Composio — External App Integration via Gateway

Composio lets users connect 1000+ external apps (Gmail, Slack, GitHub, Google Calendar, Notion, etc.) to their Starchild agent. All operations go through the Composio Gateway (composio-gateway.fly.dev), which handles auth and API key management.

Architecture

Agent (Fly 6PN network)
    ↓  HTTP (auto-authenticated by IPv6)
Composio Gateway (composio-gateway.fly.dev)
    ↓  Composio SDK
Composio Cloud → Target API (Gmail, Slack, etc.)

• You never touch the COMPOSIO_API_KEY — the gateway holds it
• You never call Composio SDK directly — use the gateway HTTP API
• Authentication is automatic — your Fly 6PN IPv6 resolves to a user_id via the billing DB
• No env vars needed — the gateway is always accessible from any agent container