Composio
Managed auth plus 1,000+ app toolkits so agents can act in Slack, Gmail, GitHub
Composio is the plumbing layer between an agent and the SaaS apps it needs to touch: 1,000+ integrations with delegated OAuth handled for you, just-in-time tool loading, sandboxed execution, triggers, and context-aware sessions. Its headline is "Everything your agents need to take action", and it is model- and framework-agnostic — sessions can also be consumed as MCP, which turns Claude Code or Cursor into an agent that executes across connected apps. The SDK is open source (MIT, ComposioHQ/composio, ~29.7k stars, pushed the day this entry was verified); the hosted platform is metered by tool call and carries SOC 2 and ISO 27001:2022. It is developer infrastructure, not a design resource — it belongs here as the integration layer under an AI product you are designing.
pip install composioPrefer this over hand-rolling OAuth per integration the moment a user's agent needs to write to more than two third-party apps — the delegated-auth and token-refresh work is the actual cost, not the API calls. Pull tools just-in-time rather than loading all 1,000+ toolkits into context, or you will blow the window before the first turn. Pricing is per tool call, so a retry loop is a billing bug: cap retries and surface a usage meter in any UI you build on it. If the user only needs one app, a direct SDK call is cheaper and simpler.
Why it is here. The clearest answer to the auth problem that stalls most agent products, and the MIT SDK means you can read exactly what it does before trusting it with a user's Gmail token.
- 1,000+ integrations with managed delegated auth
- sessions consumable as MCP by Claude Code or Cursor
- MIT SDK, ~29.7k stars, pushed today
- priced per tool call with a 20K/mo free tier
- SOC 2 and ISO 27001:2022
Verified 2026-08-15. HTTP 200. https://composio.dev/ (WebFetch), https://composio.dev/pricing (WebFetch, tiers verbatim), https://docs.composio.dev/ (WebFetch, MCP session details), api.github.com/repos/ComposioHQ/composio (stars, MIT, pushed_at), pypi.org/pypi/composio/json (0.19.0), registry.npmjs.org/@composio/core (0.16.0).
