Composio

Managed auth plus 1,000+ app toolkits so agents can act in Slack, Gmail, GitHub

Tier A · StrongServiceMCP ServerRegistrycomposio.dev

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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.

Install

pip install composio

For an agent

Prefer 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.

Install command, framework, licence and component list.

Facts

License: MIT, Proprietary / all rights reserved
Pricing: Freemium, Usage-based / credits, Subscription, Free but account required
Framework: Python, React
Styling: Not applicable
Distribution: Hosted SaaS product, Public HTTP API, MCP server, npm package, GitHub repository
Platform: Web, Platform agnostic
Content type: Code, Prose / writing
Agent readiness: MCP server, Public API without auth, Structured documentation, Readable open source, Login required
Accessibility: Not applicable
Maturity: Actively maintained
Pricing detail: Totally Free $0 — 20K tool calls/mo, community support. Ridiculously Cheap $29/mo — 200K calls, $0.299 per 1K extra. Serious Business $229/mo — 2M calls, $0.249 per 1K extra, Slack support. Enterprise custom (SLA, SOC-2, VPC/on-prem).
GitHub stars: 29,693
Package: @composio/core

Helps you build

Integrations API Keys API Documentation Usage And Limits Pricing Website

Notable for

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

Provenance

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).

Also in Agent Design Tooling

composio.devTier A