ComposioHQ/Composio
Composio powers 1000+ toolkits, tool search, context management, authentication, and a sandboxed workbench to help you build AI agents that turn intent into action.
Composio is an open-source integration layer that connects AI agents to 1,000+ apps and tools, handling authentication, tool search, and execution so an agent can take real actions. Instead of hand-coding every integration, you give your agent a managed toolkit and a sandboxed workbench to run it.
Our Review
Composio comes from ComposioHQ and has drawn 28,000 GitHub stars as a way to give AI agents real-world reach. Where a raw function-calling setup leaves you wiring and authenticating every service by hand, Composio ships managed connectors for over 1,000 apps plus the auth, tool search, and sandbox to run them.
What Composio does:
- •1,000+ managed integrations pre-built connectors for tools like GitHub, Gmail, Slack, Notion, Linear, and Jira, exposed as agent-ready actions.
- •Built-in authentication handles OAuth and API-key flows per user, so your agent acts on behalf of real accounts without you building auth.
- •Tool search agents find the right action from thousands at runtime instead of loading every tool schema into context.
- •Framework-agnostic SDKs Python and TypeScript SDKs that drop into LangChain, CrewAI, OpenAI, and other agent frameworks.
- •MCP support expose toolkits over the Model Context Protocol, including a remote MCP server.
- •Sandboxed workbench run and test tool calls in an isolated environment before shipping.
Getting started:
Install with pip install composio or npm i @composio/core, create an API key, then connect a toolkit and pass its tools to your agent. Docs at docs.composio.dev.
Limitations:
Composio is the open-source SDK, but the managed connector backend and hosted auth run as a service with paid tiers, so heavy production use is not purely free. You depend on Composio's catalog and uptime for third-party connections. The 1,000+ toolkit surface is broad, so for an agent that only needs one or two integrations, a direct API call may be simpler.
Our Verdict
Composio is one of the fastest ways to take an AI agent from talking to doing in 2026. If your agent needs to actually send the email, open the pull request, or update the CRM, Composio's 1,000+ managed integrations and built-in auth save you from hand-building every connector, with 28,000 stars behind it.
For developers, the win is auth and breadth: Composio handles per-user OAuth and exposes thousands of actions through Python and TypeScript SDKs that slot into LangChain, CrewAI, or a plain OpenAI loop. Tool search keeps context lean by fetching only the actions an agent needs, and MCP support plugs the same toolkits into MCP clients.
Skip Composio if your agent needs just one or two integrations; a direct API call avoids a dependency and a paid service tier. If you want fully self-hosted connectors with no external backend, a self-hosted automation platform may fit better than relying on Composio's hosted catalog.
Frequently Asked Questions
What is Composio?
Composio is an open-source integration platform from ComposioHQ that connects AI agents to more than 1,000 external apps and tools. It provides managed connectors, per-user authentication, tool search, and a sandboxed workbench, exposed through Python and TypeScript SDKs, so an agent can take real actions like sending email or updating a CRM instead of only generating text.
Is Composio free and open source?
Composio's SDK is open source under the MIT license as of 2026, and you can use it for free. The managed connector backend and hosted authentication run as a service with free and paid tiers, so high-volume production use moves into a paid plan. For light use and self-managed setups, the open-source SDK covers the core.
Which agent frameworks does Composio support?
Composio is framework-agnostic. Its Python and TypeScript SDKs integrate with LangChain, CrewAI, OpenAI's function calling, and other agent frameworks, and it also exposes toolkits over the Model Context Protocol through a remote MCP server. You connect a toolkit once and use the same actions across whichever framework your agent is built on.
How is Composio different from Zapier?
Zapier automates workflows between apps for people, with a visual builder and triggers. Composio is built for AI agents: it exposes app actions and authentication as tools an LLM can call at runtime, with tool search and SDKs for developers. Choose Zapier for no-code human automations; choose Composio when an autonomous agent needs to call apps programmatically.
Does Composio handle authentication for me?
Yes. Handling authentication is one of Composio's main jobs as of 2026. It manages OAuth and API-key flows on a per-user basis, so your agent can act on behalf of individual users' accounts without you building and storing those credential flows yourself. This is a large part of why teams adopt it over hand-coding integrations.
How do I install Composio?
Visit the GitHub repository at https://github.com/ComposioHQ/composio for installation instructions.
What license does Composio use?
Composio uses the MIT license.
What are alternatives to Composio?
Explore related tools and alternatives on My AI Guide.
Open source & community-verified
MIT licensed: free to use in any project, no strings attached. 28,603 developers have starred this, meaning the community has reviewed and trusted it.
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