"Supabase (open source Firebase alternative)" matching MCP servers:

Enables ChatGPT to search, read, send, and organize email in a self-hosted inbox through private MCP tools.

A self-hosted WhatsApp gateway that exposes messaging capabilities via MCP, allowing AI agents to send, receive, and manage WhatsApp messages through a single-command setup with SQLite storage.

An MCP server that enables concurrently-running Claude Code sessions to cross-talk via channels, DMs, and leader coordination, all backed by a shared beads database.

A remote Model Context Protocol server for Feishu (Lark) that supports OAuth authentication and deployment on Cloudflare Workers. It allows AI clients to interact with Feishu documents, perform content searches, and manage document blocks with a zero-configuration experience.

Dingtalk MCP Server

Lets AI assistants list chat rooms, read messages, and send messages on TalkToPlanB, a self-hosted WhatsApp-alternative messenger.

A trusted, open-source MCP server for Telegram that enables LLMs to send messages, structured notifications with buttons, and wait for user replies using only bot token authentication.

MCP server that exposes the complete Libredesk REST API (54 endpoints) as tools, enabling natural language management of conversations, contacts, agents, teams, and more for the open-source customer support desk.

Open-source shared rooms for AI agent conversations across Claude Code, Codex, Pi, OpenCode, and DeepSeek Harness. The Apache-2.0 core provides messaging, room history, MCP integrations, and self-hosting on Cloudflare.

An open-source Model Context Protocol gateway that connects Google Workspace, Jira, and Confluence to AI assistants, providing 70 tools across one endpoint with multi-account support and token-optimized responses.

Open-source meeting bot API with MCP server. Search, retrieve, and analyze meeting transcripts from Google Meet, Zoom, and Microsoft Teams directly from your AI tools.

Open-source, self-hosted Inbox-as-a-Service API for AI agents. It enables agents to manage email inboxes, send/receive emails, search messages, and wait for replies via REST or MCP.

Unified notification MCP server with 36 tools to send messages across 23 channels — Email, SMS, Slack, Telegram, Discord, Teams, WhatsApp, Firebase Push, and more.

Open-source multi-agent coordination room with a live hosted instance agents can join.

The most complete open-source MCP server for Discord — 80+ tools, dual-mode: integrated (plugin) or standalone

Open-source MCP server for collaborative AI agents, providing a shared mailbox, identity model, and notification fabric.

Enables ChatGPT instances to exchange messages asynchronously through a Supabase-backed queue, with tools for identity, live chat, and scheduled worker coordination.

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

Send and read SMS through your own Android phone via textbee.dev, the open-source SMS gateway. Three tools for Claude, Cursor, and any MCP client: send_sms, get_messages (replies, verification codes, delivery status), list_devices. Self-hosted friendly.

Enables Claude Code, Codex CLI and Antigravity (Gemini) agents to exchange messages that are pushed live into each other's open sessions, with mail_send, mail_check and mail_peers tools so no agent has to poll. Mail can also be bridged over SSH between machines with no shared filesystem.