OmniMCP by Arcade.dev

Give your AI assistant instant access to 500+ everyday tools — Slack, Gmail, GitHub, Google Calendar, Notion, Linear, Dropbox, and more — over a single connection. Just ask for what you want; OmniMCP picks the right tool, handles sign-in, and gets it done.

Endpoint: https://omni.arcade.dev/mcp

This repo packages client plugins for the hosted Omni MCP server (the server itself is a separate codebase): a Cursor plugin, a Claude Code / Cowork plugin, a Claude Desktop connector, and an OpenCode plugin. One-click installers also live on the splash page — omni.arcade.dev.

The first time you connect you sign in with Arcade. After that, each app (Google, GitHub, Slack, …) prompts a one-time sign-in the first time it's used. No API keys to paste.

The tools

Every client gets the same four meta-tools, which resolve to the full Arcade catalog on demand:

• Arcade_SelectTools — find the right tool for a task
• Arcade_UseTool — run it
• Arcade_Apps — see or disconnect your connected apps
• Arcade_ManageToolAuthorization — fix an app connection (switch account, expired sign-in, missing permissions)

The plugins add guidance (skills, a rule), slash commands, an operator subagent, and session hooks on the clients that support them.

Cursor

Tools only (one click):

This adds the arcade MCP server only — no rule, skills, commands, or hooks. Approve the install, then open Settings → MCP, find arcade, and sign in with Arcade.

Full plugin (rule + skills + commands + subagent + hook): pending Cursor Marketplace listing. To load it locally today, copy or symlink this repo to ~/.cursor/plugins/local/arcade and restart Cursor.

Claude Code (CLI)

/plugin marketplace add arcadeai-labs/omnimcp   # register this repo as a marketplace
/plugin install arcade@arcade                   # install the plugin
/mcp                                            # sign in to the "arcade" server

Then just ask in plain language, or use the commands:

• /arcade:do <task> — do something in an app (Slack, Gmail, GitHub, …)
• /arcade:apps — see, disconnect, or fix your connected apps
• /arcade:tools <query> — preview which tools would run (debugging)

Want only the tools (no commands/skills/subagent)? Add the bare server instead:

claude mcp add --transport http arcade https://omni.arcade.dev/mcp

Claude in the desktop app (Cowork & Code)

Plugins work in Cowork and Code (not plain Chat).

1. Open the Plugins page → Add marketplace.
2. Enter arcadeai-labs/omnimcp (or https://github.com/arcadeai-labs/omnimcp).
3. Install the arcade plugin and sign in with Arcade when prompted.

You get the same commands, skills, and operator subagent as Claude Code.

For plain Chat (which doesn't use plugins), connect the server directly: Settings → Connectors → Add custom connector → paste https://omni.arcade.dev/mcp (requires a paid Claude plan). That gives the tools only — no slash commands. If your version lacks custom connectors, merge clients/claude-desktop/claude_desktop_config.json into your claude_desktop_config.json and restart (requires Node; uses a pinned mcp-remote stdio proxy).

OpenCode

The opencode-arcade plugin is published on npm. One command:

opencode plugin opencode-arcade

It registers the arcade MCP server for you (OAuth is auto-discovered — no keys) and shows app sign-in links as toasts. Run opencode mcp auth arcade if it doesn't prompt automatically.

Prefer configuring the MCP server yourself? Add to opencode.json (project) or ~/.config/opencode/opencode.json (global):

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "arcade": { "type": "remote", "url": "https://omni.arcade.dev/mcp", "enabled": true }
  }
}

(Ready-made: clients/opencode/opencode.json.)

Try it

• "Send a Slack message to #eng that the deploy is done."
• "What's on my calendar tomorrow?"
• "Open a GitHub issue in arcadeai-labs/omnimcp titled 'flaky CI'."
• "Summarize my unread email from today."

What's in this repo

One shared core plus a small adapter per client. Every manifest declares its component paths explicitly — nothing loads by folder convention.

Privacy

Tasks run through Arcade's hosted Omni server (omni.arcade.dev) and the apps you connect. See Arcade's privacy policy for how data is handled.

Links

• Home: https://omni.arcade.dev
• Endpoint: https://omni.arcade.dev/mcp
• Plugin source: https://github.com/arcadeai-labs/omnimcp

License

Apache-2.0. Copyright (c) 2024–Present Arcade AI.