum's API, enabling reading, searching, creating discussions, replying, moderation, and management of users, tags, and groups.

A standalone remote MCP server that lets AI clients read, search, post, schedule, and manage messages and files in Mattermost as each individual user through per-user OAuth, without requiring a plugin or Enterprise license. It keeps each user's Mattermost tokens server-side, enforces per-user permissions and API limits, and ships guard rails against duplicate or unintended posts.

Enables ChatGPT and Codex to interact with Zoho Mail through Zoho's official MCP service, with safe workflows and capability boundaries.

Shows your current Claude Desktop activity as Discord Rich Presence, including model, status, usage, and subscription info.

Enables AI assistants to book meetings, check availability, and manage Cal.com scheduling through natural conversation.

Enables AI assistants to interact with Slack workspaces by listing channels, posting messages and thread replies, adding emoji reactions, retrieving channel history and thread replies, and inspecting user profiles. Supports both stdio and Streamable HTTP transports for flexible integration.

Enables AI to send push notifications to your phone via a configurable gateway. It is a thin wrapper that posts to an Apprise push gateway.

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

Lets an AI assistant read call and message history, send texts and picture messages, reach Phone Book contacts by name, and — once switched on — place calls run by a voice agent, all limited to the phone numbers the user ticks. Hosted remotely with OAuth sign-in, so nothing needs to be installed locally.

Multi-user Gmail MCP server that enables sending/receiving emails, managing accounts, and searching mail via SMTP/IMAP with per-user isolation and encrypted app passwords.

Run free live audience Q&A and polls from your agent: start an AskOne room, add and launch a poll, approve or hide questions and mark them answered, close the room, then read the questions as a FAQ draft and get the results. Free AI moderation. Uses an organization API token from askone.org

Discover and connect your agents with other agents via A2A protocol. Share resources for free or fee.

A read-only MCP server that lets AI search a user's own LINE Desktop chat history on macOS, providing tools to list chats, retrieve messages, and search conversations directly from the local encrypted database.

Enables Claude to interact with WhatsApp on macOS through the Model Context Protocol. It allows reading messages, searching contacts, listing chats, and sending replies via natural conversation.

Enables Claude to send Telegram messages through your own bot for notifications, such as routine summaries, long-running task completions, and issue alerts.