User wants to access or interact with external apps (Gmail, Slack, GitHub, Notion, etc.)
User wants to automate a task using an external service (send email, create issue, post message)
Building an AI agent or app that integrates with external tools
Multi-user apps that need per-user connections to external services

Setup

Check if the CLI is installed; if not, install it:

curl -fsSL https://composio.dev/install | bash

After installation, restart your terminal or source your shell config, then authenticate:

composio login       # OAuth; interactive org/project picker (use -y to skip)
composio whoami      # verify org_id, project_id, user_id

For agents without direct browser access: composio login --no-wait | jq to get URL/key, share URL with user, then composio login --key <cli_key> --no-wait once they complete login.

1. Use Apps via Composio CLI

Use this when: The user wants to take action on an external app directly — no code writing needed. The agent uses the CLI to search, connect, and execute tools on behalf of the user.

Key commands (new top-level aliases):

composio search "<query>" — find tools by use case
composio execute "<TOOL_SLUG>" -d '{...<input params>}' — execute a tool
composio link [toolkit] — connect a user account to an app (agents: always use --no-wait for non-interactive mode)
composio listen — listen for real-time trigger events

Typical workflow: search → link (if needed) → execute

Full reference: [Composio CLI Guide](rules/composio-cli.md)

2. Building Apps and Agents with Composio

Use this when: Writing code — an AI agent, app, or backend service that integrates with external tools via the Composio SDK.

Run this first inside the project directory to set up the API key:

composio init

Full reference: [Building with Composio](rules/building-with-composio.md)

npx skills add composio-community/skills --skill composio